BGP failover implementation

[viswa sai]

Hi

I have a IGP(OSPF) and BGP running in my network. At the present, i have a Edge router 7600 running two eBGP peers one with full routing table and other with partial routes

All L3 Switches----> L2-----> Edge router ----------eBGP 1 & eBGP 2

My question is, i am planning to install one more Edge router Juniper Mx480 and want to terminate one of eBGP peer and want to acheive fail over.

How do i implement it.. ?  

[shaps]

when you add the eBGP peer to the new router, both will have a bgp/route table, you could then use ibgp between your two routers and set a local preference out to prefer one over the other or you could leave bgp to decide,  it will most likely use the AS path to decide which peer to route through.  

when one fails bgp will drop its peer after the default time out, think it is 3 minutes,  the remaining router will have all traffic directed out to its peer at this point,  you could speed this up using BFD to detect when the ebgp session is lost.

[viswa sai]

Thanks for the reply.

I have 12 Class C /24 blocks. I am advertising them on both eBGP peers for inbound load balancing.

Right now, all my L3 switches have a default gateway point to the Edge router.  When the new router comes into picture. how does this default routes effects the outbound traffic