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Catalyst 2960 Switch SoftwareConfiguration Guide
78-16881-01
Chapter1 Overview
Features
VLAN Features
Support for up to 255 VLANs for assigning users to VLANs associated with appropriate network
resources, traffic patterns, and bandwidth
Support for VLAN IDs in the 1 to 4094 range as allowed by the IEEE 802.1Q standard
VLAN Query Protocol (VQP) for dynamic VLAN membership
IEEE 802.1Q trunking encapsulation on all ports for network moves, adds, and changes;
management and control of broadcast and multicast traffic; and network security by establishing
VLAN groups for high-security users and network resources
Dynamic Trunking Protocol (DTP) for negotiating trunking on a link betwee n two devices and for
negotiating the type of trunking encapsulation (IEEE 802.1Q) to be used
VLAN Trunking Protocol (VTP) and VTP pruning for reducing network traffic by restricting
flooded traffic to links destined for stations receiving the traffic
Voice VLAN for creating subnets for voice traffic from Cisco IP Phones
VLAN1 minimization for reducing the risk of spanning-tree l oops or storms by allowing VLAN 1
to be disabled on any individual VLAN trunk link. With this feature enabled, no user traffic is sent
or received on the trunk. The switch CPU continues to send and receive control protocol frames.
Security Features
Password-protected access (read-only and read-write access) to management interfaces (device
manager, Network Assistant, CLI) for protection against unauthorized configuration changes
Multilevel security for a choice of security level, notification, and resulting actions
Static MAC addressing for ensuring security
Protected port option for restricting the forwarding of traffic to designated ports o n the same switch
Port security option for limiting and identifying MAC addresses of the stations allowed to access
the port
Port security aging to set the aging time for secure addresses on a port
BPDU guard for shutting down a Port Fast-configured port when an invalid configuration occurs
Standard and extended IP access control lists (ACLs) for defining inbound security policies on Layer
2 interfaces (port ACLs)
Extended MAC access control lists for defining security policies in the inbound direction on Layer2
interfaces
Source and destination MAC-based ACLs for filtering non-IP traffic
DHCP snooping to filter untrusted DHCP messages between untrusted hosts and DHCP servers
IEEE 802.1x port-based authentication to prevent unauthorized devices (clients) from gaining
access to the network. These features are supported:
VLAN assignment for restricting IEEE 802.1x-authenticated users to a specified VLAN
Port security for controlling access to IEEE 802.1x ports
Voice VLAN to permit a Cisco IP Phone to access the voice VLAN regardless of the authorized
or unauthorized state of the port