Cisco Catalyst 2950 Command Reference

C-10
Catalyst 2950 and Catalyst 2955 Switch Command Reference
OL-10102-01
Appendix C Catalyst 2950 and 2955 Switch Debug Commands
debug spanning-tree
debug spanning-tree
Use the debug spanning-tree privileged EXEC command to enable debugging of spanning-tree
activities. Use the no form of this command to disable debugging.
debug spanning-tree {all | backbonefast | bpdu | bpdu-opt | config | csuf/csrt | etherchannel |
events | exceptions | general | mstp | pvst+ | root | snmp | switch | synchronization |
uplinkfast}
no debug spanning-tree {all | backbonefast | bpdu | bpdu-opt | config | csuf/csrt | etherchannel
| events | exceptions | general | mstp | pvst+ | root | snmp | switch | synchronization |
uplinkfast}
Note The csuf option is not supported on the switch.
Syntax Description
Defaults Debugging is disabled.
Command Modes Privileged EXEC
all Display all spanning-tree debug messages.
backbonefast Display BackboneFast-event debug messages.
bpdu Display spanning-tree bridge protocol data unit (BPDU) debug messages.
bpdu-opt Display optimized BPDU handling debug messages.
config Display spanning-tree configuration change debug messages.
csuf/csrt Display cross-stack UplinkFast activity debug messages.
etherchannel Display EtherChannel-support debug messages.
events Display spanning-tree topology event debug messages.
exceptions Display spanning-tree exception debug messages.
general Display general spanning-tree activity debug messages.
mstp Debug Multiple Spanning Tree Protocol events.
pvst+ Display per-VLAN spanning-tree plus (PVST+) event debug messages.
root Display spanning-tree root-event debug messages.
snmp Display spanning-tree Simple Network Management Protocol (SNMP)
handling debug messages.
switch Display switch shim command debug messages. This shim is the software
module that is the interface between the generic Spanning Tree Protocol (STP)
code and the platform-specific code of various switch platforms.
synchronization Display the spanning-tree synchronization event debug messages.
uplinkfast Display UplinkFast-event debug messages.

Cisco Catalyst 2950 Specifications

General

Forwarding Bandwidth	8.8 Gbps
Switching Capacity	13.6 Gbps
Forwarding Rate	6.6 Mpps
Weight	3.6 kg
RAM	16 MB
Flash Memory	8 MB
Operating Humidity	10% to 85% non-condensing
Uplink Ports	2 x 10/100/1000Base-T
Dimensions	4.4 cm x 44.5 cm x 24.2 cm
Remote Management Protocol	SNMP, Telnet, HTTP
Features	Quality of Service (QoS), VLAN support
Compliant Standards	IEEE 802.3, IEEE 802.3u, IEEE 802.1D, IEEE 802.1Q, IEEE 802.1p
Status Indicators	system
Operating Temperature	0 to 45°C
Ports	24 x 10/100 Ethernet ports
MAC Address Table Size	8, 192 entries
Power Supply	Internal 100-240V AC, 50-60Hz