I know this works on a router but not sure about a switch On a router you need to add a secondary address to the interface i.e. int <interface> add ip address <address> <mask> secondary ******** Hi, In a Cisco switch, you can't configure 2 ip addesses, it is only possible on a router in which you can configure sub interfaces. This is being used in intervlan routing and frame relay configuration. ********************* This, of course, depends on the switch in question. Some of them have routing capabilities, in which case the switch can actually have secondary addresses on a port - either multiple (i.e. secondary) addresses on a VLAN definition, or by defining a port on the switch as "no switchport", and configuring the switch interface port like you would a router (4506, 6509, 3750, and presumably many more have this capability).

I know this works on a router but not sure about a switch On a router you need to add a secondary address to the interface i.e. int <interface> add ip address <address> <mask> secondary ******** Hi, In a Cisco switch, you can't configure 2 ip addesses, it is only possible on a router in which you can configure sub interfaces. This is being used in intervlan routing and frame relay configuration. ********************* This, of course, depends on the switch in question. Some of them have routing capabilities, in which case the switch can actually have secondary addresses on a port - either multiple (i.e. secondary) addresses on a VLAN definition, or by defining a port on the switch as "no switchport", and configuring the switch interface port like you would a router (4506, 6509, 3750, and presumably many more have this capability).