I have seen several old posts indicating that the switch to FreeBSD 13 in 22.1 would bring ECMP support, but I don't see it listed in the GUI yet. Is this feature available now and just lives behind a tunable or will it be offered as a future point release or is it delayed to a future major release like 22.7 or later?
Thank you in advance for the update!
Specifically I am looking for support of a "resilient ECMP" algorithm for use with BGP via MetalLB as seen in this documentation page:
https://metallb.universe.tf/concepts/bgp/ (https://metallb.universe.tf/concepts/bgp/)
FRR supports all required features and you only need to set multipath in tunables, then its up to the community to test it
So just to confirm would this look like the following:
Tunable: multipath
Description: Enables ECMP
Value: <up to X way ECMP>
I got this from the FFR documentation, but it seems like it is only a build flag not a runtime one.
Do you have any information about selecting a hashing algorithm as mentioned in the MetalLB docs or is that just inherent to ECMP? Apologies if that is a dumb question, I am still kinda a noob when it comes to advanced networking like this.
name is "net.route.multipath" and value to enable is "1".
Note that the routing can fall apart when using multi-wan in this brave new world with multiple default routes we cannot cope with yet from the non-FRR side.
Cheers,
Franco
Thanks Franco! I am just tinkering with now as a hobby, so multi-wan is not something I have to deal with at the moment.
Do you have any information about the hashing algorithm or is that likely not an issue?
The hashing side was handled in this review https://reviews.freebsd.org/D26523
It looks to be RSS compatible (Toeplitz).
Of course things could have changed since this review was merged.
Cheers,
Franco