Leased Line installed from BT [BTNet] whilst I was away, what is the next step?

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Hi,

BT came and installed a leased line (BTNet) into our premises at work, and left it cable into our offices with a Cisco 1721 router. Now I am used to setting up your common or garden small business/home router, but never dealt with any like a leased line setup before.

I have an IP and subnet from the lovely people at BT

194.73.xx.xx
255.255.255.240

and they mentioned that the router should just hook up to our existing network switches and that the servers etc need to be changed to point to the above ip as their gateway ....

Anyone please just point me in the right direction for this and I'll manage the rest. Cheers.
 
Do you have to configure the router?

If not, I imagine the WAN interface uses one of the WIC slots and the LAN interface is the single 10/100 interface at the back. They should have given you the IP address to use as the gateway and as they said, plug the router into a switch port, connect a server to the same network (it will need a fixed IP address from your range and gateway as IP address from before), configure DNS server addresses, test internet access.
 
The 1721 has an ethernet interface. This is basically when you plug your network in. You shouldn't have to do any configuring on the Cisco box at all.

I would suggest you put your own firewall in between the Cisco and your network, otherwise your servers will essentially be right on the internet with no protection.

Internet - Cisco - Your Firewall - Your LAN.
 
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