Capacity issue on Metro Ethernet

We have a 10MB Metro-E customer experiencing bandwidth issues and would like to determine if we could be the cause. We have 9 of these 10MB Metro-E’s, our host circuit is 50MB and our backbone is 100MB (bandwidth on the host and edge never exceed 50%). The M-E circuits come in on a 3825 that also serves as the Edge Router so all of this is in one device. Customer is doing Windows server replication and is complaining about the upload bandwidth. There are questions about shaping, capacity and if the 3825 is “big enough”.
We do see them hitting the 10MB but not maintaining it, which is what they have an issue with. My original tests did indicate an issue and I reached out to AT&T. We had no shaping in place and they indicated that if they were bursting over 10MB D/L they would have issues with U/L. I put shaping in place and still had issues. After more research they came back and indicated they found an issue on a “trunk” and moved several circuits, ours included, to a new trunk. My testing after that showed huge improvements. I could consistently get 10MB either way but full duplex capped around 8.5x8.5. AT&T indicated that would be expected with 64 byte packets, all looks good, thanks for your business. (Yesterday I happened to catch it doing 8.4x10.3, but again the perception is that it is not consistant).
Config attached, thanks in advance.

netatalk package from ubuntu repository
Here is the "how to" i used to make it work. I'm using UBUNTU server 8.04.
thanks

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Customer Equipment for Metro Ethernet Link

Hi All
It has been some time since I utilised Cisco network kit to provide private circuit point to point connectivity and I wonder if someone could give me a little guidence.
The customer is shortly to implement a new 100Mb Metro Ethernet link to connect two of their branches. They initially intend to use the link for data only traffic but eventually will want to route VOIP traffic across the link so bandwidth management and QoS will be essential components. It is unlikely that further links will be added to this link so built in expansion of the chosen routers may not be required.
Budget will be an issue on this so I would appreciate any advice or recomendations.
Thanks
J.

Hello James,
I think it would be better to get in touch with your Cisco Account Team as this question cannot be answered on a forum post.
Thanks,
Karim

Metro Ethernet implementation questions

I am planning a Metro Ethernet upgrade for a network I manage. This is the first time I’ve implemented Metro on any network. I’m looking for some suggestions and answers to a couple questions regarding this upgrade.
The current network is Hub and spoke connected by copper lines to 17 different locations from a DS3 @ our HQ. HQ also has a DS3 to the internet which the branch locations go out for internet. At our branches we have a private and public network on different subnets. Each branch location has either a T1 or bonded T1 connected to a Cisco 2801 router then to Netgear PoE managed switch(s).
The upgrade of the DS3 for internet is going to 100 meg. The data side will also be 100meg at HQ, 10meg to our small locations and 100meg to the large.
My question is what do I need to be aware of on our existing network that must change to get this working?
1)      Will I simply go from the layer2 Metro Switch to our router?
2)      Should I remove the router and go directly to the Netgear switch?
3)      Do I need to VLAN the private and public networks?
4)      Do I need to change routing tables?
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Hi,
I think it would be better to include Cisco Account Manager/SE for this upgrade, they can guide you better and can come up with LLD for this upgrade, otherwise upgrading your 17 sites without proper planning can cause you serious issues.
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Metro Ethernet (eLan) & Windows

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We have just install a Metro Ethernet (eLan) between 2 locations. It is up and running and I can ping between locations. The issue is when I try to map a server drive on the 10.1.1 network from the 10.21.1 network. Windows returns
"The network path was not found". I can't see any PCs in the network through Windows Explorer. I have tried adding a route statement to the route table, but that didn't help. Network and File Sharing is turned on. When the
PC is in house or on the VPN, it can see all the drives, etc.
Does anyone have any suggestions?
Thanks,
CLM

Hi,
How about your problem now? Did you check DNS server, this problem can be caused by DNS problem.
Roger Lu
TechNet Community Support

Basic:Metro Ethernet and DWDM vs SONET question

Hey, my understanding is that in order to deliver Metro Ethernet solutions, one system must be based on DWDM.
SONET, for example, cannot deliver Metro Ethernetsince that is based on TDM (not Ethernet, duhhh).
If the above is right, so I want to confirm that there is no other technology out there besides DWDM which can deliver Metro Ethernet services for enterprise customers?

