balancing load between 2 proxies

Hi all,

This is my setup:

          [network1]<--{ethernet}--->[network2]
               | |
               | |
           [squid1] [squid2]
               | |
           {128kbps} {128kbps}
               | |
               +------->[provider]<-------+
                             |
                         [squid3]
                             |
                         INTERNET

We currently have two networks connected to the same service provider
at 128 kbps each. I've configured [squid1] to use [squid2] and
[squid3] as parents, [squid2] is configured to use [squid3] as parent
and [squid1] as sibling. Both proxies (squid1 & squid2) were compiled
with ICMP and cache digests options.

[Network2] doesn't really have much traffic than [network1] so I want
to make use of the available bandwidth there. What `tweaking' should I
do on both servers to ensure that they really do balance the load on
the two WAN links?

Thanks!

-- 
francis vidal	university of st. la salle, bacolod city, philippines
. . . . . . .	PGP key available via e-mail / subject: get PGP key
u s l s N E T	tel nos. (+63.34).433.3526 / fax (+63.34).434.0415