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The device always performs
MAC Multicast Support
Multicast service is a limited broadcast service, which allows
For more information, see "Assigning Multicast Forward All Parameters."
Layer 2 Features
IGMP Snooping
Internet Group Membership Protocol (IGMP) Snooping examines IGMP frame contents, when they are forwarded by the device from work stations to an upstream Multicast router. From the frame, the device identifies work stations configured for Multicast sessions, and which Multicast routers are sending Multicast frames. IGMP Querier simulates the behavior of a multicast router; this allows snooping of the layer 2 multicast domain even if there is no multicast router.
For more information, see "IGMP Snooping."
Port Mirroring
Port mirroring monitors and mirrors network traffic by forwarding copies of incoming and outgoing packets from a monitored port to a monitoring port. Users specify which target port receives copies of all traffic passing through a specified source port.
For more information, see "Defining Port Mirroring Sessions."
Broadcast Storm Control
Storm Control enables limiting the amount of Multicast and Broadcast frames accepted and forwarded by the device.
When Layer 2 frames are forwarded, Broadcast and Multicast frames are flooded to all ports on the relevant VLAN. This occupies bandwidth, and loads all nodes connected on all ports.
For more information, see "Enabling Storm Control."
20
Introduction