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MPLS VPN SIMPLE VPN EIGRP BETWEEN CE

Posted on 2011-02-22
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Last Modified: 2012-05-11
Hi,
  I was doing a lab on mpls simple vpn last night on gns3 (i do not have the configs to hand). I have attached the network diagram layout.
The config i done was router eigrp 1 process on the core network with LDP protocol and each client using eigrp between the pe-ce routers. I set it that both
client a and b had an overlapping autonomous number for eigrp. Both had an automonous system 2  this was configured with seperate address familys under
the eigrp process 1 . The question is is this supported i.e the same as for eigrp under different address familys i would have presumed it would???
I got the customer a both sites sharing fine. But customer b would not work. The problem seem to lie at the redistributing into bgp or redistribution back into eigrp.
As i was able to see the routes for singular sites on each repective pe router but the pe routers did not seem to be sharing the customer
b  routes. The rd and rtargerts looked fine

110:11 import export for ipvrf customera on both pe
110:12 import export for ipvrf customerb on both pe.

I compared both customera config and customerb config. The only thing i could think it was having problems with the redistribute command
redistribute eigrp 2 been under each address family in bgp and could not figure out which eigrp 2 process it was to use??


Thks,

Eoghan


mpls-diagram.jpg
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Question by:BarepAssets
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harbor235 earned 500 total points
ID: 34961501

Using eBGP is really the way to go, most deployments utilize it.

You can use the same AS number however they must be in the same VRF,. is that what you mean?

Can you post your config?

harbor235 ;}
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by:BarepAssets
ID: 34961617
hi Harbour,
                       I am mainly doing this for pratice for my  ccip exam.  I gave up on the config i dont have it to hand. What i mean i had two seperate vrf 1 for customer a and 1 for customer b + i set them up that both were using router eigrp 1  so same eigrp automous system in seperate vrf's.  I thought this might be a pratical scenerios 2 isp customers using  a  common router eigrp as i.e as 1  

But you have answered my question that the as can not be the same in different vrfs

Cheers
Eoghan
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by:harbor235
ID: 34961695

Well you can use the same AS for different customers, I assumed we were talking the same customer. The problem is do you want different customers to share routing information? you can do that as well importing or leaking routes into a vrf for extranet conenctivity.

MPLS allows customers to operate independantly, one customers is isolated from the other via the RD which makes customer routes unique (so you can even reuse the same address space) and teh RT which is an extended BGP community used to make sure teh correct routes get into the correct VRFs.

I hope this answers your question?

harbor235 ;}
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by:harbor235
ID: 34961720


So routing protocols and routing information can be used over and over again

harbor235 ;}
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