Failover networking configuration?

[Ben_Tilly@trepp.com]

I am trying to set up an OpenBSD machine with 2 ethernet cards on the
same network, and the ability to failover between them if one goes down.
Unfortunately this network does not have OSPF installed, and it won't
happen for this project.  I understand that VRRP is only available in
commercial products due to Cisco patent issues.

What I am really hoping for at this point is some equivalent to Linux'
channel bonding.  Failing that I could write a daemon that does regular
pings and changes the default route, but that feels like a fragile
kludge.

Any information or suggestions would be appreciated.

Ben