[c-nsp] route-target import on non-leaking PEs

[Jason Lixfeld]

On 2012-12-13, at 4:29 AM, Adam Vitkovsky <adam.vitkovsky at swan.sk> wrote:

> Using common RD in a vrf is asking for trouble if route-reflection is used.
> 
> Let's say you have two PEs advertising default for vrf inet -if you use RRs
> to spread the routes throughout the backbone -RRs will only advertise one
> (best path)default route to all PEs. 
> Now with unique RD per PE RRs will consider default form each PE as a unique
> route sending both to all PEs. 
> Than you are ready for fast convergence. 
> adam

Hold on, are you saying that within a single VRF, you can actually use more than one RD?

Like:

! PE1
!
ip vrf inet
rd 1:1
route-target import 1:1
route-target import 1:1
!
ip route vrf inet 0.0.0.0 0.0.0.0 192.0.2.1 null0
!
router bgp 1
address-family ipv4 vrf inet
redistribute static
network 0.0.0.0
!

! PE2
!
ip vrf inet
rd 1:2
route-target import 1:1
route-target import 1:1
!
ip route vrf inet 0.0.0.0 0.0.0.0 192.0.2.1 null0
!
router bgp 1
address-family ipv4 vrf inet
redistribute static
network 0.0.0.0
!