Cisco Catalyst 2960-X Command Reference

debug spanning-tree
To enable debugging of spanning-tree activities, use the debug spanning-tree command in EXEC mode. To
disable debugging, use the no form of this command.
debug spanning-tree {all | backbonefast | bpdu | bpdu-opt | config | csuf/csrt | etherchannel | events |
exceptions | general | mstp | pvst+| root | snmp | synchronization | switch | uplinkfast}
no debug spanning-tree {all | backbonefast | bpdu | bpdu-opt | config | csuf/csrt | etherchannel | events
| exceptions | general | mstp | pvst+| root | snmp | synchronization | switch | uplinkfast}
Syntax Description
Displays all spanning-tree debug messages.all
Displays BackboneFast-event debug messages.backbonefast
Displays spanning-tree bridge protocol data unit
(BPDU) debug messages.
bpdu
Displays optimized BPDU handling debug messages.bpdu-opt
Displays spanning-tree configuration change debug
messages.
config
Displays cross-stack UplinkFast and cross-stack rapid
transition activity debug messages.
csuf/csrt
Displays EtherChannel-support debug messages.etherchannel
Displays spanning-tree topology event debug messages.events
Displays spanning-tree exception debug messages.exceptions
Displays general spanning-tree activity debug messages.general
Debugs Multiple Spanning Tree Protocol (MSTP)
events.
mstp
Displays per-VLAN spanning-tree plus (PVST+) event
debug messages.
pvst+
Displays spanning-tree root-event debug messages.root
Displays spanning-tree Simple Network Management
Protocol (SNMP) handling debug messages.
snmp
Catalyst 2960-X Switch Layer 2 Command Reference, Cisco IOS Release 15.0(2)EX
38 OL-29043 -01
Layer 2 Commands
debug spanning-tree

Cisco Catalyst 2960-X Specifications

General

Console port	RJ-45
USB 2.0 ports quantity	2
SFP module slots quantity	4
Installed SFP modules quantity	-
Gigabit Ethernet (copper) ports quantity	48
Basic switching RJ-45 Ethernet ports type	Gigabit Ethernet (10/100/1000)
Power source	AC
Input current	5 A
AC input voltage	100 - 240 V
Power consumption (typical)	60.9 W
Number of power supply units	1
Redundant power supply (RPS) support	Yes
Operating altitude	0 - 3000 m
Non-operating altitude	0 - 4000 m
Storage temperature (T-T)	-25 - 70 °C
Operating temperature (T-T)	-5 - 40 °C
Operating relative humidity (H-H)	10 - 95 %
Switching protocols	UDP, TCP, RADIUS/TACACS+
Number of VLANs	1023
Networking standards	IEEE 802.1ab, IEEE 802.1D, IEEE 802.1p, IEEE 802.1Q, IEEE 802.1s, IEEE 802.1w, IEEE 802.1x, IEEE 802.3, IEEE 802.3ab, IEEE 802.3ad, IEEE 802.3ae, IEEE 802.3af, IEEE 802.3ah, IEEE 802.3at, IEEE 802.3az, IEEE 802.3u, IEEE 802.3x, IEEE 802.3z
Throughput	107.1 Mpps
Jumbo frames	9216
Number of queues	8
MAC address table	16000 entries
Number of static routes	1000
DHCP features	DHCP server
Authentication	MAC-based authentication, Port-based authentication
Security algorithms	802.1x RADIUS, SNMP, SSH
Access Control List (ACL) rules	3
Switch type	Managed
Switch layer	L2/L3
Safety	UL 60950-1, CAN/CSA-C22.2 No. 60950-1, EN 60950-1, IEC 60950-1, AS/NZS 60950-1
Form factor	1U
Product color	Black
Total Power over Ethernet (PoE) budget	370 W
Power over Ethernet (PoE) ports quantity	24
Power over Ethernet plus (PoE+) ports quantity	12
Memory type	DRAM
Noise level	39 dB
Flash memory	128 MB
Internal memory	512 MB
Processor frequency	600 MHz
Mean time between failures (MTBF)	276870 h

Weight and Dimensions

Depth	368 mm
Width	445 mm
Height	45 mm
Weight	5800 g