Cisco Catalyst 2960-X Command Reference

spanning-tree bpduguard
To enable bridge protocol data unit (BPDU) guard on the interface, use the spanning-tree bpduguard
command in interface configuration mode. To return to the default settings, use the no form of this command.
spanning-tree bpduguard {enable| disable}
no spanning-tree bpduguard
Syntax Description
Enables BPDU guard on this interface.enable
Disables BPDU guard on this interface.disable
Command Default
The setting that is already configured when you enter the spanning-tree portfast bpduguard default command.
Command Modes
Interface configuration
Command History
ModificationRelease
This command was introduced.Cisco IOS 15.0(2)EX
Usage Guidelines
Use the BPDU guard feature in a service-provider environment to prevent an access port from participating
in the spanning tree. If the port still receives a BPDU, it is put in the error-disabled state as a protective
measure. This command has three states:
• spanning-tree bpduguard enable —Unconditionally enables BPDU guard on the interface.
• spanning-tree bpduguard disable —Unconditionally disables BPDU guard on the interface.
• no spanning-tree bpduguard —Enables BPDU guard on the interface if the interface is in the operational
PortFast state and if you configure the spanning-tree portfast bpduguard default command.
Examples
This example shows how to enable BPDU guard on an interface:
Switch(config-if)# spanning-tree bpduguard enable
Switch(config-if)#
Related Commands
DescriptionCommand
Enables PortFast on the interface.
spanning-tree portfast (interface configuration)
Catalyst 2960-X Switch Layer 2 Command Reference, Cisco IOS Release 15.0(2)EX
80 OL-29043 -01
Layer 2 Commands
spanning-tree bpduguard

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