Cisco Systems 2950SX-24, 2950SX-48, 2950-24, 2950T-48 Product Features and Benefits, Availability

Product Features and Benefits

Feature	Benefit
Availability
Superior redundancy	• IEEE 802.1D Spanning Tree Protocol support for redundant backbone connections and
for fault backup	loop-free networks simplifies network configuration and improves fault tolerance.
	• Support for Cisco Spanning Tree Protocol enhancements such as UplinkFast,
	BackboneFast, and PortFast technologies ensures quick failover recovery and enhances
	overall network stability and availability.
	• Support for an optional 675W redundant Cisco AC power system provides a backup
	power source for as many as four units or six units, respectively, for improved fault
	tolerance and network uptime.
	• Unidirectional link detection (UDLD) and aggressive UDLD detect and disable
	unidirectional links on fiber-optic interfaces caused by incorrect fiber-optic wiring or
	port faults.
Integrated Cisco IOS	• Bandwidth aggregation through Cisco EtherChannel technology enhances fault tolerance
Software features	and offers higher-speed aggregated bandwidth between switches to routers and
for bandwidth	individual servers. Port Aggregation Protocol (PagP) is available to simplify configuration.
optimization	• VLAN1 minimization allows VLAN1 to be disabled on any individual VLAN trunk link.
	• Per-port broadcast, multicast, and unicast storm control prevents faulty end stations from
	degrading overall system performance.
	• Per VLAN Spanning Tree Plus (PVST+) allows for Layer 2 load sharing on redundant links
	to efficiently use the extra capacity inherent in a redundant design.
	• 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.
	Dynamic Trunking Protocol (DTP) enables dynamic trunk configuration across all ports in
	the switch.
	• IGMPv3 snooping provides for fast client joins and leaves of multicast streams and limits
	bandwidth-intensive video traffic to the requestors. MVR, IGMP filtering, and fast-join and
	immediate leave are available as enhancements.

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