Ask the Expert: FSPF Concepts and Troubleshooting in Cisco SAN Environments

With Upinder Sujlana
Welcome to the Cisco Support Community Ask the Expert conversation. This is an opportunity to learn and ask questions about FSPF, VSAN interaction, load balancing, and troubleshooting with Upinder Sujlana.
According to the FC-SW-2 standard, Fabric Shortest Path First (FSPF) is a link state path selection protocol. FSPF keeps track of the links on all switches in the fabric and associates a cost with each link. FSPF tracks the state of links on all switches in the fabric, associates a cost with each link in its database, and then chooses the path with a minimal cost. The cost associated with an interface can be administratively changed to implement the FSPF route selection. Upinder will discuss Cisco's implementation of FSPF.
Upinder Sujlana is a customer support engineer for Cisco's SAN TAC team based in San Jose, CA. He has worked in the TAC for the past five years with a focus on WAN technologies (L2TP, T1, T3, SCE 2K, 8K) and data center technologies such as MDS; Cisco Nexus 7000, 5000, and 2000; FCoE; and FC. Prior to joining the TAC, Upinder was a Java client-side programmer for an NMS startup company and then transitioned to network testing for a cloud company. He holds a master's degree in electrical engineering from Santa Clara University and has CCIE certification (no. 37318) in routing and switching. These days he is enthusiastic about Python programming.
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Upinder might not be able to answer each question due to the volume expected during this event. Remember that you can continue the conversation in Data Center community, sub-community, Storage Networking discussion forum shortly after the event. This event lasts through March 14, 2014. Visit this forum often to view responses to your questions and the questions of other community members.

Hi Evan,
You can use my favorite command as below to find out the cost and check what path traffic will take. Here is a example :
switch1# show fspf internal route vsan 2
FSPF Unicast Routes
VSAN     Number          Dest Domain          Route Cost          Next hops
1                   0x01(1)                    1000                  fc1/2
1                   0xEF(239)                  1000                  fc1/1
1                   0xED(238)                  2000                  fc1/1
                                                                     fc1/2
This shows the total cost of all links.
The next hop (238) has two interfaces. This indicates that both paths will be used during load sharing. Up to sixteen paths can be used by FSPF with a Cisco MDS 9000 Family switch.
http://www.cisco.com/en/US/products/ps5989/prod_troubleshooting_guide_chapter09186a008067a306.html#wp126591
HTH,
~upinder

Similar Messages

Ask the Expert: Configuration, Design, and Troubleshooting of Cisco Nexus 1000

With Louis Watta
Welcome to the Cisco Support Community Ask the Expert conversation. This is an opportunity to learn and ask questions about design, configuration, and troubleshooting of Cisco Nexus 1000V Series Switches operating inside VMware ESXi and Hyper-V with Cisco expert Louis Watta. Cisco Nexus 1000V Series Switches deliver highly secure, multitenant services by adding virtualization intelligence to the data center network. With Cisco Nexus 1000V Series Switches, you can have a consistent networking feature set and provisioning process all the way from the virtual machine access layer to the core of the data center network infrastructure.
This is a continuation of the live Webcast.
Louis Watta is a technical leader in the services organization for Cisco. Watta's primary background is in data center technologies: servers (UNIX, Windows, Linux), switches (MDS, Brocade), storage arrays (EMC, NetApp, HP), network switches (Cisco Catalyst and Cisco Nexus), and enterprise service hypervisors (VMware ESX, Hyper-V, KVM, XEN). As a Technical Leader in Technical Services, Louis currently supports beta and early field trials (EFTs) on new Cisco software and hardware. He has more than 15 years of experience in a wide variety of data center applications and is interested in data center technologies oriented toward data center virtualization and orchestration. Prior to Cisco, Louis was a system administrator for GTE Government Systems. He has a bachelor of science degree in computer science from North Carolina State University. .
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Louis might not be able to answer each question because of the volume expected during this event. Remember that you can continue the conversation on the Data Center community Unified Computing shortly after the event.
This event lasts through Friday, JUne 14, 2013. Visit this forum often to view responses to your questions and the questions of other Cisco Support Community members.
Webcast related links:
Slides
FAQ
Webcast Video Recording

Right now there is only a few features that are not supported on N1Kv on Hyper-V
They are VXLAN and QOS Fair Weighted Queuing. We are currently demoing VXLAN functionality at Microsoft TechEd Conference this week in New Orleans. So VXLAN support should be coming soon. I can't give you a specific timeline.
For Fair Weighted Queuing I'm not sure. In the VMware world we take advantage of NETIOC infrastructure. In the MS world they do not have a NETIOC infrastructure that we can use to create a similar feature.
Code base parity (as in VMware and Hyper-V VSMs running NXOS 5.x) will happen with the next major N1KV release for ESX.
Let me know if that doesn't answer your question.
thanks
louis

Ask the Expert: Basic Introduction and Troubleshooting on Cisco Nexus 7000 NX-OS Virtual Device Context

With Vignesh R. P.
Welcome to the Cisco Support Community Ask the Expert conversation.This is an opportunity to learn and ask questions of Cisco expert Vignesh R. P. about the Cisco® Nexus 7000 Series Switches and support for the Cisco NX-OS Software platform .
The Cisco® Nexus 7000 Series Switches introduce support for the Cisco NX-OS Software platform, a new class of operating system designed for data centers. Based on the Cisco MDS 9000 SAN-OS platform, Cisco NX-OS introduces support for virtual device contexts (VDCs), which allows the switches to be virtualized at the device level. Each configured VDC presents itself as a unique device to connected users within the framework of that physical switch. The VDC runs as a separate logical entity within the switch, maintaining its own unique set of running software processes, having its own configuration, and being managed by a separate administrator.
Vignesh R. P. is a customer support engineer in the Cisco High Touch Technical Support center in Bangalore, India, supporting Cisco's major service provider customers in routing and MPLS technologies. His areas of expertise include routing, switching, and MPLS. Previously at Cisco he worked as a network consulting engineer for enterprise customers. He has been in the networking industry for 8 years and holds CCIE certification in the Routing & Switching and Service Provider tracks.
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Vignesh might not be able to answer each question due to the volume expected during this event. Remember that you can continue the conversation on the Data Center sub-community discussion forum shortly after the event. This event lasts through through January 18, 2013. Visit this forum often to view responses to your questions and the questions of other community members.

