GaryK

OK guys so can I have two routers and have them happily co-exist? We currently run an ADSL router and everything is just fine. Now we need to interface to BT (well they want to interface to us) and for security purposes they want to come in via an ISDN router. Thing is it means that our file and print server machine effectively needs to be available to both routers, is this possible?

cheers

Gary

dsmith

Its called routing and routers do it just fine.

You need to carefully diagram which subnets are located where, then ensure each router has hs the information it need to see all the different parts - if "BT" are using their own ISDN router (are thay managing some kit on your network ??) they should be able to help.

Assuming you have a single small LAN - at the moment all the device will have your adsl gateway as their "default route". i.e. they simply forward all traffic they know isnt on the local lan to that device - and let it get on with delivering it.

if you introduce another router onto the LAN then the devices BT need to access (call ite device "A") will need to have some extra information - to tell them about this second router. In the simplest setup this would simply be an extra "static route". This would direct the rnage of addresses being used by BT towards this second router - and for that range (and that range only) it overides the default route.

So the device "A" will use the default route (your adsl router) for most things it wants to talk to and the individual static route to the BT router for the BT things it needs to talk to.

Deano