Cisco Catalyst 4500 Series Command Reference Guide

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Catalyst 4500 Series Switch Cisco IOS Command Reference—Release IOS XE 3.4.0SG and IOS 15.1(2)SG)
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Chapter 2 Cisco IOS Commands for the Catalyst 4500 Series Switches
l2protocol-tunnel drop-threshold
l2protocol-tunnel drop-threshold
To set a drop threshold for the maximum rate of Layer 2 protocol packets per second to be received
before an interface drops packets, use the I2protocol-tunnel drop-threshold command. You can set the
drop threshold for the Cisco Discovery Protocol (CDP), Spanning Tree Protocol (STP), or VLAN
Trunking Protocol (VTP) packets. To disable the drop threshold on the interface, use the no form of this
command.
l2protocol-tunnel drop-threshold [cdp | stp | vtp] value
no l2protocol-tunnel drop-threshold [cdp | stp | vtp] value
Syntax Description
Defaults The default is no drop threshold for the number of the Layer 2 protocol packets.
Command Modes Interface configuration mode
Command History
Usage Guidelines The l2protocol-tunnel drop-threshold command controls the number of protocol packets per second
that are received on an interface before it drops packets. When no protocol option is specified with a
keyword, the threshold is applied to each of the tunneled Layer 2 protocol types. If you also set a
shutdown threshold on the interface, the drop-threshold value must be less than or equal to the
shutdown-threshold value.
When the drop threshold is reached, the interface drops the Layer 2 protocol packets until the rate at
which they are received is below the drop threshold.
Examples This example shows how to configure the drop threshold rate:
Switch(config-if)# l2protocol-tunnel drop-threshold cdp 50
Switch(config-if)#
Related Commands
cdp (Optional) Specifies a drop threshold for CDP.
stp (Optional) Specifies a drop threshold for STP.
vtp (Optional) Specifies a drop threshold for VTP.
value Specifies a threshold in packets per second to be received for encapsulation before the
interface shuts down, or specifies the threshold before the interface drops packets. The
range is 1 to 4096. The default is no threshold.
Release Modification
12.2(18)EW Support for this command was introduced on the Catalyst 4500 series switch.

Cisco Catalyst 4500 Series Specifications

General

Series	Catalyst 4500 Series
Category	Switch
Layer Support	Layer 2, Layer 3
Form Factor	Modular chassis
Stackable	No
Chassis Slots	3, 6, 7, 10
Power Supply Options	AC, DC
Redundancy	Power supply, Supervisor engine
Network Management	Cisco IOS Software CLI, SNMP, Cisco Prime Infrastructure
Features	Security, QoS
Port Density	Up to 384 ports per chassis
Security Features	802.1X, ACLs, DHCP Snooping, Dynamic ARP Inspection, IP Source Guard
Supervisor Engine	8-E