Hi Vignesh
Is there is any limitation to connect a N2K directly to the N7K?
if i have a an F2 card 10G and another F2 card 1G and i want to creat 3 VDC'S
VDC1=DC-Core
VDC2=Aggregation
VDC3=Campus core
do we need to add a link between the different VDC's
thanks

Ask the Expert: Installation, Operation, and Troubleshooting of RF Gateway 1 (RFGW1)

With Ron Hanson
Welcome to the Cisco Support Community Ask the Expert conversation. This is an opportunity to learn and ask questions from Cisco expert Ron Hanson about the RF Gateway 1 (RFGW1) including installation, operation, configuration, and troubleshooting.
Ron Hanson is a customer support engineer in the Technical Assistance Center, where he supports major RF Gateway 1 customers as part of the Service Providers Video team. He started working with the RF Gateway before its general release in 2008, and worked in the field on large Gateway deployments before joining product support. Hanson has been in the cable TV industry for 38 years. He previously spent 22 years at Scientific-Atlanta, which was acquired by Cisco in 2007. He holds two joint patents and is certified as a Cisco Optical Specialist.
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Ron might not be able to answer each question due to the volume expected during this event. Remember that you can continue the conversation on the Service Provider sub-community discussion forum shortly after the event. This event lasts through Sept 7, 2012. Visit this forum often to view responses to your questions and the questions of other community members.

Hi John,
Thanks for your reply. The process of moving a license to another gateway can be done by the customer on the web site named HESULE https://online.sciatl.com/license-it/. You will need the HOST ID which can be found on the SYSTEM/License management tab. The HOST ID is essentially the 7 digit serial number with all leading zeros removed.
Be sure to use Firefox when logging in. Entering your email is important because the new license will be sent back to this address.
In the License management tab, on the gateway you wish to remove the license from, record the 32 digit validation key number to the right of the license you wish to transfer.
Go to HESULE and start the transfer process. Hesule is very secure - therfore you must "prove" to Hesule the license has been removed from the first chassis. Hesule will issue you a new license with the license you wish to transfer removed. When you load this new license and new validation key will come up on the screen. Go back to Hesule and enter this key to prove the license has been removed. Hesule will then email you another new license containing the license you are transfering. Load this license on the new RFGW1 and the process is complete.
Yes I understand I said a lot. However, the process is described step by step on the Hesule site.
If you have any problems do not hesitate to contact me.
Thank you RON HANSON

Ask the Expert: Installing, Configuring, and Troubleshooting Cisco Unified MeetingPlace

With Dejan Petrovic
Welcome to the Cisco Support Community Ask the Expert conversation. This is an opportunity to learn and ask questions about different MeetingPlace deployment types, what they include and require, and what they are capable of with Cisco expert Dejan Petrovic. Cisco Unified MeetingPlace is a conferencing solution providing audio and video conferencing, and data sharing experience. It can be fully on premise solution or a hybrid solution integrated with WebEx for data sharing capability. Dejan will be answering any questions about installation, upgrade, migration and troubleshooting processes.
Dejan Petrovic is a Cisco customer support engineer and team lead in the Conferencing Technical Assistance Center team based in Boxborough. He has been providing support to customers and partners for Cisco Unified MeetingPlace solutions since 2009. He has more than eight years of experience working in the IT industry as system administrator, business manager, and networking consultant. Petrovic holds a bachelor’s degree in computer network and information systems as well as several Cisco certifications, including CCNA, Cisco IPCC Express Specialist, and MeetingPlace Support Specialist.
Remember to use the rating system to let Dejan know if you have received an adequate response.
Dejan might not be able to answer each question due to the volume expected during this event. Remember that you can continue the conversation on the Collaboration, Voice and Video sub-community discussion forum shortly after the event. This event lasts through February 8, 2013. Visit this forum often to view responses to your questions and the questions of other community members.

Hello Nick,
I appreciate your questions, and will try to answer them below.
When you are installing a fresh new MeetingPlace 8.5 that you plan to integrate with WebEx, the only available option is WebEx Managed user profiles. With this option, you can either create profiles manually on WebEx side, and then sync them to MeetingPlace, or you can use Federated SSO for import of profiles from LDAP server in your network to WebEx, and then sync the profiles from WebEx to MeetingPlace (you choose one of these two options when provisioning WebEx site).
These are the only two available options for a NEW install of MP8.5 for WebEx integration, and as you can see both options are WebEx Managed profiles, the only difference is if you are going to use Federated SSO, or create profiles on WebEx manually.
During the install, you can select to install MeetingPlace managed users option, but you would choose this option only if you plan to do a migration from an earlier MP release (7.x/8.0) with WebEx integration and Directory Integration.
For example, MeetingPlace managed profiles option is available if you had MeetingPlace 8.0 integrated with WebEx Type II (WebEx scheduling) with Directory Integration, where you had your MP8.0 integrated with CUCM via AXL for user profile management (CUCM integrated with LDAP), and your WebEx Site provisioned for Directory Integration, and then migrate from that system to MeetingPlace 8.5 that you installed selecting MeetingPlace managed user profiles.
The same goes for MeetingPlace Scheduling (Type I) integration with WebEx. Possible only with migration, and not with a fresh new installation.
Now, to focus on your questions.
1. As you can see, you don't have many options. If you have MS Active Directory that you would like to use for SSO in MP8.5 WebEx Scheduling, you will have to go with Federated SSO. So far, I haven't heard of any issues with that as it seems to be pretty straight forward to configure, and also WebEx Support team provides direct support for that setup as it is a direct integration between WebEx Site and the LDAP server (nothing to do with MeetingPlace side of the equation).
2. In general, if you have Federated SSO enabled, you would go to WebEx site home page, click on Host Log In button which will then ask you to enter your network/windows credentials and place you to WebEx scheduling interface.
If you have Directory Integration (like on MP8.0 WebEx Type II with CUCM/AXL integration), when you go to WebEx site home page and click Host Log In button, you are being redirected to the MeetingPlace log-in page where you would enter your Windows credentials (assuming your CUCM is integrated with LDAP), and then if log in is successful, you get redirected back to WebEx scheduling interface. With this type of deployment, you can log in to WebEx scheduling interface ONLY if you are connecting from your company network or have a VPN connection to your company network. This is a major limitation that most customers complained about, but the reason for this was that we didn't want to make MP Application server hostname/IP publicly available and hence cause a security issue.
I am sure I answered your questions, but opened some new questions. So, please, let me know if I need to clarify anything.
Thank you.
-Dejan

Ask The Expert: Understanding, Implementing, and Troubleshooting Cisco Prime Network

