BGP Community question

From: tycampbell@comcast.net
Date: Thu Jun 10 2004 - 08:32:46 GMT-3


BGP Community question
Based on diagram below

R1
AS111
 |
 |
R2 -----------R4
AS112 AS112
            / |
           / |
          / |
         / |
        / |
       / |

R5 R6
AS112 AS112
 | /
 | /
 | /
 | /
 | /
 | /
 | /
  R7
  AS78

r1 is sending a community to r2 for no-export of a network to r7
r2/r5/and r6 only have one peer which is r4
r4 has route-reflector-client statements for AS112 peers r2/r5/r6

On r1, I configured a route-map with no-export parameters, applied to neighbor statement for r2, and also have a send-community for neighbor r2, on r1 (R1 AS111 only peers to R2 AS112)

on r2, I do a send community to r4

Now, when I checked to see if r7 was getting the routes, it was not, which means the community was successful.

Now, should I still have configured the send-community on r4 to peers R2, R5, and R6, even though I only configured it on R2 and it still works as intended. Just a little confused on this one, as the solution has the send-community statements on r4 for all of r4's AS peers., including a send-community to R2. My solution does work, I tested it last evening. Don't want to do anything that could possibly cost me points on the exam.

Thank you!

Ty



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