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.
Hope this helps,
Don

Similar Messages

Metro Ethernet VLANs

Hello!
I've been digging through metroe best practices, but all I can find is ISP points of views on creating a metroe WAN rather than from an internal business standpoint. My company is getting a metroe circuit in two weeks so I'm labbing up a WAN in GNS3 and my configurations aren't working. The MetroE will be a point-to-point connection. The main site will have the MetE circuit going into a Cisco 3750 and the remote site has a 3750 as well. I am going to use 802.1q trunks for the metroe traffic. My problem is I can ping the gateway for the vlan 3 at the remote site (192.168.201.1) from corporate, but I can't ping the PCs. This could be a GNS3 limitation or a screwed up Metro VLAN design all together. Any input here would be much appreciated. Here is the configuration for the Cisco 3750 at corporate:
*output omitted*
vlan 200
name MetE-Point-to-Point
interface fa0/1
description Trunk2MetE
switchport mode trunk
interface vlan 200
ip address 10.10.200.1 255.255.255.252
ip route 192.168.201.0 255.255.255.0 10.10.200.2
Cisco 3750 Remote Site:
*output omitted*
vlan 3
name Comp-LAN
vlan 200
name MetE-Point-to-Point
interface fa0/1
description Trunk2MetE
switchport mode trunk
interface fa0/2-24
switchport access vlan 3
interface vlan 3
ip address 192.168.201.1 255.255.255.0
interface vlan 200
ip address 10.10.200.1 255.255.255.252
ip default-gateway 10.10.200.2
ip route 0.0.0.0 0.0.0.0 10.10.200.1

Correction on the remote site:
vlan 200's ip is 10.10.200.2 not 10.10.200.1 like the config shows.

Integrating Metro Ethernet to DSLAM

Dear friends,
I am very new to Metro Ethernet and currently I am facing a solution problem. The thing is my customer want to deploy a MEtro Ethernet Network, which in turn they should be able to interconnect to a DSLAM network. The specific customer requirements are below, i am getting smoke out of my ears working on this.
1) Deploy a Metro ethernet network and integrate it to DSLAM network
2) Design should be such that customers of my customer (SP) can change his bandwidth limitations. For eg: if the SP's customer wants to have a video conferencing for a few hours then say for some 4 hrs he/she should be able to change the provided bandwidth. The SP should be able to monitor and bill for this.
3) As a section of this Metro Ethernet solution a part should be able to provide video,data,voice and other near future application on EXISTING RJ 11 telephone wire connection at the customer places.
I have only 1.5 yrs experience in networking and that too only on configuring and installing routers,RAS FW switches etc. I have never been to Solution providing and this is the first one. I dont want to lose it. can any one help ???
Pleeeeeeeeease !!!!!!!!!!!!

Hi,
Your requirment seems to be preety simple as far as metro ethernet deployment is concerned.
Suggest you to look for Cisco Service Selection Gateway ( SSG ) feature set on Cisco 72xx,73xx,10K series routers. With SSG coupled with SESM , users have flexibilty of change the bandwidth on the fly and SP can bill him accordingly.
Apart from the requirement of bandwidth change , i would like to make a point that your customer should go for ADSL 2 or 2 + for catering triple play services ( voice,video and data )
As far as metro e network is concerned i would have gig ethernet bandwidth in the backhaul .
If the customer is not so Cisco Savvy , you can look for Juniper SDX platform , which supports COPS !!! ;)
you can reach me a [email protected] for any assitance required .
Raj

Help with setting up Metro Ethernet

Can someone please help and give suggestions and possible configuration options for setting up metro ethernet in the following senario:
Will be setting up ME between headquarters and three remote branch offices. Each remote branch will be provisioned to 10MB, and the headquarters will have one link for the aggregate provisioned to 30MB.
My questions, we will have routers at the remotes, but how will this terminate at the headquarters? Do we connect the one ME aggregate connection to a router, or to a L3 switch? And how do you configure the headquarters devices to separate the traffic? Do you use sub interfaces like in frame relay? Please provide a sample config if possible.
Thanks

