minimal EoMPLS config between 2 hosts on same IP net

[mcarbones]

Hi,

the customer has 2 hosts with same IP network and want to move one to another CPD but don't want to change IP addresses. The connection between both hosts will be with a Serial Wan. Don't have MPLS Knowledge.

The connection will be:

HostA---Router---(Serial WAN)---Router---HostB

|----(ISDN Backup)----|

It is possible to have this working with EoMPLS ?

What are the minimal hardware I need ?

Are there any other possibility ?

Thanks in advance,

Kind regards,

Marc

[vikas2903]

Hi Marc,

This can definitely work.EoMPLS is the best in this scenario, and for this, Host A and Host B should be connected to router by either FastEthernet or Gigabit ethernet. You may want to define VLAN to keep multiple host (if needed) in different VLANs, or you can use port mode, in which all the hosts will be in the same LAN. Plz note that Port mode is only supported in 12.0S. Please use Cisco feature navigator to know whether your IOS supports supports Port mode or Vlan mode or both.

Configuration steps are as following:

1) Enable cef

2) Enable routing protocol among PEs and Ps.

3) Enable mpls at global and interfaces level of all the routers.

4) Create loopback on all the routers and make them as the router-id.

5) Enable LDP among PEs and Ps.

6) Create targeted session between PEs.

7) Both CEs(host A and B) are already in the same network, so need not to do anything with them.

Plz note that PE routers's interface connected to CE will not have ip addresses. For VLAN mode, the xconnect need to be issued under sub-interface where as in port mode, it will be in the main interface.

Also it will be great if you can list the hardware & IOS you already have or you are planning.

Let me know if you face any problem.

Thanks,

Vikas

[mcarbones]

Hi Vikas,

thanks a lot for the information.

We are planning to use Remote Office type routers, 1800, 2800, etc.

But, the interfaces will not have IP Address ??? How I will manage the router ?

I've been searching in the Cisco documentation, and didn't find example configs for this 'simple' scenario, do you know where I can found something interesting for MPLS beginners ?

Regards,

Marc

[vikas2903]

Hi Marc,

I hope the router you have listed are the routers in customer network, isn't ?? Are you configuring the PEs also, or you are planning to take services of some ISP. If you are planning to go with some ISP, then it is pretty simple, all you have to do is to configure your routers like you do in any point to point connection. You don't need to bother about MPLS part, that would be done by ISP.

For managing the router, you'll have management port.

When I said, the interface will not have IP address, I meant that the only interface of PE router (facing CE router) will not have IP address.

For more info, you can refer following link:

http://www.cisco.com/en/US/products/sw/iosswrel/ps1829/products_feature_guide09186a008016102a.html

Let me know if still you have any doubt.

Thanks,

Vikas

[johansens · Accepted solution]

MPLS standard L3 VPN's are supported from the Cisco 3600 platform and upwards (though I have it working on C2621, with some restrictions AFAIK..)

MPLS L2 VPN's (EoMPLS etc.) are supported from the Cisco 7200 platform and upwards

(7200, 7300, 7500 and 12000 routers. 3750Metro, 6500, 7600 and 10720 "switches")

You will of course put the management in the global routing-table and have a separate management-link into one of the routers..

But with the routers you have listed, you can't supply a EoMPLS service....

[mcarbones]

Hi there,

thank you very much for the info both of you provided.

Knowing wich are the router models that can provide the L2 VPN servicea and that the customer cannot aford it, now we will implement a more simple solution with bridging as the scenario is very simple.

Thank a lot !!!

Kind regards,

Marc