Cisco Catalyst 4500 Series Software Configuration Manual page 888

Configuring Layer 2 Protocol Tunneling
Command
Step 5
Switch(config-if)#
l2protocol-tunnel
shutdown-threshold
point-to-point
Step 6
Switch(config-if)#
l2protocol-tunnel drop-threshold
[ |
cdp point-to-point
value
Step 7
Switch(config-if)# exit
Step 8
Switch(config)# errdisable
recovery cause l2ptguard
Step 9
Switch(config)# l2protocol-tunnel
cos value
Step 10
Switch(config)# end
Step 11
Switch# show l2protocol
Step 12
Switch# copy running-config
startup-config
Use the no l2protocol-tunnel [cdp | stp | vtp] interface configuration command to disable protocol
tunneling for one of the Layer 2 protocols or for all three. Use the no l2protocol-tunnel
shutdown-threshold [cdp | stp | vtp] and the no l2protocol-tunnel drop-threshold [cdp | stp | vtp]
commands to return the shutdown and drop thresholds to the default settings.
This example shows how to configure Layer 2 protocol tunneling on an 802.1Q tunnel port for CDP, STP,
VTP, and LLDP and how to verify the configuration:
Switch(config)# interface FastEthernet 1/1/11
Switch(config-if)# switchport mode dot1q-tunnel
Switch(config-if)# l2protocol-tunnel cdp
Switch(config-if)# l2protocol-tunnel stp
Switch(config-if)# l2protocol-tunnel vtp
Switch(config-if)# l2protocol-tunnel lldp
Switch(config-if)# l2protocol-tunnel shutdown-threshold 1500
Switch(config-if)# l2protocol-tunnel drop-threshold 1000
Switch(config-if)# exit
Switch(config)# l2protocol-tunnel cos 7
Switch(config)# end
Switch# show l2protocol
COS for Encapsulated Packets: 7
Catalyst 4500 Series Switch, Cisco IOS Software Configuration Guide - Cisco IOS XE 3.9.xE and IOS 15.2(5)Ex
30-18
Chapter 30
Purpose
(Optional) Configures the threshold for packets-per-second accepted for
encapsulation. The interface is disabled if the configured threshold is
[ |
cdp
exceeded. If no protocol option is specified, the threshold applies to each of
| | ]
stp vtp value
the tunneled Layer 2 protocol types. The range is 1 to 4096. The default is
to have no threshold configured.
Note
(Optional) Configures the threshold for packets-per-second accepted for
encapsulation. The interface drops packets if the configured threshold is
| | ]
stp vtp
exceeded. If no protocol option is specified, the threshold applies to each of
the tunneled Layer 2 protocol types. The range is 1 to 4096. The default is
to have no threshold configured.
Note
Returns to global configuration mode.
(Optional) Configures the recovery method from a Layer 2 maximum-rate
error so that the interface is reenabled and can try again. Errdisable recovery
is disabled by default; when enabled, the default time interval is 300
seconds.
(Optional) Configures the CoS value for all tunneled Layer 2 PDUs. The
range is 0 to 7; the default is the default CoS value for the interface. If none
is configured, the default is 5.
Returns to privileged EXEC mode.
Displays the Layer 2 tunnel ports on the switch, including the protocols
configured, the thresholds, and the counters.
(Optional) Saves your entries in the configuration file.
Configuring 802.1Q Tunneling, VLAN Mapping, and Layer 2 Protocol Tunneling
If you also set a drop threshold on this interface, the
shutdown-threshold value must be greater than or equal to the
drop-threshold value.
If you also set a shutdown threshold on this interface, the
drop-threshold value must be less than or equal to the
shutdown-threshold value.