RH5.2: I'd like to ping the IP assigned to eth1 from eth0 (on different vlans), however - use the default gateway, have it get tagged by the switch & route through the network.

Can this be done, or does RHEL say: hey, that's MY IP ... just pass it though myself.

What I've tried:
used GATEWAY=<gw_addr> for each ifcfg-ethX
used GATEWAY=<gw_addr> in sysconfig/network

I've also screwed with route -add to force traffic ... I can ping -I eth0 <eth1's IP> and see the request route, but would like to be this way by default.

Thanks in advance.