Data Center Latencies !!!!

Hello,
I am coming across these phrases where MPLS is legacy, old school etc.etc..
My topic here is not an issue but more of a knowledge gathering where i would like to know more about the new WAN technologies in the market, what are the efficient ways of connecting two cities miles away from each other or countries or continents. Getting latency in WAN is a thing of past and there are better ways to get low latencies.
Please be kind to share insights on the new effiecient WAN technologies that will reduce the latencies drastically.
Thx in advance.
Regards,
Amol.

My topic here is not an issue but more of a knowledge gathering where i would like to know more about the new WAN technologies in the market, what are the efficient ways of connecting two cities miles away from each other or countries or continents. Getting latency in WAN is a thing of past and there are better ways to get low latencies.
This line of questioning sounds very familiar to a school work.
Anyway, MPLS is not a "legacy". It's still there. Growing. The only thing stopping or slowing down the implementation of MPLS/VRF is cost and the knowledge skill.
Have you heard of WAN Acceleration? Have you heard of "dark fibre"? These two are predominantly used to link two (or more) sites together.

Similar Messages

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

Is there a way other than redeployment to migrate existing Cloud Services from one data center to another?

We have a need to correct affinity of Cloud Service, Azure DB, Storage and Mobile Services such that they are on a singl datacenter and do not get impacted by network latency when these components communicate with each other. Also to distribute various environments
across different data centers we need to realign some environments to mitigate all environments getting impacted if there is outage.
Existing Cloud Services and related Service Bus queues and topics need to be moved to a different datacenter. Is there a way to do this without having to redeploy cloud services (web and worker roles) or recreate the service bus entities (queues and topics)?
Also, the existing Cloud Service URL need to be retained without with user authentication won't be possible and hence when completed, the new cloud service should have the same URL.
Please provide best available options for achieving this or ask question if more information is needed.

Hi sumeetd,
As far as I know, currently there is no directly way to move services from one data center to another unless redeployment. You could submit a feature suggestion via this page (http://feedback.azure.com/forums/34192--general-feedback
). And at the same time,you could contact with azure support team via the channel below:
http://www.windowsazure.com/en-us/support/contact/
Any questions, please feel free to let me know.
Regards,
Will
We are trying to better understand customer views on social support experience, so your participation in this interview project would be greatly appreciated if you have time. Thanks for helping make community forums a great place.
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Data Center InterConnect with Dark Fibre

Dear all,
We are designing a Data Center InterConnection for our two Data Centers on top of a 10G Dark Fibre.
Our primary goal is to:-
extend a few vlans between the two DCs;
Support VMware vMotion betwen the two DCs;
asymmetric SAN synchronization;
FCoE for SAN connectivity between the two DCs;
So may I ask if we could run both LAN and SAN connections on this DF connection? We have NX5K on one DC and NX7K on the other, are there specific devices required to enable both LAN and SAN connections?
It would be really appreciated if anyone could shed any lights on this. Any suggestions are welcome!
Best Regards,
James Ren

Hello.
If you are running Active/Backup DC scenario, I would suggest to make network design and configuration exactly the same. This includes platforms, interconnectivity types and etc.
Do you know what is the latency on the fiber between these two DCs?
Another question: why do you run 6880 in VSS, do you really need this?
Q about the diagram: are you going to utilize 4 fibers for DC interconnection?
PS: did you think about OTV+LISP instead of MPLS?

Data Center Interconnect using MPLS/VPLS

We are deploying a backup data center and need to extend couple of Vlans over the backup data center.These two DC's which are interconnected by a fibre link which we manage and terminates on the ODC2MAN and ODCXMAN.We run MPLS on these devices ODC2MAN and ODCXMAN(Cisco 6880) as PE routers. I configured OSPF between these devices and advertised their loopbacks.
I need configuration assistance on my PE (odcxman and odc2man) to run the VFI and the VPLS instances.The vlans on the ODCXAGG need to extend to the ODC2AGG.
Also, I am looking for the configuration assistance such that each core devices should have 3 eigrp neighbors.
For example:
ODC2COR1 should have Eigrp neighbors with ODCXCOR1, ODCXCOR2 and ODC2COR2 and my VPLS Cloud should be emulated as a transparent bridge to my core devices such that it appears that ODC2COR1 is directly connected to ODCXCOR1 and ODCXCOR2 and have cdp neighbor relation. I have attached the diagram.Please let me know your inputs.

