configuring a ethernet interface with 2 different ip addresses

[ccurtin]

Hi Hope someone can help.. I have a 3640 router with 2 ethernet modules in it (one port per modules) and running ios 12.2.3.. we are in the process of changing our internal ip addresses.. What we are looking to do is run 2 ip addresses on the internal interface (original ip and the new ip) until we cut everyone over. Can this be done with ios and how..

thanks

Christopher Curtin

christopher.curtin@oag.state.ny.us

[jasyoung · Accepted solution]

Configure the second IP address on your Ethernet interface with "ip address 1.2.3.4 255.255.255.0 secondary". The "secondary" keyword allows it to coexist with the primary address on that interface. You can have an arbitrary number of secondary IP addresses on a given interface.

[ccurtin]

perfect.. Thanks for your help..