Load balancing with ratio

[Ermal Luçi]

You can use tagging for that with prob rules and then use route-to on tags.
Since PF will use route-to only if the rule when route-to is matched
you can do like

pass bla.. prob 30% ..bla tag ROUTE1
pass bla.. prob 70% ..bla tag ROUTE2

pass bla route-to ($whatever1) tagged ROUTE1
pass bla route-to ($whatever2) tagged ROUTE2

Sorry about the syntax not being correct but you can use the man page
to do that.

I have not tested that but anyway it should work.


> Hi,
>
> pf can do outbound load balancing using route-to and provide  the ext
> interface and gateway ip like { ($ext_if1 $ext_gw1), ($ext_if2
> $ext_gw2) } round-robin. But the algorithm is only round-robin which
> may not be appropriate if the two links are asymmetric, say an  1MB
> line and 256kbps line.
>
> Is there any way to provide some ratio like 1:4 where out of 5
> packets/bytes 4 will be via one link and one via other link?
>
> I have gone through the docs and this feature does not seem to exist
> any where, so if some one can give a starting place to look, where I
> can do some hacking, that would also be fine.
>
> raj
>
>