[KLUG Members] load balancing router

[Adam Tauno Williams]

>My company currently has two cable modems.  One of them is currently
>dedicated to our mail server and the other is hooked up to a squid
>proxy server to provide internet access.
>In a few weeks our mail server is going to be decommissioned as we move
>the entire corperate mail structure to a central Exchange server run out of
>our corperate HQ (not my decision there).

Ick.

>Anyway.  We've got these cable modems till a least the middle of next
>year on contract so I was thinking of trying to hook both cable modems in to
>my Squid server and configuring it to do some load balancing and increasing
>our overal capacity.
>Having never attempted something like this before I was wondering if
>anyone has done something like this and could offer some suggestions as far
>as where to look for info and what modifications need to be made to the
>kernel and networking configuration to take advantage of the second pipe.

I assume each cable modem has a diffrent IP? 

Are you using any routing protocols?

Are you privately numbered internally (using IP NAT/Masq)?

Are the cable modems plugged directly (via cross-cable) to NICs in hosts or into
a hub/switch?  If the modems are plugged into a switch does the switch support
VLAN?

Systems and Network Administrator
Morrison Industries
1825 Monroe Ave NW
Grand Rapids, MI. 49505