[isp-bgp] Re: iBGP session across non-BGP routers

[Tycho Eggen <tycho@...]

Hi,

in order to establish a bgp connection,
routing needs to be available for the peer address.
Normaly, when using a direct link, routing is available.
But in this case, you could distribute your topology address space through rip.
Using rip as an igp for next-hop resolution.

An interesting setup would be to include the loopback and link address space in your IGP,
thus knowing full routing of your network and using BGP on top.

By the way, iBGP does not have a hop limit defined as such,
so no need to worry about that. :-)

Tycho

On Thu, Jan 09, 2003 at 03:57:57PM -0800 Brian(bri@...) claimed:
> Yeah you need to have a route to get to the peer ip for the session to
> work.
> 
> 	Brian
> 
> 
> On Thu, 9 Jan 2003, Rahman Isnaini R suTan wrote:
> 
> >
> > Add just add a static route to your bgp neighbor 69.5.128.254 ...
> > Also in vice versa...
> >
> > Rahman Isnaini RsT
> >
> > ----- Original Message -----
> > From: "Michael Loftis" <mloftis@...>
> > To: <isp-bgp@isp-bgp.com>
> > Cc: "Scott Ocken" <sgocken@...>
> > Sent: Wednesday, January 08, 2003 12:58 PM
> > Subject: [isp-bgp] Re: iBGP session across non-BGP routers
> >
> >
> > : sh ip bgp neighbor ?
> > :
> > : I'm assuming you've checked the obvious (you can ping the neighbor router
> > : at the address you're using, etc)
> > :
> > : --On Tuesday, January 07, 2003 8:32 AM -0600 Scott Ocken
> > : <sgocken@...> wrote:
> > :
> > : > I am trying to get an iBGP session between two cisco 7206 routers that
> > : > have some non-BGP routers between them.  The session shows active, but
> > no
> > : > messages are send back and forth between the two ciscos.
> > : >
> > : > Network Diag:
> > : >
> > : >       dr-brief                                        Bulma
> > : >      --------      -----------      -----------       --------
> > : >      | 7206 |      | Wireless |     | Wireless |      | 7206 |
> > : > eBGP-|   RIP|------| router   |-----| Router   |------|RIP   |-eBGP
> > : >      | BGP  |      | RIP      |     | RIP      |      | BGP  |
> > : >      --------      -----------      -----------       --------
> > : >
> > : > The Wireless Routers can only support static and RIP routes.
> > : >
> > : > The iBGP session config for both ciscos:
> > : >
> > : >
> > : > dr-brief:
> > : >
> > : >  neighbor 69.5.128.254 remote-as 26793
> > : >  neighbor 69.5.128.254 description Link to Bulma
> > : >  neighbor 69.5.128.254 ebgp-multihop 10
> > : >  neighbor 69.5.128.254 version 4
> > : >  neighbor 69.5.128.254 next-hop-self
> > : >
> > : > bulma:
> > : >
> > : >  neighbor 69.5.128.253 remote-as 26793
> > : >  neighbor 69.5.128.253 description Link to Dr Brief
> > : >  neighbor 69.5.128.253 ebgp-multihop 10
> > : >  neighbor 69.5.128.253 version 4
> > : >  neighbor 69.5.128.253 next-hop-self
> > : >
> > : > I tryed the ebgp-multihop 10 to see if i could make connect through the
> > : > wireless routers.
> > : >
> > : > Any help would be great.
> > : >
> > : > --
> > : > Scott
> > : >
> > : >




> > :
> > :
> > :




> >
> >




> >
> 





-- 
Tycho Eggen             (Unix|Network|Social) Engineer
BOFH/NCIA/NOFH          tycho@...
"Don't worry over what other people are thinking about you."
"They're too busy worrying over what you are thinking about them."