FRR multipath-relax issue

[tomli]

Hi all,

I enabled the multipath-relax in frr configuration.
router bgp 1xxx
bgp router-id 192.168.252.1
bgp log-neighbor-changes
bgp bestpath as-path multipath-relax

I can see the configuration is running in frr.

B>* 0.0.0.0/0 [20/0] via 42.x.x.x, lagg0, 02:06:42

• via 118.x.x.x, lagg1, 02:06:42

But the configuration is NOT running in pfsense kernel routing table:-

[2.4.5-RELEASE][root@test.localdomain]/root: netstat -nr
Routing tables

Internet:
Destination Gateway Flags Netif Expire
default 42.x.x.x UG1 lagg0
42.x.x.x/30 link#15 U lagg0
42.x.x.x link#15 UHS lo0

All outgoing traffic use 42.x.x.x as default route only. Please advise.

[heper]

afaik multipath routing is not supported in the kernel. So basically you only get failover when using bgp of other routing protocol.

I think they are working on it for 2.5, but there are/were some issues (check redmine.pfsense.org)

[jimp]

We have RADIX_MPATH and FRR multipath options enabled on 2.5.0 snapshots, but so far feedback from users trying it has not been positive. Very unstable.

[tomli]

@jimp and @heper . Thank you for your information.

One more question. Can pfsense 2.5 solve the frr restart issue when we change (save) the configuration in frr page?

[jimp]

Though I'm not sure what specific issue you are talking about, there aren't any differences in the FRR package on 2.5.0 and 2.4.5-p1 except the 2.5.0 version is compiled with multipath enabled.