[c-nsp] Advertising private network in iBGP

[Stephen J. Wilcox]

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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> > 
> >
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