Aggreate Routes for eBGP export.

quemlar · Tue Aug 30, 2016 2:47 pm

Hi Folks,

Quick question.
I have 3 eBGP peers same subnets are advertised to all.
I have to aggregate networks for eBGP export.
I created aggregated networks and assigned to instance for peer A and peer B see below, then I noticed I didn't need to create any for Peer C.
My question is, does the aggregate route only need to be configured once and can be assigned to BGP default instance?
Or should I just advertise complete networks manually and not use route aggregation?

/routing bgp aggregate
add include-igp=yes instance="peerA" prefix=XX.XX.35.0/24
add include-igp=yes instance="peerB" prefix=XX.XX.35.0/24

Would

add include-igp=yes instance="default" prefix=XX.XX.35.0/24 suffice.

It's a live network so hesitant to change anything during business hours.
On JunOS I only config the aggregate route once.

set routing-options aggregate route XX.XX.35.0/24

Thanks,
Q.

Altare · Thu Sep 01, 2016 4:39 pm

Do you have multiple instances? You only need to create one aggregate per instance, so if Peer A, B and C are in the default instance, you only need to create the aggregate once.

Aggreate Routes for eBGP export.

Aggreate Routes for eBGP export.

Re: Aggreate Routes for eBGP export.