Ask questions and learn about Cisco Prime Network with Cisco experts Vignesh Rajendran Praveen and Jaminder Singh Bali.
Cisco Prime Network is and Cisco Prime Network provides cost-effective device operation, administration and network fault management for today’s complex and evolved programmable networks (EPNs). It is a single solution to support both the traditional physical network components, as well as compute infrastructure, and the virtual elements found in data centers. Automated configuration and change management combined with advanced troubleshooting and diagnostics greatly help service providers enable proactive service assurance. Additionally, the flexible and extensible architecture is designed to support the multivendor environment, helping to lower operational costs.
This event runs January 5 through January 16, 2015.
Vignesh Rajendran Praveen is a High Touch Engineer with the Focused Technical Services team supporting Cisco's major Service Provider customers in Routing, Switching, Multiprotocol Label Switching (MPLS) technologies and Cisco Prime Network related issues. Previously at Cisco he has worked as a Network Consulting Engineer for Enterprise Customers and as a Customer Support Engineer for Service Provider customers. He has been in the networking industry for ten years and holds CCIE certification (#34503) in the Routing and Switching as well as Service Provider tracks.
Jaminder Singh Bali is a Customer Support Engineer working in SP-NMS TAC team, supporting Cisco's major service provider customers in Cisco Prime Network, Performance and Prime Central related issues. His areas of expertise include Oracle, Linux and NMS applications. He has been in the industry for past six years.
Remember to use the rating system to let the experts know if you have received an adequate response.
The Experts might not be able to answer each question due to the volume expected during this event. Remember that you can continue the conversation in Network Infrastructure community, sub-community, LAN, Switching and Routing discussion forum shortly after the event. This event lasts through January 16, 2015. Visit this forum often to view responses to your questions and the questions of other community members.

Hello Jerome,
A variety of Cisco devices are supported by the the Cisco Prime Network. I would encourage you to go through the below links on the user guide depending the version of Cisco Prime Network being used.
"Cisco Prime Network Supported Cisco Virtual Network Elements (VNEs)"
"Cisco Prime Network Supported Cisco VNEs - Addendum"
Below is the link for the user guide.
http://www.cisco.com/c/en/us/support/cloud-systems-management/prime-network/products-user-guide-list.html
Hope this would help in providing you more clarity.
***********Plz do rate this post if you found it helpful*************************
Thanks & Regards,
Vignesh R P

Ask the Expert: Plan, Design, and Implement Mobile Remote Access, the Cisco Collaboration Edge Architecture

Welcome to the Cisco® Support Community Ask the Expert conversation. This is an opportunity to learn and ask questions about planning, designing, and implementing mobile remote access (Cisco Collaboration Edge Architecture) with Cisco subject matter experts Aashish Jolly and Abhijit Anand.
Cisco Collaboration Edge Architecture is an architecture that provides VPN-less access of Cisco Unified Communications resources to Cisco Jabber® users. This discussion is dedicated to addressing questions about design best practices while implementing mobile remote access.
For more information, refer to the Unified Communications Mobile and Remote Access via Cisco VCS deployment guide.
Aashish Jolly is a network consulting engineer who is currently serving as the Cisco Unified Communications consultant for the ExxonMobil Global account. Earlier at Cisco, he was part of the Cisco Technical Assistance Center (TAC), where he helped Cisco partners with installation, configuring, and troubleshooting Cisco Unified Communications products such as Cisco Unified Communications Manager and Manager Express, Cisco Unity® solutions, Cisco Unified Border Element, voice gateways and gatekeepers, and more. He has been associated with Cisco Unified Communications for more than seven years. He holds a bachelor of technology degree as well as Cisco CCIE® Voice (#18500), CCNP® Voice, and CCNA® certifications and VMware VCP5 and Red Hat RHCE certifications.
Abhijit Singh Anand is a network consulting engineer with the Cisco Advanced Services field delivery team in New Delhi. His current role involves designing, implementing, and optimizing large-scale collaboration solutions for enterprise and defense customers. He has also been an engineer at the Cisco TAC. Having worked on multiple technologies including wireless and LAN switching, he has been associated with Cisco Unified Communications technologies since 2006. He holds a master’s degree in computer applications and multiple certifications, including CCIE Voice (#19590), RHCE, and CWSP and CWNP.
Remember to use the rating system to let Aashish and Abhijit know if you have received an adequate response.
Because of the volume expected during this event, our experts might not be able to answer every question. Remember that you can continue the conversation on the Cisco Support Community Collaboration, Voice and Video page, in the Jabber Clients subcommunity, shortly after the event. This event lasts through June 20, 2014. Visit this forum often to view responses to your questions and the questions of other Cisco Support Community members.

Hi Marcelo,
Yes, there are some requirements for certificates in Expressway.
Expressway Core (Exp-C)
- Can be signed by either External or Internal CA
- Better to use a cluster name even if you start with 1 peer in Exp-C cluster. In the future, if more peers are added, changes would be minimal.
- Better to use FQDN of cluster as CN of certificate, this way the traversal zone configuration on Expressway-E won't require any change even if new peers are added to Exp-C cluster.
- If CUCM is mixed mode, include security profile names (in FQDN format) as Subject Alternate Names
- The Chat Node Aliases that are configured on the IM and Presence servers. They will be required only for Unified Communications XMPP federation deployments that intend to use both TLS and group chat. (Note that Unified Communications XMPP federation will be supported in a future Expressway release). The Expressway-C automatically includes the chat node aliases in the CSR, providing it has discovered a set of IM&P servers.
- For TLS b/w CUCM, IM-P & Exp-C
+ If using self-signed certificates on CUCM, IM/P. Load Cisco Tomcat, cup, cup-xmpp certificates from IM-P on Exp-C. Load callmanager, Cisco Tomcat certificates from CUCM on Exp-C.
+ If using Internal CA signed certificates on CUCM, IM/P. Load Root CA certificates on Exp-C.
+ Load CA certificate under tomcat-trust, cup-trust, cup-xmpp-trust on IM-P.
+ Load CA certificate under tomcat-trust, callmanager-trust on CUCM.
Expressway Edge (Exp-E)
- Signed by External CA
- Configured Unified Communications domain as Subject Alternate Name
- If using a cluster, select FQDN of this peer as CN and FQDN of Cluster + this peer as Subject Alternate Name.
- If XMPP federation is being deployed, enter the same Chat Node Aliases as entered in Exp-C.
For more details, please refer to the Certificate Creation Guide for Cisco Expressway x8.1.1
http://www.cisco.com/c/dam/en/us/td/docs/voice_ip_comm/expressway/config_guide/X8-1/Cisco-Expressway-Certificate-Creation-and-Use-Deployment-Guide-X8-1.pdf
- Aashish

