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Beginner

possible to have multiple VRF but 1 physical link?

Hello all

suppose in a question asked to configure PE - CE with eBGP for each(under) VRF

 in the PE because we configured VRF it is possible with 1 physical Link

but in other side on CE just we have normal Configuration of any Routing Protocol (in this case BGP)

in CE router is it possible we configured like this:

CE#router bgp 501

neighbor 1.2.3.4 remote-as 500

neighbor 1.2.5.5 remote-as 500

neighbor 1.2.6.6 remote-as 500

.

.

.

PE#router bgp 500

address-family ipv4 vrf A

neighbor 1.2.3.3 remote-as 501

neighbor 1.2.3.3 activate

..

<repeated for other VRFs>

 

suppose we have multiple VRF on the PE(A,B,C) and each of those has a specific IP address

with 1 physical link is it possible we established such that connection between CE and Multiple VRF on PE?

i mean  in which situation we can have multiple

neighbor < ip add VRF GREEN> remote-as 500

neighbor < ip add VRF PINK> remote-as 500

neighbor < ip add VRF BLUE> remote-as 500

on the CE router?

 

Everyone's tags (4)
1 ACCEPTED SOLUTION

Accepted Solutions
VIP Advisor

Re: possible to have multiple VRF but 1 physical link?

Hello


@cisc0.ameer wrote:

Hello all

suppose in a question asked to configure PE - CE with eBGP for each(under) VRF

 in the PE because we configured VRF it is possible with 1 physical Link

but in other side on CE just we have normal Configuration of any Routing Protocol (in this case BGP)

in CE router is it possible we configured like this:

CE#router bgp 501

neighbor 1.2.3.4 remote-as 500

neighbor 1.2.5.5 remote-as 500

neighbor 1.2.6.6 remote-as 500

.

.

.

PE#router bgp 500

address-family ipv4 vrf A

neighbor 1.2.3.3 remote-as 501

neighbor 1.2.3.3 activate

..

<repeated for other VRFs>

 

suppose we have multiple VRF on the PE(A,B,C) and each of those has a specific IP address

with 1 physical link is it possible we established such that connection between CE and Multiple VRF on PE?

i mean  in which situation we can have multiple

neighbor < ip add VRF GREEN> remote-as 500

neighbor < ip add VRF PINK> remote-as 500

neighbor < ip add VRF BLUE> remote-as 500

on the CE router?


Yes it is possible, but you'll need to use vrf enabled sub-interfaces on PE/CE rtrs on the physical interface between them.



kind regards
Paul

Please rate and mark posts accordingly if you have found any of the information provided useful.
It will hopefully assist others with similar issues in the future
Everyone's tags (1)
5 REPLIES 5
Beginner

Re: possible to have multiple VRF but 1 physical link?

sorry for describing too much

on PE possible i know

but how on the CE

we have just one physical connection ? in 1 physical connection can we established external BGP Peering with multiple IP add of toward his  PE router !!!!!

VIP Advisor

Re: possible to have multiple VRF but 1 physical link?

Hello


@cisc0.ameer wrote:

Hello all

suppose in a question asked to configure PE - CE with eBGP for each(under) VRF

 in the PE because we configured VRF it is possible with 1 physical Link

but in other side on CE just we have normal Configuration of any Routing Protocol (in this case BGP)

in CE router is it possible we configured like this:

CE#router bgp 501

neighbor 1.2.3.4 remote-as 500

neighbor 1.2.5.5 remote-as 500

neighbor 1.2.6.6 remote-as 500

.

.

.

PE#router bgp 500

address-family ipv4 vrf A

neighbor 1.2.3.3 remote-as 501

neighbor 1.2.3.3 activate

..

<repeated for other VRFs>

 

suppose we have multiple VRF on the PE(A,B,C) and each of those has a specific IP address

with 1 physical link is it possible we established such that connection between CE and Multiple VRF on PE?

i mean  in which situation we can have multiple

neighbor < ip add VRF GREEN> remote-as 500

neighbor < ip add VRF PINK> remote-as 500

neighbor < ip add VRF BLUE> remote-as 500

on the CE router?


Yes it is possible, but you'll need to use vrf enabled sub-interfaces on PE/CE rtrs on the physical interface between them.



kind regards
Paul

Please rate and mark posts accordingly if you have found any of the information provided useful.
It will hopefully assist others with similar issues in the future
Everyone's tags (1)
Highlighted
Beginner

Re: possible to have multiple VRF but 1 physical link?

Thanks for Your reply

Yes i know sub-interface but the fact is in a Question which i have seen Does Not allow to create Sub-interfaces

this is why i made question on it :( !!!!!!

for PE (suppose we connect that Link to Switch Layer 2

so possible

but CE Router if Doesn't have any Sub-interfaces .....how this problem can be solved ?

yet i'm not reached to an logical solution

 

Everyone's tags (5)
VIP Advocate

Re: possible to have multiple VRF but 1 physical link?

Hi,

If one side router is not having any sub-interface then I don't think there is any possibility without adding any extra device between both devices. 

Another solution for you to route-leak between two VRFs

Regards,
Deepak Kumar,
Don't forget to vote and accept the solution If this comment will make help you!
VIP Advisor

Re: possible to have multiple VRF but 1 physical link?

Hello

 


@cisc0.ameer wrote:

Thanks for Your reply

Yes i know sub-interface but the fact is in a Question which i have seen Does Not allow to create Sub-interfaces

this is why i made question on it :( !!!!!!

for PE (suppose we connect that Link to Switch Layer 2

so possible

but CE Router if Doesn't have any Sub-interfaces .....how this problem can be solved ?

yet i'm not reached to an logical solution

 


Okay then no sub interface so how do you separate the different networks for the sub interfaces of the PE router you have to the networks active on either a L3 device attached to the PE router - so if you cannot do that then I can see no way to perfrom your request 



kind regards
Paul

Please rate and mark posts accordingly if you have found any of the information provided useful.
It will hopefully assist others with similar issues in the future
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