Specifications

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Catalyst 4500 Se ries S wit ch C is co IO S C om mand R efer ence —Re lease I OS XE 3 .3.0 XO(1 5.1 (1)XO)
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Chapter 2 Cisco IOS Commands for the Catalyst 4500 Series Switches
l2protocol-tunnel shutdown-threshold
l2protocol-tunn el shutdown-t hreshold
To configure the protocol t unneling encapsulati on rate, use the I2 prot ocol -tunn el sh utdo wn-th resh old
command. You can set the encapsulation rate f or the Cisco Discovery Prot ocol (CDP), Spanning Tr ee
Protocol (STP), or VLAN Trunking Proto col (VTP) packets. To disab le the encapsulation rat e on the
interface, use the no form of this command.
l2protocol-tunnel s hut dow n-t hr esho l d [ cdp | stp | vtp] value
no l2protocol-tunnel shutdown-threshold [cdp | stp | vtp] value
Syntax Description
Defaults The default is no shut down threshold for the num ber of Layer 2 protocol packe ts.
Command Modes Interface configur ation mode
Usage Guidelines The l2-protocol-tunnel shutdown-threshold command controls the number of protocol packets per
second that are received on an interface before it shuts down. When no protocol option is specified with
the keyword, the threshold is appli ed to each of the tunneled Layer 2 protocol types. If you also se t a
drop threshold on the interface, the shutdown-threshold value must be greater than or equal to the
drop-threshold value.
When the shutdown threshold is reached, the interfa ce is error disabled. If you enable error recovery by
entering the errdisable recovery cause l2ptguard command, the interface is brought ou t of the
error-disabled state and allowed to retry the operation again when all the causes have timed out. If the
error recovery feature generatio n is not enabled for l2pt guard, the interface stays in the error-disabled
state until you enter the shutdown and no shutdown commands.
Examples This example shows how to configure the maximum r ate:
Switch(config-if)# l2protocol-tunnel shutdown-threshold cdp 50
Switch(config-if)#
Related Commands
cdp (Optional) Specifies a shutdown threshold for CDP.
stp (Optional) Specifies a shutdown threshold for STP.
vtp (Optional) Specifies a shutdown threshold for VTP.
value Specifies a threshold in packets per second to be received for encap sulation before the
interface shuts down. The range is 1 to 4096. The default is no threshold.
Command Description
l2protocol-tunnel Enables protocol tunneling on an interface.