Have a Cisco router running 12.1 IOS. It has a leased line coming in and then a LAN interface going into the local network. It has three different IP addresses and am told by those that be we need to add another IP address to the interface. This I'm not sure how to do. Have just taken over the technical doing of things. Have been to the Cisco web site and read some things, but it's just not too clear to me. Can login to the router okay and get into enabled area, but whatever I type just doesn't seem to work.
Can someone give the command to add another IP address to an existing interface?