Standard Image IOS

The SI is installed on the 2950SX-24, 2950-12, and 2950-24. The SI supports basic IOS functionality,
and includes functionality to support basic data, video, and voice services at the access
layer. In addition to basic layer 2 switching services, the SI supports

IGMP snooping

L2 CoS classification

255 multicast groups

8000 MAC addresses in up to 64 VLANs