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BGP: aggregation with suppress-map

ameen.ahmed
Beginner
Beginner

Dear Friends,

I'm facing a problem with bgp suppress-map command.

---R1<-------->R2<------->R3---

I've configured loopback in R1 as below,

interface Loopback1
ip address 20.10.10.1 255.255.255.252
!
interface Loopback2
ip address 20.10.10.5 255.255.255.252
!
interface Loopback3
ip address 20.10.10.9 255.255.255.252
!
interface Loopback4
ip address 20.10.10.13 255.255.255.252
!

Configuration on R2,

router bgp 222

!

- - - -

!
aggregate-address 20.10.10.0 255.255.255.0 suppress-map xyz
!

access-list 20 permit 20.10.10.12 0.0.0.3
access-list 20 deny  any
!
route-map xyz permit 10
  match ip address 20

!
-------------------------         -----------------------------         ------------------------

As per the above configuration, I'm expecting R3 to show all routes except 20.10.10.12/30 in bgp table & routing table with a summary route pointing to 20.10.10.0/24. However, what I can see in R3 is, only a summary route, that too, 20.10.0.0/16.

Anyone know the reason pls?

1 Accepted Solution

Accepted Solutions

Hi,

R2 can't aggregate as it hasn't got any prefixes for the loopbacks in its BGP RIB.

Can you do sh run | s bgp on R1

Regards.

Alain.

Don't forget to rate helpful posts.

View solution in original post

4 Replies 4

cadet alain
Mentor
Mentor

Hi,

on R2:

-sh ip bgp

- sh run | s bgp

-sh route-map

-sh ip bgp nei x.x.x.x advertised where x.x.x.x is R3

Regards.

Alain.

Don't forget to rate helpful posts.