From: gladston@br.ibm.com
Date: Fri May 14 2004 - 16:18:09 GMT-3
Hi,
I think it is a basic question, but could not find it on the Archive.
Router 1 is on AS 124, as router 2 and router 3. R1 peers with R2 and R3. Router R1 is RR. Router 3 peer with router 4 on AS 34. Router 1, 2, 3, and 4 are also on AS 1234. Router 4 peer with external neighbor 7, on AS 777.
Router 777 is advertising net 7.7.7.7. If I configure dampening on R4 for net 7.7.7.7, when the route flaps it is dampened. If I configure dampening on R3 for net 7.7.7.7, when the route flaps it is not dampened and it is ok because Cisco says external routes are not dampened if received from iBGP.
Now, I am not sure about this:
Router 1 is advertising 1.1.1.1. If I configure dampening on R2 for net 1.1.1.1, when the route flaps it is not dampened. I did not find a statement saying that internal networks from iBGP peers should be dampened, but I concluded it based on the statement "external routes are not dampened if received from iBGP". (I concluded that if external routes are not dampened, internal routes are dampened, but would like to check it).
Based on the result of the lab I would say that internal networks from iBGP peers are not dampened. Is it corrected or should I tried on more time?
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