Cisco Catalyst 4500 series Administration Manual page 805

Chapter 29 Configuring 802.1Q Tunneling, VLAN Mapping, and Layer 2 Protocol Tunneling
Table 29-2 Commands for Monitoring and Maintaining Tunneling (continued)
Command
Switch# show l2protocol-tunnel
Switch# show errdisable recovery
Switch# show l2protocol-tunnel interface
interface-id
Switch# show l2protocol-tunnel summary
Switch# show vlan dot1q native
Note With Cisco IOS Release 12.2(20)EW, the BPDU filtering configuration for both dot1q and Layer 2
protocol tunneling is no longer visible in the running configuration as spanning-tree bpdufilter enable.
The configuration is visible in the output of the show spanning tree int detail command.
Switch# show spann int f6/1 detail
Port 321 (FastEthernet6/1) of VLAN0001 is listening
Port path cost 19, Port priority 128, Port Identifier 128.321.
Designated root has priority 32768, address 0008.e341.4600
Designated bridge has priority 32768, address 0008.e341.4600
Designated port id is 128.321, designated path cost 0
Timers: message age 0, forward delay 2, hold 0
Number of transitions to forwarding state: 0
Link type is point-to-point by default
** Bpdu filter is enabled internally **
BPDU: sent 0, received 0
OL_28731-01
Purpose
Displays information about Layer 2 protocol tunneling ports.
Verifies if the recovery timer from a Layer 2 protocol-tunnel error disable
state is enabled.
Displays information about a specific Layer 2 protocol tunneling port.
Displays only Layer 2 protocol summary information.
Displays the status of native VLAN tagging on the switch.
Software Configuration Guide—Release IOS XE 3.6.0E and IOS 15.2(2)E
Monitoring and Maintaining Tunneling Status
29-19