13-13
Cisco ME 3400 Ethernet Access Switch Software Configuration Guide
OL-9639-07
Chapter 13 Configuring IEEE 802.1Q Tunneling and Layer 2 Protocol Tunneling
Configuring Layer 2 Protocol Tunneling
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.
Step 4
switchport mode access
or
switchport mode dot1q-tunnel
or
switchport mode trunk
Configure the interface as an access port, an 802.1Q tunnel port or a trunk
port. The default switchport mode is access.
Step 5
l2protocol-tunnel [cdp | stp | vtp] Enable protocol tunneling for the desired protocol. If no keyword is entered,
tunneling is enabled for all three Layer 2 protocols.
Step 6
l2protocol-tunnel
shutdown-threshold [cdp | stp | vtp]
value
(Optional) Configure the threshold for packets-per-second accepted for
encapsulation. The interface is disabled if the configured threshold is
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 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.
Step 7
l2protocol-tunnel drop-threshold
[cdp | stp | vtp] value
(Optional) Configure the threshold for packets-per-second accepted for
encapsulation. The interface drops packets if the configured threshold is
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.
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.
Step 8
exit Return to global configuration mode.
Step 9
errdisable recovery cause l2ptguard (Optional) Configure the recovery mechanism from a Layer 2
maximum-rate error so that the interface is re-enabled and can try again.
Errdisable recovery is disabled by default; when enabled, the default time
interval is 300 seconds.
Step 10
l2protocol-tunnel cos value (Optional) Configure 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.
Step 11
end Return to privileged EXEC mode.
Step 12
show l2protocol Display the Layer 2 tunnel ports on the switch, including the protocols
configured, the thresholds, and the counters.
Step 13
copy running-config startup-config (Optional) Save your entries in the configuration file.
Command Purpose
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