Any number of underlying technologies can be used to deliver Metro Ethernet services - DWDM, SONET, pure play Ethernet over metro area fiber, etc.
It's more of an economic (what installed base does the carrier have or able to obtain the use of and at what cost) and efficiency (how much of the overall capacity can be feasibly broken into resellable Ethernet services without too much stranded or wasted capacity) question than a technological one. Some technologies lend themselves better to one or the other of those factors thus their dominance in certain markets.
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Is Metro-ethernet Secured ? Compare with FR/ATM

Hi,
Just would like to understand if Metro-ethernet has the same security level as FR and ATM ? Metro-ethernet has broadcast nature and it seems mirroring ethernet frame is much more easier than FR and ATM . Is there any study onto the security issues presented in the Metro-ethernet technology ?
I see a lot of customers doing IPSec on the Metro-ethernet and they don't do this on the FR or ATM links ?
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I have not seen any document, but my understanding is that FR and ATM networks do not have broadcast capability which is an inherent security feature. Sites can communicte only if a VC is configured between them. In metro ethernet, broadcasting is possible and the providers have to implement security to islolate customers by configuring some feature. Since the customers may not trust the level of security provided by the providers, they may choose to run IPSec over this type of access.

SONET Metro Ethernet questions

I was wondering if anyone has had a good/bad experience deploying and working with Metro Ethernet technologies since it is fairly new. I'm planning onto linking a large office 40 miles away to my central office and considered this and PPP OC3 as 2 top choices, I was told I will be able to extend my LAN without any additional hardware, anyone can share their thoughts? reliability?

Hi,
I think it would be better to include Cisco Account Manager/SE for this upgrade, they can guide you better and can come up with LLD for this upgrade, otherwise upgrading your 17 sites without proper planning can cause you serious issues.
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I have installed the agent 10 or 15 times and one installation hasfailed, no error appeared during the installation but I am havinginconsistent issues with my ethernet card not working here and there. Werebooted and can log into Novell client but th

I have installed the agent 10 or 15 times and one installation has failed, no error appeared during the installation but I am having inconsistent issues with my ethernet card not working here and there. We rebooted and can log into Novell client but the login prompt did not appear for ESM client or the icon was not in the systray. Everything seems to work, besides at times (a couple times today) it terminates his ethernet card/connection. I would re-image his computer but he has several applications and it would take several hours, so I am hoping someone has an idea to fix this issue. So I was trying to figure out why he did not get the prompt to login and why it's not in the systray and it appears to not have completed the install? I checked the add/remove programs, its not listed within their, I also checked the registry and found nothing for endpoint within their, but the files are within c:\program files\novell\zenworks endpoint security.
I have also tried uninstalling it but that fails due to it "not being installed", and it will not reinstall over itself either.
I did notice that stuninstdrv.exe is running in task manager. Any help would be great...
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Thanks,
Andy

If you are searching the registry, check for the "Senforce" string. It should be at HKLM\Software\Senforce
Try running the install program for the ZSC with the following command line:
setup.exe /V"STUNINSTALL=1"
If you've specified an uninstall password, try this one instead:
setup.exe /V"STUNINSTALL=1 STUIP=password"" (please note the double quote at the end)
Let me know if that helped you.
Daniel
>>>
From: Andy_DeWees<[email protected] du>
To:novell.support.zenworks.endpoint-security-management
Date: 2/5/2009 12:52 PM
Subject: I have installed the agent 10 or 15 times and one installation hasfailed, no error appeared during the installation but I am havinginconsistent issues with my ethernet card not working here and there. Werebooted and can log into Novell client but the login prompt did not appearfor ESM client or the icon was not in the systray. Everything seems towork, besides at times (a couple times today) it terminates his ethernetcard/connection. I would re-image his computer but he has severalapplications and
I have installed the agent 10 or 15 times and one installation has failed, no error appeared during the installation but I am having inconsistent issues with my ethernet card not working here and there. We rebooted and can log into Novell client but the login prompt did not appear for ESM client or the icon was not in the systray. Everything seems to work, besides at times (a couple times today) it terminates his ethernet card/connection. I would re-image his computer but he has several applications and it would take several hours, so I am hoping someone has an idea to fix this issue. So I was trying to figure out why he did not get the prompt to login and why it's not in the systray and it appears to not have completed the install? I checked the add/remove programs, its not listed within their, I also checked the registry and found nothing for endpoint within their, but the files are within c:\program files\novell\zenworks endpoint security.
I have also tried uninstalling it but that fails due to it "not being installed", and it will not reinstall over itself either.
I did notice that stuninstdrv.exe is running in task manager. Any help would be great...
Windows xp sp3
ESM 3.5.154
Thanks,
Andy

Suggest No. of routers in a single metro-ethernet Vlan

Hi,
Just would like to know if there is a recommended no. of routers to put into a single metro-ethernet vlan. The local Metro-ethernet provider suggest 10 routers per vlan but I think 30-50 would be OK ?

