[TriLUG] multiple IP from the same network card?

[John Franklin]

On Wednesday, Jun 18, 2003, at 13:56 US/Eastern, lfwelty wrote:

> How do the virtual interfaces work w/ different subnets if you are 
> connected
> via the same physical interface?
>
> ie. Do you have to be plugged into a switch that can handle different 
> subnets
> on the same interface?

A switch doesn't care.  It's working at level 2 so it does all its 
routing based on the MAC address, not the IP address. Routers, if any 
are involved, would need to know either by discovery or by explicit 
say-so that you're part of both subnets.

For load testing labs there's generally no routers between test clients 
and test servers, only switches.  Big, honkin', high-speed switches.

jf
-- 
John Franklin
franklin at elfie.org
ICBM: 35°43'56"N 78°53'27"W