[c-nsp] BGP transit selection from source customer network

[Alexandre Durand]

Hi,

I was wondering if any of you had alerady the experience of source 
routing tarffic over multihomed network based?

We run a network with several ISP and peering that provide internet full 
routing table and we want for specific network bloc to be routed through 
one of our dedicate cheap transit ISP, but leave others on the same 
router to be routed via others ISPs. we run full meshed IBGP and 
multi-home transits or peering.

I might have found 2 solutions and use PBR or VRF but I don t know how 
to implement them yet. VRF looks nice but I may miss transit redundancy. 
Let s say I create a specific vrf for this ISP, others ISPs remain in 
the global routing table, if this provider is not availaible, the 
traffic is no longer routed out the others ISPs and also I can t share 
and send traffic over peerings...

Is there any doc or guide for such solution that I can use so I can work 
on the appropriate solution and configuration and adapt it to our needs 
and network specifications?

-- 
Alexandre DURAND
TAS FRANCE
WTC 1-K, 1300 route des Crêtes
06560 Valbonne Sophia Antipolis
Phone :    +33 (0)4 92 94 56 93
Fax   :    +33 (0)4 92 94 33 99
Web:       http://www.tasfrance.com
Email :    alexandre.durand at tasfrance.com
peering:   http://as8554.peeringdb.com