[c-nsp] BGP failover for two traffic types

[Rodney Dunn]

Look in to PBR with either router tracking or one of the other IP SLA 
event types to monitor for the link going down.

Rodney



Adam Greene wrote:
> Hi,
> 
> I have a CE router doing eBGP peering with two of my PE routers over 
> distinct WAN circuits. The CE router services two netblocks on its LAN 
> interface: one is for VOICE, the other (secondary IP address) is for DATA.
> 
> I want the customer's DATA traffic to flow to/from PE1 by default, and 
> voice traffic to flow to/from PE2 by default. In the event of an outage 
> on one of the circuits, I want all traffic to flow over the circuit 
> that's still up.
> 
> I already know how to manipulate the traffic inbound to the CE router in 
> this way, using conditional BGP advertisements. However, I can't figure 
> out how to make the customer's outbound traffic prefer one link or 
> another depending on whether it's DATA or VOICE, except by using 
> route-maps, and those don't play nice as far as failing over to a backup 
> link if the primary link is down.
> 
> I've toyed with the idea of trying to use VRF for this application, but 
> I'm pretty new to it and don't know if it's really a viable approach.
> 
> Interested in ideas ... should I attempt a solution based on VRF? Or 
> maybe there is a simpler solution ....
> 
> thanks,
> Adam
> 
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