[c-nsp] BGP Path Selection and next-hop reachability (IGP vs BGP)

[Gert Doering]

Hi,

On Sat, Dec 01, 2012 at 10:37:36PM +0000, Oliver Boehmer (oboehmer) wrote:
> Ack.. BGP in IOS will use whatever valid route to resolve the next-hop,
> including a BGP route (which could be perfectly valid in some specific
> scenarios). 
> You need to configure selective address tracking to avoid this to happen.
> With an appropriate "bgp nexthop route-map .." config, for example only
> considering loopbacks or only OSPF or connected routes, BGP would consider
> 5.5.5.5 unreachable, and ignore this path for the best-path calculation.

Mmmmh.  This sounds like interesting stuff, but unfortunately, my Google-fu
is failing me today - all I turn up is the normal "set ip next-hop..."
stuff inside "neighbour 1.2.3.4 route-map foo".

Oli, can you point us to some documentation and/or examples for this?

gert
-- 
USENET is *not* the non-clickable part of WWW!
                                                           //www.muc.de/~gert/
Gert Doering - Munich, Germany                             gert at greenie.muc.de
fax: +49-89-35655025                        gert at net.informatik.tu-muenchen.de
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 305 bytes
Desc: not available
URL: <https://puck.nether.net/pipermail/cisco-nsp/attachments/20121202/ad65d1ae/attachment-0001.sig>