[LARTC] Load Balancing with Instant Messenger traffic?

[Jared Ballou]

Hi, I have a box set up to distribute load over 4 satellite connections. 
I cannot use Instant Messenger programs with it as it stands, I believe 
that using iproute2, the path to the server is not being locked to one 
interface, so the IM servers are getting user traffic from multiple IPs. 
When I set just one default gateway, IMs work great. When I use the 
scope global/nexthop method of load balancing, IM programs will keep 
disconnecting and needing to reconnect. Is there a way (besides bonding) 
to make IM traffic locked into a certain interface? I'd like to do it 
balanced too since Yahoo webcams take up 30% of the bandwidth here, but 
if I have to I guess I could forward all that traffic out one modem and 
everything else out another. Thanks.