HI,
Assume you have 3560 SW at your HQ and where you can terminate the ME circuts.
Configuration in Switch as:
3560SW#sh run int Fa0/5
Building configuration...
Current configuration : 123 bytes
interface FastEthernet0/5
description ***************
switchport access vlan 40
switchport mode access
end
Create a SVI interface at the Router, the configuration is as:
7604-Backbone-RTR#sh run int Vl40
Building configuration...
Current configuration : 119 bytes
interface Vlan40
description *********
ip vrf forwarding 1234-NAME-MESH
ip address xx.xx.xx.xx 255.255.255.252
end
In the above configuration, VRF is applied on Interface to make the pefix unique across the Backbone.
is it here at the remotes where I will configure the "sub-interfaces"?
A. Yes, the case for remote is same as that of HQ.
Pls Rate if HELPS
Best Regards,
Guru Prasad R.

What kind of Metro Ethernet Switchs?

Dear Sir,
We adopted an IP/MPLS network so we need to make expansion. The expansion will be Cisco Metro Ethernet Switches.
What kind of Cisco Switch will be suitable for this purpose ?
Find the attached image for the Network topology so the Core routers is Huawei NE80E and the Edge Router is Huawei NE40E.
Waiting for your suggestion.
Regards.

Hu Hussein!
I worked a lot on ME3750..I can´t recommend this platform! The hardware and sw features are obsolete.
If you do not need MPLS, the ME3400E (E Series!!) supports features like "selective QinQ", wich could be very nice n an metro ethernet network.
http://www.cisco.com/en/US/docs/switches/metro/me3400e/software/release/12.2_58_se/configuration/guide/swtunnel.html
You have only 1GE ports.
I think the ME3600X/3800X should be the choice. You have the features like 3400E and EVC support
http://www.cisco.com/en/US/docs/switches/metro/me3600x_3800x/software/release/12.2_52_ey/configuration/guide/swevc.html
The 3600X by default has enabled the two 10GE ports. The 3800X NO. Check the licensing model (also for scalabiliz, mpls) before you buy...
The features of the platforms are nearly the same.
The 3800X supports larger TCAM, more VRFs,ecc
I never used the 3600/3800 series.The platform is very new. But future proof
..or maybe a 6500 or 7600 platform (if you need port density)...?
Regards,
Thomas

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?
Thoughts and/or suggestions welcome.
Let me know if more information is required to assist in answers.
Thanks

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.
Yasir

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.
you got to have more n more ACLS on all the devices to mitigate the general known worms/virus or their variants in the network applied in applicable points.
regds

Metro Ethernet Design With Redundant Head Ends

We're getting ready to turn up some metro ethernet circuits that were just installed by AT&T. AT&T has provided a VLAN for each remote site (so each site has its own VLAN), and those VLANs are trunked to our head end switches (Cisco 3750 Metro Switches).
I'm struggling with the best design for IP routing. We currently use OSPF on our internal network, and I was going to extend OSPF to our metro solution as well, but I'm not so sure now.
I don't want routing to occur directly between head end #1 and head end #2, we already have redundant paths within our corporate network, and allowing our two head ends to route between each other via our metro ethernet solution is not what we want. However, running OSPF on each of the VLANs which have been provisioned for us would permit routing between the head ends.
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.
Anyone suggestions on the best routing design for this situation would be greatly appreciated. I've attached a network diagram to make things clear. I believe I can also go back to AT&T and request one VLAN that includes all sites if that would simply things. I just need to make sure I can still do our traffic shaping because the remote sites are only 10mbps and the head ends are 1gbps.
Thanks,
-Steve

just at a glance it looks as if you should be able to have stp on and setup 1 site as primary and other as secondary

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).
Could you please suggest , should we go for METRO ETHERNET of SDH Technology.
Are there any players/ any Metro Projects who have implemented Metro Ethernet ( instead of SDH).

