external router is the presence of VLAN0. Notice in the show ip route out-
put above that VLAN0 is connected via 127.0.0.0/8, which is a diagnostic IP
address. Remember that VLAN0 cannot be accessed by an administrator
and is used to provide support for the communication between the RSM and
the Catalyst 5000 switch.
device. If you want to assign a specific MAC address to a VLAN interface,
use the mac-address command. You may want to configure this option to
enhance the operation of the RSM interface. Here is an example:
switches must be configured correctly with an IP address, subnet mask, and
default gateway. Understand that this has nothing to do with routing
because the switches work only at layer 2. However, the switches need to
communicate with IP through the network. Remember that this will not
affect data that is passing through the switch. You can think of layer 2
switches as being just like any host on the network. To be able to send pack-
ets off the local network, you need to have a default gateway configured.