Hello.
If you are running Active/Backup DC scenario, I would suggest to make network design and configuration exactly the same. This includes platforms, interconnectivity types and etc.
Do you know what is the latency on the fiber between these two DCs?
Another question: why do you run 6880 in VSS, do you really need this?
Q about the diagram: are you going to utilize 4 fibers for DC interconnection?
PS: did you think about OTV+LISP instead of MPLS?

Welcome to the Solutions and Architectures Data Center & Virtualization Community

Welcome to the Solutions and Architectures Data Center & Virtualization Community. We encourage everyone to share their knowledge and start conversations related to Data Center and Virtualization Solutions and architectures.All topics are welcome, including Servers – Unified Computing, Data Center Security, Data Center Switching, Data Center Management and Automation, Storage Networking, Application Networking Services and solutions to solve business problems.
Remember, just like in the workplace, be courteous to your fellow forum participants. Please refrain from using disparaging or obscene language or posting advertisements.
Cheers,
Dan Bruhn

Hi,
I have a question...
I going to install two Nexus 7009 with three N7K-F248XP-25 modules on each one, I am planning to create 3 VDC, but at the initial configuration the system does not show the ethernets ports of these modules, even with the show inventory and show module I can see tah the modules are recognized and its status is OK. There is something that I have to do before start to configure these modules...? enable some feature or license in order to see the ports with show running CLI...?

Welcome to the Enterprise Data Center Networking Discussion

Welcome to the Cisco Networking Professionals Connection Network Infrastructure Forum. This conversation will provide you the opportunity to discuss general issues surrounding Enterprise Data Center Networking. We encourage everyone to share their knowledge and start conversations on issues such as Mainframe connectivity, SNA Switching Services, DLSw+, managing SNA/IP and any other topic concerning Enterprise Data Center Networking.
Remember, just like in the workplace, be courteous to your fellow forum participants. Please refrain from using disparaging or obscene language or posting advertisements.
We encourage you to tell your fellow networking professionals about the site!
If you would like us to send them a personal invitation simply send their names and e-mail addresses along with your name to us at [email protected]

Hi together,
Since the release of SAP NetWeaver 2004s to 'Unrestricted Shipment' as of 6th of June 2006, we have renamed the forum 'SAP NetWeaver2004s Ramp-Up' to 'BI in SAP NetWeaver2004s'.
The forum should continue to adress BI issues particular to the release SAP NetWeaver 2004s. Please post general BI, project, etc. question to the other existing BI forums.
The SAP NetWeaver BI organisation will also use this forum to communicate / roll-out information particular to the release of SAP NetWeaver 2004s (in addtion to the FAQs and other material on the SAP Service Marketplace and information in other areas of the SDN).
Cheers
SAP NetWeaver BI Organisation

