Cisco Catalyst 2950 Command Reference

C-15
Catalyst 2950 and Catalyst 2955 Switch Command Reference
OL-10102-01
Appendix C Catalyst 2950 and 2955 Switch Debug Commands
debug spanning-tree mstp
debug spanning-tree mstp
Use the debug spanning-tree mstp privileged EXEC command to enable debugging of the Multiple
Spanning Tree Protocol (MSTP) software. Use the no form of this command to disable debugging.
debug spanning-tree mstp {all | boundary | bpdu-rx | bpdu-tx | errors | flush | init | migration |
pm | proposals | region | roles | sanity_check | sync | tc | timers}
no debug spanning-tree mstp {all | boundary | bpdu-rx | bpdu-tx | errors | flush | init | migration
| pm | proposals | region | roles | sanity_check | sync | tc | timers}
Syntax Description
Defaults Debugging is disabled.
Command Modes Privileged EXEC
Command History
all Display all MSTP debug messages.
boundary Display flag change debug messages at these boundaries:
• An multiple spanning-tree (MST) region and a single spanning-tree region
running Rapid Spanning Tree Protocol (RSTP)
• An MST region and a single spanning-tree region running IEEE 802.1D
• An MST region and another MST region with a different configuration
bpdu-rx Display received MST bridge protocol data unit (BPDUs) debug messages.
bpdu-tx Display sent MST BPDU debug messages.
errors Display MSTP error debug messages.
flush Display port-flushing mechanism debug messages.
init Display MSTP data structure initialization debug messages.
migration Display protocol-migration state-machine debug messages.
pm Display MSTP port-manager event debug messages.
proposals Display handshake messages between the designated switch and the root switch
debug messages.
region Display region synchronization between the switch processor (SP) and the route
processor (RP) debug messages.
roles Display MSTP role debug messages.
sanity_check Display received BPDU sanity check debug messages.
sync Display port synchronization event debug messages.
tc Display topology change notification event debug messages.
timers Display MSTP timers for start, stop, and expire event debug messages.
Release Modification
12.1(9)EA1 This command was introduced.

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