[c-nsp] suppress bgp updates?

[Gert Doering]

Hi,

On Tue, Nov 16, 2010 at 05:06:49PM -0800, Mark Kent wrote:
> The "internal" router redistributes static routes into ospf, 
> so I introduce changes by alternating between:
> 
> internal(config)#ip route 192.0.2.0 255.255.255.0 10.10.10.10
> 
> and
> 
> internal(config)#no ip route 192.0.2.0 255.255.255.0 10.10.10.10

What we do in this situation ("customer brings their own /24 and we're to
annonce it") is:

- null-route the /24
- bgp has "network" statement for the /24
- IGP routing has 2x /25

so the /24 is never changing between "static null" and "whatever else
might be in use" - and if the customer line is up, the 2x /25 will grab
the packets.

This works to keep the external announcement stable, but I agree with you
that somehow BGP still has a number of warts...

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
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