Deploying Cisco Overlay Transport Virtualization (OTV) in Data Center Networks

Welcome to the Cisco Support Community Ask the Expert conversation. This is an opportunity to learn and ask questions about how to plan, design, and implement Cisco Overlay Transport Virtualization (OTV) in your Data Center Network with Cisco experts Anees Mohamed Abdulla and Pranav Doshi.
Anees Mohamed Abdulla is a network consulting engineer for Cisco Advanced Services, where he has been delivering plan, design, and implementation services for enterprise-class data center networks with leading technologies such as vPC, FabricPath, and OTV. He has 10 years of experience in the enterprise data center networking area and has carried various roles within Cisco such as LAN switching content engineer and LAN switching TAC engineer. He holds a bachelor's degree in electronics and communications and has a CCIE certification 18764 in routing and switching.
Pranav Doshi is a network consulting engineer for Cisco Advanced Services, where he has been delivering plan, design, and implementation services for enterprise-class data center networks with leading technologies such as vPC, FabricPath, and OTV. Pranav has experience in the enterprise data center networking area and has carried various roles within Cisco such as LAN switching TAC engineer and now network consulting engineer. He holds a bachelor's degree in electronics and communications and a master's degree in electrical engineering from the University of Southern California.
Remember to use the rating system to let Anees and Pranav know if you have received an adequate response.
Because of the volume expected during this event, Anees and Pranav might not be able to answer each question. Remember that you can continue the conversation on the Data Center, sub-community forum shortly after the event. This event lasts through August 23, 2013. Visit this forum often to view responses to your questions and the questions of other Cisco Support Community members.

Hi Dennis,
    All those Layer 2 extension technologies require STP to be extended between Data Centers if you need to have multiple paths between Data Centers. OTV does not extend STP rather it has its own mechanism (AED election) to avoid loop when multiple paths are enabled. It means any STP control plane issue, we don't carry to the other Data Center.
    OTV natively suppresses Unknown Unicast Flooding across the OTV overlay. Unknown unicast flooding is a painful problem in layer 2 network and difficult to troubleshoot to identify the root cause if you don't have proper network monitoring tool.
   It has ARP optimization which eliminates flooding ARP packets across Data Center by responding locally with cached ARP messages. One of the common issues I have seen in Data Center is some server or device in the network sends continuous ARP packets which hits Control plane in the Aggregation layer which in turn causes network connectivity issue.
The above three points proves the Layer 2 domain isolation between data centers. If you have redundant Data Centers with Layer 2 extended without OTV, the above explained layer 2 issue which happens in one Data Center carries the same failure to the second data center which creates the question of what is the point of having two different Data Centers if we can not isolate the failure domain.
OTV natively supports HSRP localization with few command lines. This is a very important requirement in building Active/Active Data Center.
Even though your question is related to L2TP, OTV deserves the comparison with VPLS and those comparison will also be applicable for L2TP. The below link explains in detail...
http://www.cisco.com/en/US/prod/collateral/switches/ps9441/ps9402/white_paper_c11-574984.html
Thanks,
Anees.

Windows server 2012 Data Center with VDI configuration error message ( The remote session was disconnected because there are no remote desktop license servers available)

Dears,
I have two windows server 2012 Data Center and I configured (Virtual Desktop Interface)VDI on it's.
All my clients connected on both of servers by used Remote Desktop sessions ,5 months since.
Currently,when the clients is connected on the both of servers they received the following error:
"The remote session was disconnected because there are no remote desktop license servers available to provide license"
Kindly note, I installed windows Licenses Server Data Center on the both of servers.
Regards.

Hi,
Please let us know if you have purchased RDS CALs and install it in your RD licensing server.
Also, on RD Session host servers, please make sure that you have specified the license mode and point them to the RD licensing server.
Remote Desktop Services Client Access Licenses (RDS CALs)
http://technet.microsoft.com/en-us/library/cc753650.aspx
RD Licensing Configuration on Windows Server 2012
http://blogs.technet.com/b/askperf/archive/2013/09/20/rd-licensing-configuration-on-windows-server-2012.aspx
Hope this helps.
Jeremy Wu
TechNet Community Support

When trying to start my Windows server 2008 R2 Data Center, I am getting "ramdisk device creation failed due to insufficient memory",

I have the following:-
VMWare workstation version 9 , with windows server 2008 R2 data center installed.
- I have installed the windows 2008 R2 inside the VM using an iso image.
- The host is windows 7.
I use to work well with the VM, but after adding a new VM to the same workstation . I start getting the following error when starting my old VM
ramdisk device creation failed sue to insufficient memory.
And on the windows boot manger screen they mentioned to :-
inset my windows installation dis and restart my PC.
click “repair your computer”
but not sure if this will fix the problem , baring in mind that the RAM assigned to the VM
is 24 GB & 80 GB hard disk.
The error is
Link.
so can any one advice what is causing this error?
Thanks

