Openbsd box with 2 gateways to internet

[Charlie Root <root@gualeguaychu.gov.ar>]

Hi

I can do it ? I want to have two or three gateways to internet to 
my outgoing traffic share or load balance between them.

I can do it with pf ?

Thanks in advance

roberto


                 ---------------
      gw1  -----|               |
                |               |
INTERNET   -----|   Openbsd     |----/ SWITH / ---- CLIENTS
        gw2     |               |  
                |               |
    gw3    -----|               |
                 ---------------