Ask the Expert: Enterprise Design and Deployment of Multicast

Welcome to this Cisco Support Community Ask the Expert conversation. This is an opportunity to learn and ask questions about Cisco enterprise design and deployment of multicast solutions.
The enterprise world is evolving to be overcome with large throughput capacity and record numbers of users connecting to the network. Mechanisms such as multicast, which allows for a minimization of throughput for multiple users subscribing to the same stream, are a welcome addition. Applications such as enterprise all-hands video streaming, trading applications, mass operating system deployment, and custom implementations can put a strain on the network if done via unicast. Multicast can minimize this strain by replicating a single stream for subscription by multiple parties who would like to receive the same information. For this Ask the Expert event, Patrick Lloyd, CCIE R&S no. 39750 and a network consulting engineer with Cisco’s Enterprise Advanced Services Delivery Team, will answer questions about multicast design and implementation based on best practices and prior experience with large enterprise deployments.
Patrick Lloyd is a network consulting engineer for Cisco’s Enterprise East Advanced Services team, working to support and lend his expertise to a number of financial, insurance, healthcare, and consulting customers. In his four years of experience, he has lent design expertise to multicast networks ranging from 500 Cisco devices and 20K users to upward of 4500 Cisco devices and 50K users. Patrick is certified with his Cisco Certified Internetworking Expert no. 39750 in the Routing and Switching track and also has achieved certification in CCNA Security and Securing Cisco Routers and Switches as part of the CCNP Security track. Patrick received his MS degree in networking and systems administration from Rochester Institute of Technology in Rochester, NY, and his BS degree in computer science from Eastern Connecticut State University. He frequently gives customer-based knowledge transfers.
Remember to use the rating system to let Patrick know if you have received an adequate response.
Because of the volume expected during this event, Patrick might not be able to answer every question. Remember that you can continue the conversation in Network Infrastructure under the subcommunity WAN, Routing & Switching shortly after the event. This event lasts through September 12, 2014. Visit this forum often to view responses to your questions and the questions of other Cisco Support Community members.

Thanks for the question! This is actually a good one that I've encountered with a couple customers in the past, the tradeoff between a flood and prune type design, as opposed to the shared tree -> shortest path tree sequence. As per Cisco best practice, we are actively trying to get customers to implement sparse mode, going so far as to not support PIM dense mode in our data center products. And for good reason! The last thing you want is a chatty protocol within the data center which is flooding traffic out to receivers who may or may not be interested in it every 3 minutes. Instead, you're much better off having interested receivers join a stream, have your RP connect the interested senders and receivers, and then transition to the shortest path between source and destination.
That being said, if you're studying for CCIE or looking to get experience in how multicast works, dense mode should at least be a lab exercise!
Links for reference as to the difference in PIM modes:
Dense Mode Operation:
http://www.cisco.com/en/US/docs/ios/ipmulti/configuration/guide/imc_pim_dense_rfrsh.pdf
Pim Modes and explanation of each:
http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst3750x_3560x/software/release/12-2_53_se/configuration/guide/3750xscg/swmcast.html#wp1077051
A great slide deck to learn the operation of multicast:
https://www.ciscolive.com/online/connect/sessionDetail.ww?SESSION_ID=6633&backBtn=true
Troubleshooting Multicast:
https://www.ciscolive.com/online/connect/sessionDetail.ww?SESSION_ID=78578&backBtn=true
Let me know if this is the answer you're looking for!

Ask the Expert: Different Flavors and Design with vPC on Cisco Nexus 5000 Series Switches

Welcome to the Cisco® Support Community Ask the Expert conversation. This is an opportunity to learn and ask questions about Cisco® NX-OS.
The biggest limitation to a classic port channel communication is that the port channel operates only between two devices. To overcome this limitation, Cisco NX-OS has a technology called virtual port channel (vPC). A pair of switches acting as a vPC peer endpoint looks like a single logical entity to port channel attached devices. The two devices that act as the logical port channel endpoint are actually two separate devices. This setup has the benefits of hardware redundancy combined with the benefits offered by a port channel, for example, loop management.
vPC technology is the main factor for success of Cisco Nexus® data center switches such as the Cisco Nexus 5000 Series, Nexus 7000 Series, and Nexus 2000 Series Switches.
This event is focused on discussing all possible types of vPC along-with best practices, failure scenarios, Cisco Technical Assistance Center (TAC) recommendations and troubleshooting
Vishal Mehta is a customer support engineer for the Cisco Data Center Server Virtualization Technical Assistance Center (TAC) team based in San Jose, California. He has been working in TAC for the past 3 years with a primary focus on data center technologies, such as the Cisco Nexus 5000 Series Switches, Cisco Unified Computing System™ (Cisco UCS®), Cisco Nexus 1000V Switch, and virtualization. He presented at Cisco Live in Orlando 2013 and will present at Cisco Live Milan 2014 (BRKCOM-3003, BRKDCT-3444, and LABDCT-2333). He holds a master’s degree from Rutgers University in electrical and computer engineering and has CCIE® certification (number 37139) in routing and switching, and service provider.
Nimit Pathak is a customer support engineer for the Cisco Data Center Server Virtualization TAC team based in San Jose, California, with primary focus on data center technologies, such as Cisco UCS, the Cisco Nexus 1000v Switch, and virtualization. Nimit holds a master's degree in electrical engineering from Bridgeport University, has CCNA® and CCNP® Nimit is also working on a Cisco data center CCIE® certification While also pursuing an MBA degree from Santa Clara University.
Remember to use the rating system to let Vishal and Nimit know if you have received an adequate response.
Because of the volume expected during this event, Vishal and Nimit might not be able to answer every question. Remember that you can continue the conversation in the Network Infrastructure Community, under the subcommunity LAN, Switching & Routing, shortly after the event. This event lasts through August 29, 2014. Visit this forum often to view responses to your questions and the questions of other Cisco Support Community members.