You might start by checking the RAM.
http://windows.microsoft.com/en-US/windows7/Diagnosing-memory-problems-on-your-computer
Regards, Dave Patrick ....
Microsoft Certified Professional
Microsoft MVP [Windows]
Disclaimer: This posting is provided "AS IS" with no warranties or guarantees , and confers no rights.

Please shed some light on Data Center design

Hi,
    I want you guys to recommend what the design should be. I'm familiar with HP blade system. Let me clarify the existing device.
1. HP Blade with Flex Fabric. It supports FCOE.
2. MDS SAN switch for the storage
3. Network Switch for IP network.
4. HP Storage.
    HP Blade has 2 interface types for IP Network(Network Switch) and Fiberchannel(SAN).
   What is the benifit for using Nexus switch and FCOE for my exising devices. What should be a new design with Nexus switch? Please guide me ideas.
THX
Toshi

Hi, Toshi:
Most of these chat boards have become quite boring. Troubleshooting OSPF LSA problems is old news. But I do pop my head in every now and then. Also, there are so many other companies out there doing exciting things in the data center. You have Dell, Brocade, Arista, Juniper, etc. So one runs the risk of developing a myopic view of the world of IT by lingering around this board for too long.
If you want to use the new B22 FEX for the HP c7000 blade chassis, you certainly can. That means the Nexus will receive the FCoE traffic and leverage its FCF functionality; either separate the Ethernet and FC traffic there, or create a VE-port instantiation with another FCF for multihop deployments. Good luck fighting the SAN team with that one! Another aspect of using the HP B22 is the fact that the FEX is largely plug and play, so you dont have to manage the Flex Fabric switches.
HTH

URGENT: QoS Design on Data Center MPLS - MediaNet Question...

Hello,
I am posting this in hopes I can get some guidance from anyone who has done this in the field. We have a large enterprise customer with 21 sites all around the world, they have Verizon MPLS and are experiencing QoS related issues on their WAN regarding Video/Voice. We have proposed remediating their network acccording to the Enterprise QoS SRND 3.3 and the new MediaNet SRND to account for Video and TP QoS (
http://www.cisco.com/en/US/docs/solutions/Enterprise/WAN_and_MAN/QoS_SRND_40/QoSCampus_40.html )
Here is the problem/question that was proposed in our presales meeting and I honestly don't know where to look for an answer... I am not asking for anyone to design a solution for me, just merely point me in the right direction:
The Data Center has a ~40MB MPLS Connection ( full mesh ) into the cloud ( Verizon )
Site A has a 8MB connection
Site B has a 4MB connection
I know on the Service policy and the interfaces at SiteA and SiteB I can assign "Bandwidth xxxx" and use ~95% of the bandwidth to do queuing and shaping/policing ect. I am not concerned with SiteA and SiteB, that I think I can handle...
Question was posed from the customer, "How can we ensure at the DataCenter level the 40MB MPLS is "chopped" up so that only 8MB of the total speed goes to SiteA ALONG with an attached QoS policy designed for that specific site, as well as ensure only 4MB goes to SiteB with an attached QoS policy.
So I am looking for a way to allocate bandwith per site on the DC 40MB connection going into the cloud ( so that SiteB cannot use more than 4MB ) and attach a MediaNet specific QoS Service policy to that site. The customer does not have seperate MPLS circuits for each site, they all come into the DC on 40MB shared ethernet connection ( no VC, or dedicated circuits to other sites ).
Any thoughts on if this is possible?
Thanks!
Alex

