16-9
ATM Switch Router Software Configuration Guide
OL-7396-01
Chapter16 Configuring Tag Switching and MPLS
Configuring Tag Switching
Switch(config-if)# ip address 1.2.0.12 255.255.255.0
Switch(config-if)# tag-switching ip
Switch(config-if)# tag-switching atm control-vc 6 32
Switch(config-if)# exit
If you are having trouble establishing a TDP session, verify that the VPI and VCI values match on the
TDP control channels of the source switch and destination switch.

Displaying the TDP Control Channels

To display the TDP control channel configuration, use the following EXEC command:
The following example shows the TDP control channel configuration on interface ATM 0/0/3:
Switch# show tag-switching interfaces detail
Interface ATM0/0/3:
IP tagging enabled
TSP Tunnel tagging not enabled
Tagging operational
MTU = 4470
ATM tagging: Tag VPI = 1, Control VC = 0/32
<information deleted>
Configuring Tag Switching on VP Tunnels
If you want to configure tag switching on virtual path (VP) tunnel s, perform the following steps,
beginning in global configuration mode:
Note This procedure is optional.
Command Purpose
show tag-switching interfaces detail Displays the TDP control channel
configuration on an interface.
Command Purpose
Step1 Switch(config)# interface atm card/subcard/port
Switch(config-if)#
Enters interface configuration mode on the
specified ATM interface.
Step2 Switch(config-if)# atm pvp vpi Creates a PVP. When configuring PVP
connections, configure the lowest VPI numbers
first.
Step3 Switch(config-if)# exit
Switch(config)#
Returns to global configuration mode.
Step4 Switch(config)# interface atm
card/subcard/port.subinterface#
Switch(config-subif)#
Enters subinterface configuration mode.