7.2 Basic MLS Configuration
7.2.2 Assigning an MLS interface to a VTP domain
After it is determined which Route Processor interfaces will be MLS interfaces, the interfaces must be added to the same VLAN Trunking Protocol (VTP) domain as the switch. Both the switch and the MLS interfaces must be in the same domain. If the switch is not assigned to the VTP domain, this task does not have to be performed. The configuration in the Figure illustrates how to assign a VTP domain to an interface.

To place an external Route Processor interface in the same VTP domain as the switch, enter the following command in interface configuration mode

Router(config)#interface vlan vlan_number
Router(config-if)#mls rp vtp-domain domain-name

where domain-name  is the name of the VTP domain in which the switch resides.

Note: For an ISL interface, enter this command only on the primary interface. All subinterfaces that are part of the primary interface inherit the VTP domain of the primary interface.

The running configuration example in the Figure states that the VLAN41 interface of the MLS-RP is configured to reside in the cisco  VTP domain. To remove the MLS interface from a VTP domain, enter the no mls rp vtp-domain domain-name  command.

To view information about a specific VTP domain, enter the following command in privileged EXEC mode.

Router#show mls rp vtp-domain vtp domain name

The display resulting from this command shows a subset of the show mls rp command display. The following information is a result of issuing the show mls rp vtp-domain command.

  • The name of the VTP domain(s) in which the MLS-RP interfaces reside
  • Statistical information for each VTP domain
  • The number of management interfaces defined for the MLS-RP
  • The number of VLANs in this domain configured for MLS
  • The ID of each VLAN configured for this domain MAC address
  • The number of MLS-SEs of which the router or RSM has knowledge of in this domain
  • The MAC address of each switch in this domain