[c-nsp] Route selection in VRF

[Oliver Boehmer (oboehmer)]

Felix Bako <> wrote on Wednesday, September 10, 2008 10:00 PM:

> Hey Guys,
> 
> I have two routers each terminating my upstream providers.on each i
> have configured Internet on a VRF and doing ebgp with my providers on
> the the VRF.
> Customers connected to The PEs are importing the Internet VRFs RTs for
> Internet Access.

Do you carry full table in the Internet VRFs? This can be very expensive
as routes are duplicated on the importing PE.

> The two routers are also doing IBP between them so both routers are
> fully aware of each other routes

Not sure I understand this. Aren't the two routers PEs? The iBGP you're
referring to is the "normal" vpnv4 iBGP between PEs?
This could acually be an issue if you have traffic like customer-PE
-(MPLS)-> internet-PE1 -(MPLS)-> internet-PE2 --> Internet where
customer-PE is following the default-route. 

A network diagram could help.

> The challange is traffic from the customers connecting to PEs always
> follows the default route of each Internet PEs and i can only use one
> uplink at a time hence cant load share.

have you investigated iBGP load-sharing (i.e. maximum-paths ibgp 2) to
load-share across two egress PEs?
 
	oli