From: Angelo De Guzman (ghie_pogi@xxxxxxxxx)
Date: Mon Aug 26 2002 - 04:16:03 GMT-3
R5 in AS 1 ----- R4 in AS 1 ----- R1 in AS 4
| |
| |
R3 in AS 3 ------R9 in As 3
R3 and R9 are configured to send the community
to the EBGP peers.
here is the config for both R3 and R9.
route-map removespecific permit 10
match ip address 101
route-map removespecific permit 20
set community no-export
access-list 101 permit ip 172.16.0.0 0.0.255.255 host
255.255.0.0
R1 is able to get the aggregate route without the
specific routes.
MY QUESTION IS
Do I really need to configure the send-community
attribute
for my IBGP peering in R5???
In the solution it says that the send-community
attribute
should be configured. The reason behind is that, R3 is
performing the same aggregation, R4 will receive the
specific
routes from it's IBGP session with R5. If R5 does not
propagate the "no-export" community to R4, R4 will
advertise the specific routes to external peers.
This archive was generated by hypermail 2.1.4 : Sat Sep 07 2002 - 19:48:37 GMT-3