Hello Gustavo
Please see my responses to your questions:
Yes almost all routing protocols use Multicast to establish adjacencies. We are dealing with two different type of traffic –Control Plane and Data Plane.
Control Plane: To establish Routing adjacency, the first packet (hello) is punted to CPU. So in the case of triangle routed VPC topology as specified on the Operations Guide Link, multicast for routing adjacencies will work. The hellos packets will be exchanged across all 3 routers and adjacency will be formed over VPC links
http://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus5000/sw/operations/n5k_L3_w_vpc_5500platform.html#wp999181
Now for Data Plane we have two types of traffic – Unicast and Multicast.
The Unicast traffic will not have any forwarding issues, but because the Layer 3 ECMP and port channel run independent hash calculations there is a possibility that when the Layer 3 ECMP chooses N5k-1 as the Layer 3 next hop for a destination address while the port channel hashing chooses the physical link toward N5k-2. In this scenario,N5k-2 receives packets from R with the N5k-1 MAC as the destination MAC.
Sending traffic over the peer-link to the correct gateway is acceptable for data forwarding, but it is suboptimal because it makes traffic cross the peer link when the traffic could be routed directly.
For that topology, Multicast Traffic might have complete traffic loss due to the fact that when a PIM router is connected to Cisco Nexus 5500 Platform switches in a vPC topology, the PIM join messages are received only by one switch. The multicast data might be received by the other switch.
The Loop avoidance works little different across Nexus 5000 and Nexus 7000.
Similarity: For both products, loop avoidance is possible due to VSL bit
The VSL bit is set in the DBUS header internal to the Nexus.
It is not something that is set in the ethernet packet that can be identified. The VSL bit is set on the port asic for the port used for the vPC peer link, so if you have Nexus A and Nexus B configured for vPC and a packet leaves Nexus A towards Nexus B, Nexus B will set the VSL bit on the ingress port ASIC. This is not something that would traverse the peer link.
This mechanism is used for loop prevention within the chassis.
The idea being that if the port came in the peer link from the vPC peer, the system makes the assumption that the vPC peer would have forwarded this packet out the vPC-enabled port-channels towards the end device, so the egress vpc interface's port-asic will filter the packet on egress.
Differences: In Nexus 5000 when it has to do L3-to-L2 lookup for forwarding traffic, the VSL bit is cleared and so the traffic is not dropped as compared to Nexus 7000 and Nexus 3000.
It still does loop prevention but the L3-to-L2 lookup is different in Nexus 5000 and Nexus 7000.
For more details please see below presentation:
https://supportforums.cisco.com/sites/default/files/session_14-_nexus.pdf
DCI Scenario: If 2 pairs are of Nexus 5000 then separation of L3/L2 links is not needed.
But in most scenarios I have seen pair of Nexus 5000 with pair of Nexus 7000 over DCI or 2 pairs of Nexus 7000 over DCI. If Nexus 7000 are used then L3 and L2 links are required for sure as mentioned on above presentation link.
Let us know if you have further questions.
Thanks,
Vishal

Ask the Expert: Single-Site and Multisite FlexPod Infrastructure

With Haseeb Niazi and Chris O'Brien
Welcome to the Cisco Support Community Ask the Expert conversation. This is an opportunity to learn and ask questions about Single-Site and Multisite FlexPod Infrastructure with experts Haseeb Niazi and Chris O'Brien.
This is a continuation of the live webcast.
FlexPod is a predesigned and prevalidated base data center configuration built on Cisco Unified Computing System, Cisco Nexus data center switches, NetApp FAS storage components, and a number of software infrastructure options supporting a range of IT initiatives. FlexPod is the result of deep technology collaboration between Cisco and NetApp, leading to the creation of an integrated, tested, and validated data center platform that has been thoroughly documented in a best practices design guide. In many cases, the availability of Cisco Validated Design guides has reduced the time to deployment of mission-critical applications by 30 percent.
The FlexPod portfolio includes a number of validated design options that can be deployed in a single site to support both physical and virtual workloads or across metro sites for supporting high availability and disaster avoidance. This session covers various design options available to customers and partners, including the latest MetroCluster FlexPod design to support a VMware Metro Storage Cluster (vMSC) configuration.
Haseeb Niazi is a technical marketing engineer in the Data Center Group specializing in security and data center technologies. His areas of expertise also include VPN and security, the Cisco Nexus product line, and FlexPod. Prior to joining the Data Center Group, he worked as a technical leader in the Solution Development Unit and as a solutions architect in Advanced Services. Haseeb holds a master of science degree in computer engineering from the University of Southern California. He’s CCIE certified (number 7848) and has 14 years of industry experience.
Chris O'Brien is a technical marketing manager with Cisco’s Computing Systems Product Group. He is currently focused on developing infrastructure best practices and solutions that are designed, tested, and documented to facilitate and improve customer deployments. Previously, O'Brien was an application developer and has worked in the IT industry for more than 20 years.
Remember to use the rating system to let Haseeb and Chris know if you have received an adequate response.
Because of the volume expected during this event, Haseeb and Chris might not be able to answer every question. Remember that you can continue the conversation in the Data Center community, subcommunity Unified Computing shortly after the event. This event lasts through September 27, 2013. Visit this forum often to view responses to your questions and the questions of other Cisco Support Community members.
Webcast related links:
Single-Site and Multisite FlexPod Infrastructure - Slides from live webcast
Single-Site and Multisite FlexPod Infrastructure: FAQ from live webcast
Single-Site and Multisite FlexPod Infrastructure - Video from live webcast

I would suggest you read this white paper which details the pros and cons of direct connect storage.
http://www.cisco.com/en/US/partner/prod/collateral/ps10265/ps10276/whitepaper_c11-702584.html   This paper captures all the major design points for Ethernet and FC protocols.
I would only add that in FlexPod we are trying to create a highly available solution and "flexible" solution; Nexus switching helps us deliver on both with vPC and unified ports.
NPV equats to end-host mode which allows the system to present all of the servers as N ports to the external fabric. In this mode, the vHBAs are pinned to the egress interfaces of the fabric interconnects. This pinning removes the potential of loops in the SAN fabric. Host based multipathing of the vHBAs account for potential uplink failures. The NPV mode (end-host mode) simplifies the attachment of UCS into the SAN fabric and that is why it is in NPV mode by default.
So for your last question, I will have to put my Product Manager hat on so bear with me.   First off there is no drawback to enabling the NPIV feature (none that I am aware of) the Nexus 5000 platform simply offers you a choice to design and support multiple FC initiators (N-Ports) per F-Port via NPIV. This allows for the integration of the FI end-host mode described above. I imagine being a unfied access layer switch, the Nexus team enabled standard Fibre Channel switching capability and features first. The implementatin of NPIV is a customer choice based on their specific access layer requirements.
/Chris

