[isp-bgp] Re: iBGP routing issues...

[James <haesu@...>]

On Tue, Aug 24, 2004 at 08:37:22AM -0400, Chris Hale wrote:
> Scenario:
> 
> Internet A --- > EBGP -- > Router1 --- > RIPv2 --- > Router 2 --- > RIPv2
> --- > Router 3 --- > EBGP --- > Internet B

Are you redistributing internet bgp routes into router 2? otherwise router2
won't know where to go, or can cause routing loops. reocmmendation is to run
ibgp on router2 as well. redistribution is usually a bad idea.

> 
> Internet A feed is DS-3, getting full routes to Router 1.  Internet B feed
> is dual T-1, getting default only to Router 3.  Router 1 and Router 3 are
> meshed with iBGP.
> 
> Issues:  We?re getting full routes at Router 3 via iBGP from Router 1, but
> they?re getting installed into the routing tables as directly connected

not sure if i follow that part.. 

> routes, with a next hop of the /30 from Router 1.  Next hop is inaccessible:

probably b/c nexthop is not reachable

do a 'sh ip bgp x.x.x.x' where x.x.x.x is anything out on the internet (e.g. 3.0.0.0)
and what is the nexthop ? 66.203.94.x? and also do sh ip route on the next hop address
as well.. that should help debug.

-J

-- 
James Jun                                            TowardEX Technologies, Inc.
Technical Lead                        Network Design, Consulting, IT Outsourcing
james@...                  Boston-based Colocation & Bandwidth Services
cell: 1(978)-394-2867           web: http://www.towardex.com , noc: www.twdx.net







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