From: EA Louie (elouie@xxxxxxxxx)
Date: Fri Nov 16 2001 - 04:18:18 GMT-3
Try doing a traceroute to see where your ping is failing. Post those
results. Also, try your ping/traceroute from AS1 to AS4 and post those
results.
-e-
----- Original Message -----
From: "Thekkethala" <thek@mediaone.net>
To: <ccielab@groupstudy.com>
Sent: Thursday, November 15, 2001 10:49 PM
Subject: A very basic question : BGP
> Just a sudden 'shake-up' in my fundamentals all of a sudden
>
> Here is the clarification. (EBGP links - do they need to be leaked ???)
>
> 1. You have multiple AS's and have EBGP running between them all.
>
> as1 ------->as2----->as3------->as4 (a single router in each AS for
example)
>
> lets say yu configure a loopback address in as1 and leak it into bgp via
a
> network statement in as1.
>
> Now, keeping the config (basic) as is, yu sit on the router on as4 and try
a
> ping back to as1 to this interface. It does no go thru. However all the
BGP
> tables enroute indicate this entry and since they are directly connected
ebgp
> setups, the next hop are there in the ip routing table as well (directly
> connected).I then did a redistribute-connected under the bgp process on
ALL
> the routers and tried again - no luck in reaching the loopback address in
as1
> FROM as4 - however from as2 no problems / as3 and as4 no go at all !!
>
> My Question>
> 1. The eBGP links between routers :
>
> Do we ALWAYS need to consciously redistribute them in BGP setup
> (using either the redistribute-connected or network statement along with a
no
> auto-summary) to enable a ping / traceroute etc .. for ip basically
> ...........
>
> I am sorry if this sounds really elementary ... but am quite puzzled -
what if
> I have a setup involving 50/60 ebgp session (in theory I mean) ....!!!!!
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