ASK THE EXPERTS - WAAS MONITORING AND REPORTING

Welcome to the Cisco Networking Professionals Ask the Expert conversation. This is an opportunity to learn about Cisco Wide Area Application Services monitoring and reporting with Michael Holloway and Joe Merrill. Michael is an escalation support engineer in the Application Delivery Business Unit focusing on escalations to engineering related to the Cisco Wide Area Application Services (WAAS) product. He has worked with Cisco WAAS since its initial development, and with the first product beta.
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Joe Merrill is an escalation support engineer in the Application Delivery Business Unit focusing on escalations to engineering related to the Cisco Wide Area Application Services (WAAS) product. He has worked with Cisco WAAS since its initial development, and with the first product beta.
Remember to use the rating system to let Michael and Joe know if you have received an adequate response.
Michael and Joe might not be able to answer each question due to the volume expected during this event. Our moderators will post many of the unanswered questions in other discussion forums shortly after the event. This event lasts through August 27, 2010. Visit this forum often to view responses to your questions and the questions of other community members.

Very good questions. Let me try and take them one at a time. Some of the answers you will likely find in the CM GUI help (upper-left corner is the Help button), or in the online documentation. But let's add a little more color and detail.
1)When we pull bandwidth Optimization report, on Y-Axis the graphs says Effective Capacity .What is Effective Capacity?
Basically, the "effective increased bandwidth capacity" is telling you how much additional WAN bandwidth you've gained because of the optimization. It will chart somewhere between 1 times and 100 times. Typically it charts all traffic, though you can configure it to chart traffic for specific Applications.
The CDM online help gives the formulas used to chart the graph:
Effective WAN Capacity = 1 / (1-% Reduction Excluding Pass-Through)
% Reduction Excluding Pass-Through = (Original Excluding Pass-Through - Optimized) / (Original Excluding Pass-Through)
2)what is reduction % excluding and including passthrough
Looking at the formulas given above might help you understand. The one is a reduction ratio compared to only the original traffic that is optimized. The other is a reduction ratio compared to all original traffic, whether it is optimized or not. So, if you want to know what kind of optimization you are getting for the traffic that you configured to have optimized, look at the "excluding pass-through" numbers. If you want to know the positive effect that optimization is having on your full traffic load, take a look at the "including pass-through" numbers.
3)What is effectivity capacity including and excluding passthrough ?
The effective capacity is what kind of throughput you can potentially realize on the WAN -- assuming you would fill it to 100% capacity -- because of the level of optimization you are seeing. The "including" numbers show you the effect of optimization compared to all the traffic passing through the WAE whether it is optimized or not. The "excluding" numbers show the effect of optimization compared only to the traffic that is receiving optimizations.
4)With the help of which report, we can show the customer that the file download which took 10 mins in first attempt, is downloaded in 10secons in next attempt?
This one is a little trickier. The reports are much broader than a single connection. They are for all traffic, or for traffic that matches specific defined Applications. You could create a separate Application and matching classifiers for the client and/or server IP addresses and/or ports, run the test, then configure the charts to only show you the data for that Application. By default, statistics for an Application aren’t charted unless you check the "Enable Statistics" box when defining/editing the Application.
5)How to show that the bandwidth utilization has decreased by which %.
You want to look at the % reduction numbers you asked about in #2 above.
6)Which report says that the applications have become this much time faster?
These questions are normally put forwarded by many customers ? Can you please help me with your expertise answer ?
This is probably the hardest question to answer.
"Faster" isn't always easy to define. You are probably talking about user experience rather than statistics found in a network device. What determines that experience? A web page fully populating with all the pictures? A CIFS-based application that saves a file? A custom application that collects data from different servers over different protocols to perform some operation? Much of that is subjective and based on multiple individual requests, sometimes over different protocols.
What we can provide are statistics to show the effect of WAN optimization and application acceleration for specific types of traffic. We can't show you that displaying a web page is N times faster with WAAS, because we don't know which of all the many HTTP requests that are made are specific to the user experience. But we can show that each of the requests received so much overall optimization, so much optimization from DRE, so much optimization from LZ, so much added benefit from HTTP acceleration.
What you would probably do is collect some base-line timings for performing certain user activities, then perform the same operations both cold (first pass) and warm (subsequent passes). Back up those timing numbers with reports from the CM GUI, and perhaps even the "show statistics connection connection-id ". Which reports to use? Start with those Optimization and Acceleration reports. Those are the reports we expect will give the most complete/accurate pictures of the benefit of WAAS. You can also create and even schedule custom reports as needed.

Ask-The-Expert (ATE) Questions and Demos

You can quickly access many of the answers and demos held during our Support Model for the Channel and Their Customers Ask the Expert (ATE) session for the Business ByDesign version of FP2.6
You can access the demo recording here; https://sap.na.pgiconnect.com/p10867840/
Below is a time stamp (MM:SS) of the start of a question or key topic during the session.
05:15 u2013 what are the different ways to request support and creating incidents in the system during an implementation project ?
8:45 u2013 How to create a support incident when the Business ByDesign system is down?
11:20 - What is the role of a key user in ByD and to get to get access as a Key User in Business ByDesign?
13:50 u2013 Demonstration u2013 How to log a new incident in ByD?
15:43 u2013 who dies the user gets notified if there is any issue in the system with automatic job runs ex: if the Invoice run fails?
21:40 u2013 How to take over an incident and forward it to support in ByD?
33:50 u2013 what is the system provisioning process for partners and how partners can request a test, prod or data migration system?
Edited by: Imtiyaz Mohammed on Sep 19, 2011 4:09 PM

