Cisco Catalyst 2960 Software Configuration Manual page 980

Feature Behavior Incompatibilities
RSPAN
•
The Catalyst 2950 switch uses an extra port, called the reflector port, for its RSPAN implementation.
This is not necessary in the Catalyst 2960 switch RSPAN implementation. The Catalyst 2960 switch
also supports VLANs as SPAN sources and can forward received packets on SPAN destination ports.
• Multicast
The multicast forwarding decisions on the Catalyst 2960 switch are based on IP addresses. Some
Catalyst 2950 switch workarounds to address platform limitations (such as the ip igmp snooping
source-only-learning global configuration command) are not required on the Catalyst 2960 switch.
Catalyst 2960 and 2960-S Switches Software Configuration Guide, Release 15.0(1)SE
A-6
Appendix A Recommendations for Upgrading a Catalyst 2950 Switch to a Catalyst 2960 Switch
OL-26520-01