Cisco WS-C4900M - Page 22

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Cisco Campus Feature Comparison (continued)
Modular Switches
Model/Series Nexus 7000 Catalyst 6500 Catalyst 4500
Availability and Resiliency
Switch Redundancy
Virtual Switching System (VSS) •
Virtual Port Channel (vPC) •
Software Modularity • •
Non-stop Forwarding/Stateful Switchover
(NSF/SSO)
• • •
NSF-aware • • •
Redundant Power Supplies • • •
Redundant Fans • • •
Redundant Fan Trays • • •
Redundant Supervisors • • •
Generic Online Diagnostics (GOLD) • • •
Basic Support for GOLD Services • • •
Power Supply Failure Redundancy • • •
Power Circuit Failure Redundancy • • •
StackWise Plus N/A
StackPower N/A
Network Protocols
Unidirectional Link Detection (UDLD) • • •
Gateway Load Balancing Protocol (GLBP) • • •
Hot Standby Routing Protocol (HSRP) • • •
Virtual Router Redundancy Protocol
(VRRP)
• • •
UplinkFast • •
Backbone Fast • •
RSTP (802.1w) • • •
PortFast • • •
Per VLAN STP (PVSTP) • • •
Per VLAN RSTP (PVRSTP) • • •
Multiple Instance STP (MISTP) • • •
MSTP (802.1s) • • •
STP Root Guard • • •
BDPU Guard • • •
Loop Guard • • •
Introduction