Without floating static routes (at the least) I don't think you can do this. You might do better
with a linux firewall which supports a routing protocol like RIP or OSPF. But you need something
which can a) detect the link down and b) adjust routing tables based on path cost.
The $20 cisco's on Ebay can all do it, but no GUI and many nights reading thick manuals. They also
automatically load-balance equal-cost paths. Combined with your m0n0's would make a decent combo.
But quite a few gotchas depending on how those circuits are provisioned (ethernet pops, vs T1 DSU,
From: Brian Mills [mailto:brianmills at fletcherssolicitors dot co dot uk]
Sent: Thu 2/3/2005 6:06 AM
To: m0n0wall at lists dot m0n0 dot ch
Subject: [m0n0wall] Three offices and three Private Circuits!
We have three offices LS HH and WH. We already have an office LAN extension
from LS to HH. We have just commissioned new circiuts from HH to WH and WH
to LS. I have just bought 3 Soekris 4801's with the extra net ports so each
m0n0wall has 5 network ports.
LS currently has 22.214.171.124/24 and HH has 126.96.36.199/24 and we are planning to
use 91.0.40./24 for the WH office
What I need to configure is the m0n0walls to route between each office and
have redundancy so that if a link goes down, m0n0wall will reroute the data
"the long way round" so that one LAN extension failing will not disrupt the
network. It would also be nice to distribute the data between the
connections to increase bandwidth. I am familiar with m0n0wall as we
currently use it to firewall our WAN internet and to route between LS and HH
and uses traffic shaping to ensure VOIP calls between LS and HH work
smoothly. Do I need to set up VLANS or what?? Any help appreciated as I
cannot get my head round this!
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