This question is like how many nodes can you put into a VLAN. For an answer to be given your traffic types would need to be known. How chatty are your routers? Are you bridging? What type routing / bridging traffic (non-unicase) might you have on the wire? Baseline data from your environment is important to answer this question. There is no hard fast recommendation for this just as there is none for numbers of nodes in a VLAN or router is an OSPF area. This is completely dependant on your environment.
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VPLS and H-VPLS w.r.t Metro Ethernet

Can someone please explain me VPLS and H-VPLS as to how it can be used in a Metro Ethernet Environment????Any diagramatic explanation will be highly appreciable...
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NISHA

Thanks a lot for the presentations Harot...
As I'm a bit new to MPLS technology, I have some doubts in my mind so far Layer 3 VPNs are concerned. Let's consider a typical Scenario :
CE-->PE-->P-->P-->PE-->CE....
Could u pls tell me where MP-BGP runs (whether in PE to P or PE to CE b'coz somewhere i read the protocol used between PE-CE is MP-BGP and that's why I'm confused) and what is it's purpose. So far I know MP-BGP is run in order to make the VPNv4 routes unique i.e IPV4+VPNv4. I would highly appreciate ur feedback if u explain the layer 3 concept entirely protocol wise...i.e IGP, MP-BGP in a MPLS domain. What I know so far is CE-PE protocol can be anything right from static to BGP. P-PE is MP-BGP.
Kindly pl. correct me wherever I'm wrong...
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Best way to detect failure in Metro ethernet networks

Hello ,
I am working for a well known provider and I am currently migrating one of my client from Frame-relay to Metro-ethernet link .
I am actually looking for advices on what sort of mechanism to implement to detect a failure in the ME parth .
As you probably know , failure on one of the links might cause the CE-SWITCH-PE interfaces to stay up/up and the network will not neceseraliy start converging .
So far I have implemented BFD along with IP SLA route tracking , I am happy with BFD but the IP SLA is acting "weird" .
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thanks ¨
T

Hello Thomas,
From what i have seen BFD is best bet as it allows to relax the L3 protocols timers ( BGP / any other protocol used between CE- PE ). Another option is to have gre tunnel between the PE - CE link and track this tunnel interface.
Regards,
Shreeram

Alerts for metro ethernet link

Hi,
Kindly let me know " How to enable alerts for metro ethernet link"
Thanks..

Hello Gureshi,
they are probably referring to OAM, CFM and other mechanisms to detect link or service failure in metro ethernet scenarios
see
http://www.cisco.com/en/US/docs/switches/metro/me3400e/software/release/12.2_52_se/configuration/guide/swoam.html
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Metro Ethernet Design question

Hello,
I was wondering how service providers guarantee their security protection in the Metro Ethernet model, especially when Internet is one of the applications used over the Metro network.
For example: The customer edge switch (3550) is connected directly to the service provider aggregation layer(either Cisco Catalyst 4500 and 6500 Series switches ) .
In the network core, Cisco 12000 or Cisco 7600 Series routers.
So where is the security devices in this architecture, where is the firewalls, the IDS/IPS, that protects the service provider core from any threats.
Providing the customer with Internet in Ethernet switching technology the service will put the provider in a vulnerable position.
Am I thinking wrong here?

Hi
The CE will be hardened using storm control both multicast as well as broadcast on the ports where the end users are connected.
About the accesiability between the other users who are connected on the ports of same switches you have switchport security coded which will take care of the access violation part.
Also the maximum no of MAC address which can be permitted/allowed over the ports.
This inturn will send u a trap and can shut the port if theres any violation detected on those ports..
In the next layer where u say 6500 or 7600 u will have FWSM modules which will be taking care of filtering and other funtionalities which is very much similar to a standalone PIX firewall.
you can have redundandcy or even load balancing with
the FWSM modules over there in the 6500 switches.
And ofcourse the IP addressing schemes deployed would be in private scopes and will have either NAT pools or PAT enabled in the FWSM.
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regds

Metro Ethernet Design With Redundant Head Ends

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We simply need to allow redundanny for our remote locations in the event that one head end were to fail, all of the traffic to/from the remote site would be routed through the head end which is still online.
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Metro Ethernet in RAIL Transportation (MRTS) applications

Dear Sir,
I have a query related to Metro Ethernet technology.
We are into TRANSPORTATION SYSTEMS. We are coming up with a MRTS Project in Mumbai , India. We are at a planning stage at the moment. As per our experience, companies in RAIL MRTS Applications are using SDH technology (MUX and access multiplexers).
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Hi Pankaj
What kinda applications you are going to use and what kinda bandwidth requirement you have in place ?
Also do revert back the number of locations and a bit more onto your topology which mite help to get back with our suggestions..
regds

Capacity issue on Metro Ethernet

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