[c-nsp] ignoring bgp learned route?

[matthew zeier]

I'm trying to anycast 10.10.223.0/24 from two sites.  One site (SJ) also 
announces the aggregate 10.10.208.0/20.  Each site is behind a seperate AS.

In SJ, the /24 is statically routed on the core routers to a connected 
interface.  All OSPF speakers see that route correctly.

The border routers see the BGP learned from from the other site and not the 
OSPF learned route.  I want these routers to ignore the BGP learned route and 
announce it on their own and use what they hear from OSPF.

What's the best way to accomplish this?  prefix-list/filter-list on each ebgp 
neighbor denying that route?