Cisco Catalyst 2960-X Configuration Guide

Table 12: IEEE Power Classifications
Maximum Power Level Required from the SwitchClass
15.4 W0 (class status unknown)
4 W1
7 W2
15.4 W3
30 W (For IEEE 802.3at Type 2 powered devices)4
The switch monitors and tracks requests for power and grants power only when it is available. The switch
tracks its power budget (the amount of power available on the switch for PoE). The switch performs
power-accounting calculations when a port is granted or denied power to keep the power budget up to date.
After power is applied to the port, the switch uses CDP to determine the CDP-specific power consumption
requirement of the connected Cisco powered devices, which is the amount of power to allocate based on the
CDP messages. The switch adjusts the power budget accordingly. This does not apply to third-party PoE
devices. The switch processes a request and either grants or denies power. If the request is granted, the switch
updates the power budget. If the request is denied, the switch ensures that power to the port is turned off,
generates a syslog message, and updates the LEDs. Powered devices can also negotiate with the switch for
more power.
With PoE+, powered devices use IEEE 802.3at and LLDP power with media dependent interface (MDI) type,
length, and value descriptions (TLVs), Power-via-MDA TLVs, for negotiating power up to 30 W. Cisco
pre-standard devices and Cisco IEEE powered devices can use CDP or the IEEE 802.3at power-via-MDI
power negotiation mechanism to request power levels up to 30 W.
The initial allocation for Class 0, Class 3, and Class 4 powered devices is 15.4 W. When a device starts
up and uses CDP or LLDP to send a request for more than 15.4 W, it can be allocated up to the maximum
of 30 W.
Note
The CDP-specific power consumption requirement is referred to as the actual power consumption
requirement in the software configuration guides and command references.
Note
If the switch detects a fault caused by an undervoltage, overvoltage, overtemperature, oscillator-fault, or
short-circuit condition, it turns off power to the port, generates a syslog message, and updates the power
budget and LEDs.
The PoE feature operates the same whether or not the switch is a stack member. The power budget is per-switch
and independent of any other switch in the stack. Election of a new active switch does not affect PoE operation.
The active switch keeps track of the PoE status for all switches and ports in the stack and includes the status
in output displays.
Catalyst 2960-XR Switch Interface and Hardware Component Configuration Guide, Cisco IOS Release 15.0(2)EX1
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Configuring PoE
Power over Ethernet Ports

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