FRRouting and OSPF ECMP

[npiersma]

Hi all,

We've been using OPNSense for quite some time and are very happy with it. So we are now looking to take it to the next level. We are looking into a solution to make two 1Gb (in the future 10gb) leased lines passive / passive vs active / passive by using OSPF equal cost routing.

From the pfSense forum we found that this is possible for pfSense by recompiling FRRouting;

"I'm one of the maintainers of FRR and was asked about this, from the output I was given pfsense compiles FRR w/out any ecmp settings so the ecmp defaults to 1. If you want a higher value FRR needs to be recompiled with --enable-multipath=X where X is the desired max ecmp allowed."

Now we have two questions;
1) does the current opnsense support equal multi path routing (so we can utilize both paths)
2) any recommendation resource wise that we should take into account (cpu, memory, etc?)

BTW, we would be having two carp/synced devices on the east-side and two carp/synced devices on the west-side with two leased lines connecting on layer 2 on each site.

Any tips or recommendations are welcome.
Niels

[mimugmail]

"I'm one of the maintainers of FRR and was asked about this, from the output I was given pfsense compiles FRR w/out any ecmp settings so the ecmp defaults to 1. If you want a higher value FRR needs to be recompiled with --enable-multipath=X where X is the desired max ecmp allowed."

You quote is incomplete:
https://forum.netgate.com/post/828606

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