BGP : community no-advertise Vs no-export

From: Jeff Mullan (jmullan78@gmail.com)
Date: Tue Mar 13 2007 - 17:23:23 ART


Folks,
If I have a scenario like this :

R1--R2--R3

R1 AS 100
R2 AS 200
R3 AS 300

R1s loopback say, 1.1.1.1/24 is being advertised via BGP to R2. If the task
says " make sure R2 doesnt advertise it to any of its peer and make this
change on R1" we will go ahead and set community to this route on R1. My
question is, here, on R1 both no-export/no-advertise will do the trick.
However, since there are no iBGP neigbours peering with R1, no-export will
do the best solution. What do you guys think from exam perspective ? Will I
loose points using no-advertise here ?

Please note, task says " R1 should not advertise this to ANY PEER " but then
we dont have any iBGP peers too .
Thanks,
-JM



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