| Multilayer switching uses inter-VLAN
routing. Multilayer switches make forwarding decisions based upon
which ports are configured for which VLANs. Internal Route
Processors and ISL-configured links inherently use VLAN IDs to
identify interfaces. External Route Processor interfaces have
knowledge regarding subnets but not VLANs. Therefore, MLS requires
that each external Route Processor interface have a VLAN ID assigned
to it.
To assign a VLAN ID to a Route
Processor interface, enter the following command in interface
configuration mode:
Router(config)#interface
interface number
Router(config-if)#mls rp vlan-id vlan-id-num
where vlan-id-num
represents the VLAN assigned to this interface.
To remove an interface from a VLAN,
enter the no mls rp vlan-id
vlan-id-num command. Removing the
VLAN ID from an interface disables MLS for that interface.
|