[plug] Dynamic Routing

[Adrian Woodley]

G'Day Pluggers,
          We have some major changes to our two office networks in the 
pipeline. To facilitate the changes I'm going to need to setup some sort 
of dynamic routing. At this stage I'm thinking OSPF, but I'll outline 
whats going to happen and you can let me know what you think.

Two offices, one in Midland and one in Ellenbrooke.
Both have 512 SDSL from Arachnet, with the potential to have a second 
SDSL installed at each office.
IPsec is run between both offices, linking the networks.
A microwave link will also be established between both offices, however 
to get a good connection it will be routed through the Boss' home in 
Darlington.
VoIP will be used extensively in both offices, using speek.net.au as our 
provider.

The plan at this stage is to dedicate on SDSL to VoIP and one to other 
internet traffic, using the microwave link to provide access to both 
offices (ie Midland gets its data through Ellenbrooke and hosts the VoIP 
connection, Ellenbrooke gets its VoIP through Midland and hosts the data 
connection).

This maybe upgraded to having both VoIP and data connections at both 
offices, with the microwave link providing redundancy.

It would be desirable to have VoIP traffic spill over to the data 
connection when under high load (but not the other way around).

In the event of the wireless link going down, LAN traffic between 
offices will need to be routed over the SDSLs.

And it all has to happen seemlessly. :)

At this stage I'm hoping to have a BFR (Big FreeBSD Router - bet you 
were all thinking something else!) in each office to handle the routing.

I don't want to even think about the proposal to tunnel 802.1Q between 
the offices.

So, which routing protocol?

Regards,
Adrian Woodley
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