should all IBGP neighbours have all EBGP paths?

From: Darren Hosking (dhosking@xxxxxxxxxxxxxxxx)
Date: Mon May 21 2001 - 00:44:53 GMT-3

   
I have 2 BGP routers connected externally to the same AS and internally to
each other using IBGP. The local preference is set to prefer one link over
the other. All paths are visible on the non-preferred router (shows both
paths out with the other as preferred), however, the router with the
preferred path to the ISP only shows the paths it knows about and not the
paths via the other link.

Is this correct? Don't both need all paths or are they exchanged when the
preferred path is no longer available (could be a lot of traffic)?

I'm using Halabi 1st edition as reference, is the 2nd edition much better
and in what areas (ie should I buy the newer edition).

        Thanks, Darren

The output of sh ip bgp summ and sh ip bgp for one network is shown below.

Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down
State/PfxRcd
10.0.1.1 4 1221 6221 3628 43815 0 0 2d12h 6606
172.24.24.1 4 65000 6626 6313 43815 0 0 13:10:59 6606

BGP table version is 43789, local router ID is 172.24.97.1
Status codes: s suppressed, d damped, h history, * valid, > best, i -
internal
Origin codes: i - IGP, e - EGP, ? - incomplete

   Network Next Hop Metric LocPrf Weight Path
*>i9.3.4.0/24 172.24.24.1 300 0 1221 ?
* 10.0.1.1 250 0 1221 ?

Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down
State/PfxRcd
10.0.2.1 4 1221 43026 26728 37714 0 0 4d01h 6605
172.24.96.1 4 65000 11860 12348 37714 0 0 13:10:26 0
<---?????

BGP table version is 37689, local router ID is 172.24.23.1
Status codes: s suppressed, d damped, h history, * valid, > best, i -
internal
Origin codes: i - IGP, e - EGP, ? - incomplete

   Network Next Hop Metric LocPrf Weight Path
*> 9.3.4.0/24 10.0.2.1 300 0 1221 ?
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