Dual Homed BGP for failover

Tue Jan 18 20:57:16 UTC 2011

On 1/18/2011 2:05 PM, George Bonser wrote:
> One can take a full feed but filter so only a subset of the routes are
> actually installed.  For example, filter all routes that are more than
> one AS away from the immediate upstream.
>

You should still be careful, as most processors keep a copy of filtered 
routes as well, so while your forwarding table may not increase, your 
route processor memory most likely will.

I haven't checked, but I presume IOS and Junos have a knob to disable 
this feature?

Jack