This is an example I have seen and I hope that is useful to you.
Site A
Subnet: 172.16.1.0/24
Site B
Subnet:172.16.2.0/24
HeadOffice:
ip access-list extended Site_A
permit ip any 172.16.1.0 0.0.0.255
ip access-list extended Site_B
permit ip any 172.16.2.0 0.0.0.255
class-map match-any Site_A
match access-group name Site_A
class-map match-any Site_B
match access-group name Site_B
policy-map To_Spokes
class Site_A
shape average 8000000
service-policy Sub_Policy(Optional)
class Site_B
shape average 4000000
service-policy Sub_Policy(Optional)
class class-default
shape average 28000000
service-policy Sub_Policy(Optional)
Interface G0/0
Description To MPLS cloud
bandwidth 40000000
service-policy output To_Spokes
interface G0/1
Description To HeadOffice
bandwidth 40000000
service-policy output To_Spokes
It would be greatly appreciated if someone can correct this or improve it as I am still learning.
Please see the netflow graph from one of our routers using a similar policy as above.

Data Center Aggregation/Access SW Nexus

i have a design scinario for backup email data center, some difficulties faced when trying to match the requirements to Boxes.
the design required a Nexus 5548UP with addition to 2x Virtualized Data center switches, also it required 12 x CPU license for VM Virtual Network Switch. i suggested to add Nexus 1000 series but the consern is can i use it without adding Nexus 2k . if i have to use N2k and N1k what is the best configuration scinario?

Hi Shakeeb,
I don't understand your question very well, but I will try clarify some points.
You don't need a Nexus 2000 if you have enough ports available in your Nexus 5500, even if you will use nexus 1000v.
In this scenario what I recommend to you is connect the both Nexus 5548 each other and create a vpc with upstreams routers and downstream blades and storage.
Richard

How can I create a VM in Brazilian Data Center

I am working on a Proof of Concept to use Cloud Services in Latin America. What I am trying to do is setup an FTP Site in the Azure Brazilian Data Center. So how can
I create a VM in the Brazilian Data Center… I do not see a way to do this through the Portal nor the Management tools. <o:p></o:p>
This question has been posted before but none of the answers seem to be satisfactory. My management does not want to spend money on a support contract until I get a
simple POC configured in this data center. So the only support mechanism I have is through the forums. For this reason I am posting this question again in hopes I receive a better answer for it.

Hi,
I guess, the Brazil Regions are available only to customers with billing addresses in Brazil.
The restriction on subscription location and access is documented here at the bottom:
http://azure.microsoft.com/en-us/regions/#services
I suggest you could contact with azure support team using the below link to get more details:
http://www.windowsazure.com/en-us/support/contact/
Also, I suggest you could use azure
powershell or
mangemnet API to create VM and set the region as "Brazil South".
Hope this helps.
Girish Prajwal

Query on DNS setup for Active Directory for a new data center

I have third party DNS appliances providing DNS Service for Active Directory (Windows 2008 R2) and there are also secondary DNS servers, which are MS DNS server with a secondary zone configured, for redundancy. I have to setup a new data center
and move servers/services to this data center. In this scenario, can I install a new Microsoft DNS server with a secondary zone and use this as the primary DNS Server for all the member servers at this new location ? I am aware that this new DNS server will
not be able to make any updates to the secondary zone and for that purpose, is there anyway to redirect such requests to the DNS appliances in my current data center across the WAN ? I am trying to avoid purchasing a new DNS appliance for the new data center
and want to know what are the alternatives I have.

im not entirely sure by your setup, as normally you would use AD integrated zones for DNS in an AD environment - although there are other options as you have already setup.
the fact the zone is a secondary zone in DNS server terms doesn't mean you can't point your clients to it as their primary dns server. They will quite happily resolve names using a secondary server.
so as long as your dns devices are correctly setup to support the additional secondary zone I see no reason why you couldn't do this.
Regards,
Denis Cooper
MCITP EA - MCT
Help keep the forums tidy, if this has helped please mark it as an answer
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Data Center Latencies !!!!

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