I want to Identify the Creator of RFQ in MM Module, Please Suggest.
Thanks

Ask the Expert: Scaling Data Center Networks with Cisco FabricPath

With Hatim Badr and Iqbal Syed
Welcome to the Cisco Support Community Ask the Expert conversation. This is an opportunity to learn and ask questions about the Cisco FabricPath with Cisco technical support experts Hatim Badr and Iqbal Syed. Cisco FabricPath is a Cisco NX-OS Software innovation combining the plug-and-play simplicity of Ethernet with the reliability and scalability of Layer 3 routing. Cisco FabricPath uses many of the best characteristics of traditional Layer 2 and Layer 3 technologies, combining them into a new control-plane and data-plane implementation that combines the immediately operational "plug-and-play" deployment model of a bridged spanning-tree environment with the stability, re-convergence characteristics, and ability to use multiple parallel paths typical of a Layer 3 routed environment. The result is a scalable, flexible, and highly available Ethernet fabric suitable for even the most demanding data center environments. Using FabricPath, you can build highly scalable Layer 2 multipath networks without the Spanning Tree Protocol. Such networks are particularly suitable for large virtualization deployments, private clouds, and high-performance computing (HPC) environments.
This event will focus on technical support questions related to the benefits of Cisco FabricPath over STP or VPC based architectures, design options with FabricPath, migration to FabricPath from STP/VPC based networks and FabricPath design and implementation best practices.
Hatim Badr is a Solutions Architect for Cisco Advanced Services in Toronto, where he supports Cisco customers across Canada as a specialist in Data Center architecture, design, and optimization projects. He has more than 12 years of experience in the networking industry. He holds CCIE (#14847) in Routing & Switching, CCDP and Cisco Data Center certifications.
Iqbal Syed is a Technical Marketing Engineer for the Cisco Nexus 7000 Series of switches. He is responsible for product road-mapping and marketing the Nexus 7000 line of products with a focus on L2 technologies such as VPC & Cisco FabricPath and also helps customers with DC design and training. He also focuses on SP customers worldwide and helps promote N7K business within different SP segments. Syed has been with Cisco for more than 10 years, which includes experience in Cisco Advanced Services and the Cisco Technical Assistance Center. His experience ranges from reactive technical support to proactive engineering, design, and optimization. He holds CCIE (#24192) in Routing & Switching, CCDP, Cisco Data Center, and TOGAF (v9) certifications.
Remember to use the rating system to let Hatim and Iqbal know if you have received an adequate response.
They might not be able to answer each question due to the volume expected during this event. Remember that you can continue the conversation on the Data Center sub-community Unified Computing discussion forum shortly after the event. This event lasts through Dec 7, 2012.. Visit this support forum often to view responses to your questions and the questions of other Cisco Support Community members.

Hi Sarah,
Thank you for your question.
Spanning Tree Protocol is used to build a loop-free topology. Although Spanning Tree Protocol serves a critical function in these Layer 2 networks, it is also frequently the cause of a variety of problems, both operational and architectural.
One important aspect of Spanning Tree Protocol behavior is its inability to use parallel forwarding paths. Spanning Tree Protocol forms a forwarding tree, rooted at a single device, along which all data-plane traffic must flow. The addition of parallel paths serves as a redundancy mechanism, but adding more than one such path has little benefit because Spanning Tree Protocol blocks any additional paths
In addition, rooting the forwarding path at a single device results in suboptimal forwarding paths, as shown below, Although a direct connection may exist, it cannot be used because only one active forwarding path is allowed.
Virtual PortChannel (vPC) technology partially mitigates the limitations of Spanning Tree Protocol. vPC allows a single Ethernet device to connect simultaneously to two discrete Cisco Nexus switches while treating these parallel connections as a single logical PortChannel interface. The result is active-active forwarding paths and the removal of Spanning Tree Protocol blocked links, delivering an effective way to use two parallel paths in the typical Layer 2 topologies used with Spanning Tree Protocol.
vPC provides several benefits over a standard Spanning Tree Protocol such as elimination of blocker ports and both vPC switches can behave as active default gateway for first-hop redundancy protocols such as Hot Standby Router Protocol (HSRP): that is, traffic can be routed by either vPC peer switch.
At the same time, however, many of the overall design constraints of a Spanning Tree Protocol network remain even when you deploy vPC such as
1.     Although vPC provides active-active forwarding, only two active parallel paths are possible.
2.     vPC offers no means by which VLANs can be extended, a critical limitation of traditional Spanning Tree Protocol designs.
With Cisco FabricPath, you can create a flexible Ethernet fabric that eliminates many of the constraints of Spanning Tree Protocol. At the control plane, Cisco FabricPath uses a Shortest-Path First (SPF) routing protocol to determine reachability and selects the best path or paths to any given destination in the Cisco FabricPath domain. In addition, the Cisco FabricPath data plane introduces capabilities that help ensure that the network remains stable, and it provides scalable, hardware-based learning and forwarding capabilities not bound by software or CPU capacity.
Benefits of deploying an Ethernet fabric based on Cisco FabricPath include:
• Simplicity, reducing operating expenses
– Cisco FabricPath is extremely simple to configure. In fact, the only necessary configuration consists of distinguishing the core ports, which link the switches, from the edge ports, where end devices are attached. There is no need to tune any parameter to get an optimal configuration, and switch addresses are assigned automatically.
– A single control protocol is used for unicast forwarding, multicast forwarding, and VLAN pruning. The Cisco FabricPath solution requires less combined configuration than an equivalent Spanning Tree Protocol-based network, further reducing the overall management cost.
– A device that does not support Cisco FabricPath can be attached redundantly to two separate Cisco FabricPath bridges with enhanced virtual PortChannel (vPC+) technology, providing an easy migration path. Just like vPC, vPC+ relies on PortChannel technology to provide multipathing and redundancy without resorting to Spanning Tree Protocol.
Scalability based on proven technology
– Cisco FabricPath uses a control protocol built on top of the powerful Intermediate System-to-Intermediate System (IS-IS) routing protocol, an industry standard that provides fast convergence and that has been proven to scale up to the largest service provider environments. Nevertheless, no specific knowledge of IS-IS is required in order to operate a Cisco FabricPath network.
– Loop prevention and mitigation is available in the data plane, helping ensure safe forwarding that cannot be matched by any transparent bridging technology. The Cisco FabricPath frames include a time-to-live (TTL) field similar to the one used in IP, and a Reverse Path Forwarding (RPF) check is also applied.
• Efficiency and high performance
– Because equal-cost multipath (ECMP) can be used the data plane, the network can use all the links available between any two devices. The first-generation hardware supporting Cisco FabricPath can perform 16-way ECMP, which, when combined with 16-port 10-Gbps port channels, represents a potential bandwidth of 2.56 terabits per second (Tbps) between switches.
– Frames are forwarded along the shortest path to their destination, reducing the latency of the exchanges between end stations compared to a spanning tree-based solution.
    – MAC addresses are learned selectively at the edge, allowing to scale the network beyond the limits of the MAC addr

