Datasheet

Data Sheet
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Superior Redundancy for
Fault Backup
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Cisco UplinkFast and BackboneFast technologies help ensure quick failover recovery,
enhancing overall network stability and reliability.
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IEEE 802.1w Rapid Spanning Tree Protocol provides rapid spanning-tree convergence
independent of spanning-tree timers and the benefit of distributed processing.
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Per-VLAN Rapid Spanning Tree Plus (PVRST+) allows rapid spanning-tree reconvergence on
a per-VLAN spanning-tree basis, without requiring the implementation of spanning-tree
instances.
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Command-switch redundancy enabled in Cisco Network Assistant software allows
designation of a backup command switch that takes over if the primary command switch fails.
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Unidirectional Link Detection Protocol (UDLD) and Aggressive UDLD allow unidirectional links
to be detected and disabled to avoid problems such as spanning-tree loops.
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Switch port autorecovery (errdisable) automatically attempts to re-enable a link that is
disabled because of a network error.
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Bandwidth aggregation up to 8 Gbps through Cisco Gigabit EtherChannel technology and up
to 800 Mbps through Cisco Fast EtherChannel technology enhances fault tolerance and offers
higher-speed aggregated bandwidth between switches and to routers and individual servers.
Integrated Cisco IOS
®
Software Features for
Bandwidth Optimization
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Per-port broadcast, multicast, and unicast storm control prevents faulty end stations from
degrading overall systems performance.
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IEEE 802.1d Spanning Tree Protocol support for redundant backbone connections and loop-
free networks simplifies network configuration and improves fault tolerance.
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PVST+ allows for Layer 2 load sharing on redundant links to efficiently use the extra capacity
inherent in a redundant design.
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IEEE 802.1s Multiple Spanning Tree Protocol allows a spanning-tree instance per VLAN,
enabling Layer 2 load sharing on redundant links.
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Local Proxy Address Resolution Protocol (ARP) works in conjunction with Private VLAN Edge
to minimize broadcasts and maximize available bandwidth.
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VLAN1 minimization allows VLAN1 to be disabled on any individual VLAN trunk link.
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VLAN Trunking Protocol (VTP) pruning limits bandwidth consumption on VTP trunks by
flooding broadcast traffic only on trunk links required to reach the destination devices.
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Internet Group Management Protocol (IGMP) Version 3 snooping provides fast client joins
and leaves of multicast streams and limits bandwidth-intensive video traffic to only the
requestors.
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IGMP filtering provides multicast authentication by filtering out no subscribers and limits the
number of concurrent multicast streams available per port.
QoS and Control
Advanced QoS
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Standard 802.1p CoS field classification is provided.
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Four egress queues per port enable differentiated management of up to four traffic types.
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SRR scheduling ensures differential prioritization of packet flows by intelligently servicing the
ingress and egress queues.
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Weighted tail drop (WTD) provides congestion avoidance at the ingress and egress queues
before a disruption occurs.
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Strict priority queuing guarantees that the highest-priority packets are serviced ahead of all
other traffic.
Security