[c-nsp] Advertising private network in iBGP

[Stephen J. Wilcox]

what does sh ip bgp 172.22.0.0 show you - is it in the bgp table, does it show 
it as advertised or not?

if you've changed prefix lists/route-maps try removing the network statement for 
two minutes then readding it so that it gets readvertised

Steve

On Thu, 16 Dec 2004, Prit Patel wrote:

> Hi Stephen,
> 
> Its there.
> 
> Regards
> Prit
> 
> 
> On Thu, 16 Dec 2004 12:24:36 +0000 (GMT), Stephen J. Wilcox
> <steve at telecomplete.co.uk> wrote:
> > You must have the bgp network and mask match a route in your igp.. if the route
> > doesnt exist, create one eg
> > 
> > ip route 172.22.0.0 255.255.0.0 null0
> > 
> > STeve
> > 
> > On Thu, 16 Dec 2004, Prit Patel wrote:
> > 
> > > Thanks Marco,
> > >
> > > Finally i tried and its working but one more query,
> > >
> > > When i tried with
> > > network 172.22.0.0 mask 255.255.0.0
> > >
> > > and matching prefix-list and route its not getting advertised.
> > > What would be the problem in this.
> > >
> > > Regards
> > > Tejal Shah
> > >
> > >
> > > On Wed, 15 Dec 2004 15:19:40 +0100, Marco Matarazzo <marmata at libero.it> wrote:
> > > > Hi Prit,
> > > >
> > > > > I m trying to advertise ip block 10.12.5.0/24 & 10.12.9.0/24 in my BGP
> > > > > session but it is not getting advertise.
> > > > >
> > > > > router bgp 100
> > > > > network 10.12.5.0
> > > > > neighbor 2.2.2.2 prefix-list go-out out
> > > > >
> > > > > ip route 10.12.5.0 255.255.255.0 1.1.1.1
> > > > >
> > > > > ip prefix-list go-out permit 10.12.5.0/24
> > > > >
> > > > > But the network 10.12.5.0 is not appering in my advertised routes on
> > > > > this router.
> > > >
> > > > try:
> > > >
> > > > network 10.12.5.0 mask 255.255.255.0
> > > >
> > > > and it should work.
> > > > Since you're omitting the netmask in the network statement, Cisco keeps the
> > > > 'natural' network mask. You don't have a route for the full /8, only to the
> > > > more specific /24, and the route won't be advertised this way.
> > > >
> > > > Cheers,
> > > > ]\/[arco
> > > >
> > > > >
> > > > > Is there any special command required to enable this.
> > > > >
> > > > > Regards
> > > > > Prit
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