Cisco Catalyst 2960-X User Manual

Default SettingFeature
Enabled in Cisco IOS software, requires configuration.
The switch gets network addresses and
configuration parameters only from a device
configured as a DHCP server.
Note
Cisco IOS DHCP server binding database
Enabled in Cisco IOS software, requires configuration.
This feature is operational only when a destination is
configured.
DHCP snooping binding database agent
2
The switch responds to DHCP requests only if it is configured as a DHCP server.
3
The switch relays DHCP packets only if the IP address of the DHCP server is configured on the SVI of the DHCP client.
4
Use this feature when the switch is an aggregation switch that receives packets with option-82 information from an edge switch.
DHCP Snooping Configuration Guidelines
•
If a switch port is connected to a DHCP server, configure a port as trusted by entering the ip dhcp
snooping trust interface configuration command.
•
If a switch port is connected to a DHCP client, configure a port as untrusted by entering the no ip dhcp
snooping trust interface configuration command.
•
You can display DHCP snooping statistics by entering the show ip dhcp snooping statistics user EXEC
command, and you can clear the snooping statistics counters by entering the clear ip dhcp snooping
statistics privileged EXEC command.
Configuring the DHCP Server
The switch can act as a DHCP server.
For procedures to configure the switch as a DHCP server, see the “Configuring DHCP” section of the “IP
addressing and Services” section of the Cisco IOS IP Configuration Guide, Release 12.4.
DHCP Server and Switch Stacks
The DHCP binding database is managed on the stack master. When a new stack master is assigned, the new
master downloads the saved binding database from the TFTP server. If the stack master fails, all unsaved
bindings are lost. The IP addresses associated with the lost bindings are released. You should configure an
automatic backup by using the ip dhcp database url [timeout seconds | write-delay seconds] global
configuration command.
When a stack merge occurs, the stack master that becomes a stack member loses all of the DHCP lease
bindings. With a stack partition, the new master in the partition acts as a new DHCP server without any of
the existing DHCP lease bindings.
Catalyst 2960-X Switch Security Configuration Guide, Cisco IOS Release 15.0(2)EX
OL-29048-01 217
Configuring DHCP
DHCP Snooping Configuration Guidelines

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