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

Comcast Metro Ethernet Setup

We have one customer with one ASA and one 3750 switch in headquater. 6 1801 Routers in 6 branches.
All connected via MPLS/BGP provided by ATT. And it was terminated at one port on 3750.
We plan to replace that with Metro Ethernet Hub/Spoke topology since the customer mentioned each office never talks to each other. Later on we found they have IP phones do need to talk with each other at branches.
Question - can we still use the MetroE service but configure routing to make each office talk with each other and how that would work?? I would assume some routings on 3750.
Any info is appreciated. thanks!
Ben

Hi Ben,
It will work for sure since this is what ( in a much more complex scenario) we are implementing in our company since ab few months. Just take care of defining data and voice subnets as technically unrelated so to be free implementing very flexible and easy to manage routing policies. Is ATT providing L3VPN or what?
Hope to help
Alessio
Sent from Cisco Technical Support iPad App

Metro Ethernet (eLan) & Windows

Hi,
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

Metro ethernet configuration

Months agao I had a 10MB metro ethernet link installed between two of my locations within 3 miles of each other. The link is fiber with a conversion module to copper, 10MB ethernet.
I have the link on one end coming into a fastether port on a cisco 2620 router and the other end on a fastether cisco 3745.
My routing the man like a frame link, each location is on a seperate subnet.
I have not configured either end for IPsec, tunnel, etc.
I have had the line checked by the ISP, but constantly received interface resets,output errors and excessive collisons.
I feel I'm missing something from the configuration.
I have verified my equipment is fine, both fastethers have been changed so my equipment is good.
Any suggestions would be appreciated.

It is related to send a busty traffic to you Ethernet interface and check the duplex and speed for both ends (It should be match).Check any viruses updated from the local Computers. Normally collision will happen when an Ethernet or transceiver cable is too long or when there are more than two repeaters between stations. So if the error is more then automatically the interface is resets. I hope the below link provide you more information.
http://www.cisco.com/en/US/products/hw/voiceapp/ps967/products_administration_guide_chapter09186a0080194668.html
http://www.cisco.com/en/US/products/hw/optical/ps2006/products_installation_and_configuration_guide_chapter09186a00800a9f95.html

Metro Ethernet newbie needs help

Need to configure new 15 site Metro Ethernet network with this physical topology:
x=x=x=x=x=x=x=x
|oooooooooooooo|
X====X-X==x==X
|oooooooooooooo|
x======x======x
x=7604, X=7606
= 2x 10Gb Ethernet
- 2x 1Gb Ethernet
This network will provide metro ethernet services to several customers, but for now we only have one ME-3400G-2CS switch on each site.
I've been reading about Metro Ethernet and MPLS technology for a few days now and I still don't have any clue how I'm going to put all this working together. Can anyone help me?

As a metro Ethernet solution for service providers Cisco has launched a new product âCisco ME 6524 Ethernet Switchâ which is optimized for service provider locations where space and power are at a premium, this 1.5-rack-unit device cost-effectively meets the stringent performance, reliability, and quality of service (QoS) requirements of triple play and VPN services. It enables Gigabit Ethernet access for fiber and copper deployments.
The below URL may help you:
http://www.cisco.com/en/US/solutions/ns341/ns524/ns562/ns577/networking_solution_announcement0900aecd8040bfc5.html
The following URL explains about the troubleshooting, installing, removal and replacement procedures of 7600 series router.
http://www.cisco.com/en/US/docs/routers/7600/Hardware/Chassis_Installation/7600_Series_Router_Installation_Guide/instal.html
The following URL's contains information about how to initially configure the Cisco 7600 series router also about the complete configuration of 7600 series router
http://www.cisco.com/en/US/docs/routers/7600/ios/12.2SXF/configuration/guide/supcfg.html
http://www.cisco.com/en/US/docs/routers/7600/ios/12.2SXF/configuration/guide/swcg.html

DSLAM metro ethernet ring

Dear All
In my one solution I need to connect IP DSLAM and L3 switcheh to form metro ethernet ring.
Will it be possible. Is DSLAM with Gigabit eternet interface is exist, if yes pls suggest the product.
Anand

Hi Anand,
Check this link from Lightreading, it gives some nice information about IP DSLAM vendors and specifications. You can check what is your exact requirement.
http://www.lightreading.com/document.asp?doc_id=74391&site=lightreading
sultan

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

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