Cisco Catalyst 2960-X Configuration Guide

Port-Based VLANs
A VLAN is a switched network that is logically segmented by function, team, or application, without regard
to the physical location of the users. Packets received on a port are forwarded only to ports that belong to the
same VLAN as the receiving port. Network devices in different VLANs cannot communicate with one another
without a Layer 3 device to route traffic between the VLANs.
VLAN partitions provide hard firewalls for traffic in the VLAN, and each VLAN has its own MAC address
table. A VLAN comes into existence when a local port is configured to be associated with the VLAN, when
the VLAN Trunking Protocol (VTP) learns of its existence from a neighbor on a trunk, or when a user creates
a VLAN. VLANs can be formed with ports across the stack.
To configure VLANs, use the vlan vlan-id global configuration command to enter VLAN configuration mode.
The VLAN configurations for normal-range VLANs (VLAN IDs 1 to 1005) are saved in the VLAN database.
If VTP is version 1 or 2, to configure extended-range VLANs (VLAN IDs 1006 to 4094), you must first set
VTP mode to transparent. Extended-range VLANs created in transparent mode are not added to the VLAN
database but are saved in the switch running configuration. With VTP version 3, you can create extended-range
VLANs in client or server mode. These VLANs are saved in the VLAN database.
In a switch stack, the VLAN database is downloaded to all switches in a stack, and all switches in the stack
build the same VLAN database. The running configuration and the saved configuration are the same for all
switches in a stack.
Add ports to a VLAN by using the switchport interface configuration commands:
•
Identify the interface.
•
For a trunk port, set trunk characteristics, and, if desired, define the VLANs to which it can belong.
•
For an access port, set and define the VLAN to which it belongs.
Switch Ports
Switch ports are Layer 2-only interfaces associated with a physical port. Switch ports belong to one or more
VLANs. A switch port can be an access port or a trunk port. You can configure a port as an access port or
trunk port or let the Dynamic Trunking Protocol (DTP) operate on a per-port basis to set the switchport mode
by negotiating with the port on the other end of the link. Switch ports are used for managing the physical
interface and associated Layer 2 protocols and do not handle routing or bridging.
Configure switch ports by using the switchport interface configuration commands.
Access Ports
An access port belongs to and carries the traffic of only one VLAN (unless it is configured as a voice VLAN
port). Traffic is received and sent in native formats with no VLAN tagging. Traffic arriving on an access port
is assumed to belong to the VLAN assigned to the port. If an access port receives a tagged packet (Inter-Switch
Link [ISL] or IEEE 802.1Q tagged), the packet is dropped, and the source address is not learned.
Two types of access ports are supported:
•
Static access ports are manually assigned to a VLAN (or through a RADIUS server for use with IEEE
802.1x.
•
VLAN membership of dynamic access ports is learned through incoming packets. By default, a dynamic
access port is not a member of any VLAN, and forwarding to and from the port is enabled only when
Catalyst 2960-XR Switch Interface and Hardware Component Configuration Guide, Cisco IOS Release 15.0(2)EX1
14 OL-29420-01
Configuring Interface Characteristics
Interface Types

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