Security Features - Cisco Catalyst 3120 Software Manual

Features
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Security Features

The switch ships with these security features:
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Cisco Catalyst Blade Switch 3120 for HP Software Configuration Guide
1-8
Inter-Switch Link (ISL) and 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 between two devices and for
negotiating the type of trunking encapsulation (IEEE 802.1Q or ISL) 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
Dynamic voice virtual LAN (VLAN) for multidomain authentication (MDA) to allow a dynamic
voice VLAN on an MDA-enabled port
VLAN 1 minimization for reducing the risk of spanning-tree loops 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.
Private VLANs to address VLAN scalability problems, to provide a more controlled IP address
allocation, and to allow Layer 2 ports to be isolated from other ports on the switch
Port security on a PVLAN host to limit the number of MAC addresses learned on a port, or define
which MAC addresses may be learned on a port
VLAN Flex Link Load Balancing to provide Layer 2 redundancy without requiring Spanning Tree
Protocol (STP). A pair of interfaces configured as primary and backup links can load balance traffic
based on VLAN.
Web authentication to allow a supplicant (client) that does not support IEEE 802.1x functionality to
be authenticated using a web browser.
Password-protected access (read-only and read-write access) to management interfaces (device
manager, Network Assistant, and the 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 on the same switch
Port security option for limiting and identifying MAC addresses of the stations allowed to access
the port
VLAN aware port security option to shut down the VLAN on the port when a violation occurs,
instead of shutting down the entire 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 security policies in both directions
on routed interfaces (router ACLs) and VLANs and inbound on Layer 2 interfaces (port ACLs)
Extended MAC access control lists for defining security policies in the inbound direction on Layer 2
interfaces
Chapter 1 Overview
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