BGP when using HSRP

[rgoddard]

Tier 3 multi-homed AS connected to 2 different ISPs.

One 7206VXR will be hot, another in standby (hot connects to both ISPs simultaneously, as does standby; both via DS3)with load sharing between the 2 ISPs off the hot router only. LAN routes are 100% static, no interior protocol running.

Question: If using HSRP with preempt and WAN tracking on the hot router - what's the best way for the standby router to maintain BGP tables to the 2 ISPs (while in standby) without actively routing? Filter lists?

If this is unclear I apologize, but trying to work out these details and appreciate any helpful advice.

[mhussein]

Hi,

Best option is to talk to your upstream providers, chances are they already have some routing policies and communities that may help in this situation. Most providers implement bgp communites and AS_prepends, however MEDs are not necessarily accepted from downstream.

So, if you can verify that the providers will accept MEDs, you can use outbound route-map to increase the metric on the backup router, and an inbound route-map with reduced local_pref. All prefixes should be advertised via both primary and backup routers.

http://www.nanog.org/mtg-0306/smith.html

http://www.nanog.org/mtg-0310/mcpherson.html

HTH,

Mustafa