Cisco Catalyst 4500 Series Command Reference Guide

2-171
Catalyst 4500 Series Switch Cisco IOS Command Reference—Release IOS XE 3.4.0SG and IOS 15.1(2)SG)
OL-27596 -01
Chapter 2 Cisco IOS Commands for the Catalyst 4500 Series Switches
debug spanning-tree backbonefast
debug spanning-tree backbonefast
To enable debugging of the spanning tree BackboneFast events, use the debug spanning-tree
backbonefast command. To disable the debugging output, use the no form of this command.
debug spanning-tree backbonefast [detail | exceptions]
no debug spanning-tree backbonefast
Syntax Description
Defaults This command has no default settings.
Command Modes Privileged EXEC mode
Command History
Usage Guidelines This command is supported only on the supervisor engine and enterable only from the switch console.
Examples This example shows how to enable the debugging and to display the detailed spanning tree BackboneFast
debugging information:
Switch# debug spanning-tree backbonefast detail
Spanning Tree backbonefast detail debugging is on
Switch#
Related Commands
detail (Optional) Displays the detailed BackboneFast debugging messages.
exceptions (Optional) Enables the debugging of spanning tree BackboneFast exceptions.
Release Modification
12.1(8a)EW Support for this command was introduced on the Catalyst 4500 series switch.
Command Description
undebug spanning-tree backbonefast
(same as no debug spanning-tree
backbonefast)
Disables debugging output.

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