ADSL Backup Int. on WAN Router - BGP to ISP

[jason.henderson]

Hi all,

I've got a 2911 with a primary ethernet link to the ISP, with BGP running over it.  There's also an ADSL module in it, which will connect into the same ISP AS.

Question is, how do i configure BGP over the ADSL so that it sits there doing nothing until the primary link fails?  Do i need to setup a new instance of BGP with a different AS on the router or can it sit in the same AS as the primary link?

Thanks in advance,

Jason

[yonpeng]

I think the ADSL is the backup of the ethernet link, you don't need to set up a new bgp instance.

when the ethernet link is down, TCP session for BGP will go through ADSL.