how do i group multiple global ip addresses on a single network iterface?
 

im trying to increase the number of ip addresses that can be routed through a network card, that links a linux router to a remote gatway to the internet. please help, its urgent!!:newbie:

Not sure if that's what you're asking for, but you can add more IPs to one ethX using something like
ifconfif ethX:0 xxx.xxx.xxx.xx
ifconfig ethX:1 yyy.yyy.yyy.yyy
and so on.

yes, but there was heavy degradation in traffic when i did that. what else can i do?

You need to make sure that the routing table looks correctly.