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Cisco Catalyst Blade Switch 3020 for HP Software Configuration Guide
OL-8915-03
Chapter 1 Overview
Features
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Flex Link Layer 2 interfaces to back up one another as an alternative to STP for basic link
redundancy
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Link state tracking (Layer 2 trunk failover) to mirror the state of the external Ethernet links and to
allow the failover of the processor blade traffic to an operational external link on a separate Cisco
Ethernet switch
VLAN Features
These are the VLAN features:
•
Support for up to 1005 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
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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
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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
•
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.
•
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.
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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
Security Features
The switch ships with these security features:
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IP Service Level Agreements (IP SLAs) support to measure network performance by using active
traffic monitoring
•
Web authentication to allow a supplicant (client) that does not support IEEE 802.1x functionality to
be authenticated using a web browser
•
MAC authentication bypass (MAB) aging timer to detect inactive hosts that have authenticated after
they have authenticated by using MAB
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Password-protected access (read-only and read-write access) to management interfaces (device
manager and the CLI for protection against unauthorized configuration changes
