aggregate route to bgp neighbors

[Roel Reyes]

Hi all, 

I have two upstream, i tried to aggregate my routes to both of them, I'm not sure why my aggregate routes is not sent to my other upstream. 

if you can see 1st neighbor is the one who haven't received the aggregate /22 routes

[Harold Ritter]

Hi Roel,

Do you have an outbound route-map or any kind of filter towards this peer? This could explain why you are not seeing this aggregate being advertised to this peer. It is hard to tell without more information.

Regards,

[Roel Reyes]

i have this config only on my neighbors

[Harold Ritter]

Can you please do a "show bgp ipv4 uni <prefix> <prefix length>"for the aggregate route and post the output here. Can you also post the bgp configuration for the router sending the aggregate route.

Regards,

[Roel Reyes]

This router Originate the routes and also this is the one who originate and send the aggregate routes. 

address-family ipv4
network 1xx.1xx.8x.0 mask 255.255.252.0   <<<<<<<<<<<<<<<<<< /22
network 1xx.1xx.8x.0 mask 255.255.255.0   <<<<<<<<<<<<<<<<<< /24
network 1xx.1xx.8x.0 mask 255.255.255.0   <<<<<<<<<<<<<<<<<< /24
network 1xx.1xx.8x.0 mask 255.255.255.0   <<<<<<<<<<<<<<<<<< /24
network 1xx.1xx.8x.0 mask 255.255.255.0   <<<<<<<<<<<<<<<<<< /24
aggregate-address 1xx.1xx.8x.0 255.255.252.0 suppress-map SuppressMap1xx.1xx.8x.0
neighbor 2xx.xx0.1xx.x3 activate
neighbor 2xx.xx0.1xx.x3 soft-reconfiguration inbound
neighbor 2xx.xx0.1xx.x3 route-map 1LocalPref in
neighbor 2xx.xx0.1xx.x3 route-map 1PathPrepend out
neighbor 2xx.xx0.1xx.x3 filter-list 9 in
neighbor 2xx.xx0.1xx.x3 filter-list 3 out
neighbor xx8.1xx.2x.x5 activate
neighbor xx8.1xx.2x.x5 soft-reconfiguration inbound
neighbor xx8.1xx.2x.x5 route-map 2LocalPref in
neighbor xx8.1xx.2x.x5 route-map 2PathPrepend out
neighbor xx8.1xx.2x.x5 filter-list 10 in
neighbor xx8.1xx.2x.x5 filter-list 1 out
exit-address-family
!
ip forward-protocol nd
!
ip as-path access-list 1 permit ^$
ip as-path access-list 3 permit ^$
ip as-path access-list 9 permit .*
ip as-path access-list 10 permit .*
!
!
ip route 1xx.1xx.8x.0 255.255.255.0 Null0 tag 777
ip route 1xx.1xx.8x.0 255.255.255.0 Null0 254 tag 777
ip route 1xx.1xx.8x.0 255.255.255.0 Null0 tag 777
ip route 1xx.1xx.8x.0 255.255.255.0 Null0 254 tag 777
!
ip prefix-list AllowSpecific-1xx.1xx.8x.0 description allow /22
ip prefix-list AllowSpecific-1xx.1xx.8x.0 seq 10 deny 1xx.1xx.8x.0/24
ip prefix-list AllowSpecific-1xx.1xx.8x.0 seq 15 deny 1xx.1xx.8x.0/24
ip prefix-list AllowSpecific-1xx.1xx.8x.0 seq 20 deny 1xx.1xx.8x.0/24
ip prefix-list AllowSpecific-1xx.1xx.8x.0 seq 25 deny 1xx.1xx.8x.0/24
ip prefix-list AllowSpecific-1xx.1xx.8x.0 seq 100 permit 0.0.0.0/0 le 32

!

route-map SuppressMap1xx.1xx.8x.0 permit 10
match ip address prefix-list AllowSpecific-1xx.1xx.8x.0

[Harold Ritter]

Hi Roel,

I can see from looking at the configuration portion you sent is that you are using a different outbound route-map for each neighbor and maybe you are doing some filtering in one that you don't in the other.

You could also try doing a "clear ip bgp <neighbor address> soft out" for the neighbor for which you do not see the aggregate route and see if it fixes the issue.

Regards,

[Georg Pauwen]

Hello,

on a side note, you don't need the network statement for the aggregate:

address-family ipv4
no network 1xx.1xx.8x.0 mask 255.255.252.0 <<<<<<<<<<<<<<<<<< /22