Cisco 3120 Series Quickspecs - Page 11

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QuickSpecs

Technical Specifications

Spanning Tree Features

Trunking Features

DA - 13023

Cisco Catalyst Blade Switch 3120 for HP

Secure Shell (SSH) Protocol, Kerberos, and Simple Network Management

Protocol Version 3 (SNMPv3) provide network security by encrypting

administrator traffic during Telnet and SNMP sessions. SSH Protocol,

Kerberos, and the cryptographic version of SNMPv3 require a special

cryptographic software image because of U.S. export restrictions.

Bidirectional data support on the Switched Port Analyzer (SPAN) port allows

Cisco Intrusion Detection System (IDS) to take action when an intruder is

detected.

TACACS+ and RADIUS authentication facilitates centralized control of the

switch and restricts unauthorized users from altering the configuration.

MAC Address Notification allows administrators to be notified of users added

to or removed from the network.

Port Security secures the access to an access or trunk port based on MAC

address.

Multilevel security on console access prevents unauthorized users from

altering the switch configuration.

Bridge protocol data unit (BPDU) Guard shuts down Spanning Tree PortFast-

enabled interfaces when BPDUs are received to avoid accidental topology

loops.

Spanning Tree Root Guard (STRG) prevents edge devices not in the network

administrator's control from becoming Spanning Tree Protocol root nodes.

IGMP filtering provides multicast authentication by filtering out

nonsubscribers and limits the number of concurrent multicast streams

available per port.

IEEE 802.1D Spanning-Tree Protocol support for redundant backbone

connections and loop-free networks simplifies network configuration and

improves fault tolerance.

Per-VLAN Rapid Spanning-Tree (PVRST+) allows rapid spanning-tree

convergence on a per-VLAN spanning-tree basis, without requiring the

implementation of spanning-tree instances.

IEEE 802.1s Multiple Spanning-Tree Protocol (MSTP) allows a spanning-tree

instance per VLAN and enables each VLAN to use a different uplink allowing

better utilization of uplinks.

IEEE 802.1w Rapid Spanning-Tree Protocol (RSTP) provides rapid spanning-

tree convergence independent of spanning-tree timers.

Unidirectional Link Detection (UDLD) and Aggressive UDLD allow

unidirectional links to be detected and disabled to avoid problems such as

spanning-tree loops.

Cisco UplinkFast and BackboneFast technologies help to ensure quick

failover recovery, enhancing overall network stability and reliability.

PVST+ allows for Layer 2 load sharing on redundant links to efficiently use

the extra capacity inherent in a redundant design.

Dynamic Trunking Protocol (DTP) enables dynamic trunk configuration

across all switch ports.

Worldwide — Version 4 — May 1, 2009

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