Ask the Expert: Cisco Prime Infrastructure - Implementation and Deployment

Welcome to the Cisco Support Community Ask the Expert conversation.
This Ask The expert Session will cover questions spanning Cisco Prime Infrastructure on Implementation and Deployment on Wired and Wireless. This will be more specific to Customer’s and Partners questions product covering PI on configuration, Features and Menu, Network Monitoring, Maps, Implementation, High Availability and Maintenance and t/s parts.
Monday, February 2nd, 2015 to Friday, February 13th, 2015
Dhiresh Yadav is a customer support engineer in High-Touch Technical Services (HTTS) handling supporting Wireless and Network Management based Cisco products and is based in Bangalore. His areas of expertise include Cisco Prime Infrastructure and Cisco Wireless products. He has over 7 years of industry experience working with large enterprise and service provider networks. He also holds CCNP (RS) and CCIE (DC) certifications.
Afroz Ahmad is a customer support engineer in High-Touch Technical Services (HTTS) handling supporting Wireless and Network Management based Cisco products and is based in Bangalore. His areas of expertise include Cisco NMS products like Prime Infrastructure, LMS, IP SLA and SNMP etc. He has over 7 years of industry experience working with large enterprise and service provider networks. He also holds CCNP (RS),CCIE (DC), and SCJP (Sun Certified Java Professional )
Vinod Kumar Arya is a customer support engineer in High-Touch Technical Services (HTTS) handling supporting Wireless and Network Management based Cisco products and is based in Bangalore. His areas of expertise include Cisco NMS products like Prime Infrastructure, LMS, IP SLA and SNMP etc. He has over 8 years of industry experience working with large enterprise and service provider networks. He also holds VCP 5 and RHCE certifications.
** Remember to use the rating system to let the experts know you have received an adequate response.**
Because of the volume expected during this event, the experts might not be able to answer every question. Remember that you can continue the conversation in the Network Infrastructure community, > Network Management, shortly after the event. This event lasts through February 13th 2015. Visit this forum often to view responses to your questions and those of other Cisco Support Community members.

Hello Wilson,
Thanks for joining us.
1841 should just work fine for net flow . Hope you have a valid "PI Assurance license" installed on the server.
"PI Assurance license" is required for "net-flow" feature
Devices supporting Netflow in PI ::
1400, 1600, 1700 & 1800
2500, 2600 & 2800
3600, 3700, 3750 & 3800
4500 & 4700
AS5300 & 5800
7200, 7300, 7400 & 7500
Catalyst 4500 ASCI
Catalyst 5000, 6500, & 7600 ASCI
ESR 10000 ASCI
GSR 12000 ASCI
Cisco IOS Software Release Version
Supported Cisco Hardware Platforms
11.1CA, 11.1CC
Cisco 7200 and 7500 series, RSP 7200 series
12.0
Cisco 1720, 2600, 3600, 4500, 4700, AS5800
RSP 7000 and 7200 series
uBR 7200 and 7500 series
RSM series
12.0T, 12.0S
Cisco 1720, 2600, 3600, 4500, 4700, AS5800
RSP 7000 and 7200 series
uBR 7200 and 7500 series
RSM series, MGX8800RPM series, and BPx8600 series
12.0(3)T, 12.0(3)S
Cisco 1720, 2600, 3600, 4500, 4700, AS5300, AS5800
RSP 7000 and 7200 series
uBR 7200 and 7500 series
RSM series, MGX8800RPM series, and BPx8650 series
12.0(4)T
Cisco 1400, 1600, 1720, 2500, 2600, 3600, 4500,
4700, AS5300, AS5800
RSP 7000 and 7200 series
uBR 7200 and 7500 series
RSM series, MGX8800RPM series, and BPx8650 series
12.0(4)XE
Cisco 7100 series
12.0(6)S
Cisco 12000 series
NetFlow is also supported by these devices Cisco 800, 1700, 1800, 2800, 3800, 6500, 7300, 7600, 10000, CRS-1 and these Catalyst series switches: 45xx, 55xx, 6xxx.
NetFlow export is also supported on other Cisco switches when using a NetFlow Feature Card (NFFC) or NFFC II and the Route Switch Module (RSM), or Route Switch Feature Card (RSFC). However, check whether version 5 is supported, as most switches export version 7 by default.
You can check the below steps to diagnose the issue::
To verify that NetFlow is exported from a device to PI, follow the steps below:
1)   Browse to Administration > Data Sources page. Check the value in column ‘Last Active Time’ for the ‘Device Data Sources’ table. If the table is empty or the value does not represent recent time, then
it is possible that the device is not exporting NetFlow or PI Assurance license is not applied / expired.
2)   Login to PI console ( via SSH) as root user and run the command:
                netstat –an | grep 9991 – Output of this should be like : udp        0      0 :::9991         :::*
                Check the firewall settings on PI server using the command: firewall -L
1)   Check the configuration on an IOS / IOS –XE device. Run the commands
a)   sh running-config | inc destination
1)   This should list the IP address of the PI SERVER ( along with other outputs if any)
b)   sh running-config | inc 9991
1)   This should list at least one entry.
c)   If the above are fine, then verify that the flow monitor, flow exporter and the flow records are correctly configured on the device.
Refer to the URLs below to configure NetFlow export.
http://preview.cisco.com/en/US/docs/net_mgmt/prime/infrastructure/2.0/user/guide/setup_monitor.html#wp1056427
Thanks-
Afroz
***Ratings Encourages Contributors ****

Synchronizing Ask the expert index

I asked myself a question in Ask the expert , answered it and then tried to Search for it. I couldn't find my own question (and answer). (not an expert maybe?)
The only way I found to make it work was to manually rebuild the index on the answer-column in ATE_SUBMITTED_QUESTIONS. But I'm sure there's another way, because these are not the kind of things you'd like a customer (or myself) to do on a regular basis.
Can anyone give me another way to synchronize this index preferably managed from inside the database?

Hello,
I haven't tested this, but have a look if the index (I'm assuming it's an Oracle Text index?), is using the sync parameter,
something like -
create index foo on bar(woof)
indextype is ctxsys.context
parameters ('SYNC (ON COMMIT)');Note I'm not saying replace the existing index with this (obviously you'd need to modify it to suit anyway!), I'm saying you should be able to include the SYNC(ON COMMIT) into the parameters if it doesn't already use it.
I'm doing this from memory and I believe that the sync on commit was introduced in 10g, so if you're using 9i then this method probably isn't going to work for you and you'll need to run the external sync process (I think it's documented on AskTom if you do a search for syncing text indexes).
Like I say, I'm doing this 'blind', I haven't looked at the index you mean, so I might be barking up the wrong tree here.
Hope this helps,
John.
http://jes.blogs.shellprompt.net
http://apex-evangelists.com

Ask the Expert: FSPF Concepts and Troubleshooting in Cisco SAN Environments

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