load balancing with Bird

Mazzy

11/29/23, 9:13 PM

I have the following routes pushed into my edge router

192.0.10.0/32      via 192.168.166.110 on br166 [master01 22:53:55] * (100) [AS64514?]
                   via 192.168.166.116 on br166 [worker_03 22:53:55] (100) [AS64514?]
                   via 192.168.166.114 on br166 [worker_01 22:53:55] (100) [AS64514?]
                   via 192.168.166.115 on br166 [worker_02 22:53:55] (100) [AS64514?]

The neighbours advertize the address 192.0.10.0/32

What I'm trying to achieve is to load balance traffic through all those neighbours. It is still not clear whether it is something possible. For instance in this gist https://gist.github.com/bufadu/0c3ba661c141a2176cd048f65430ae8d it is achieved using the maximum-paths rule but this rule is specific to Ubiquiti Edge Router and I could not find anything similar on Bird.

398

1 + 0

routing

bgp

bird

Score:1

Server

Tomek

11/29/23, 9:40 PM

If I remember correctly, you are looking for merge paths configuration option of the kernel protocol.

Of course this will only work if your OS supports ECMP in FIB.

+ 2

Mazzy

11/29/23, 9:53 PM

Ok I need to try that option. My OS is a Linux machine Debian 11 and it should support that.

Mazzy

11/29/23, 10:12 PM

I have enabled but unfortunately in my case it did not work but @Tomek I think you are right that is the option to use. The only problem is that I have failure to push the routes into the kernel. no idea why though.

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EN: load balancing with Bird

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