Concept Guide

The Status dialog box appears displaying the results of the port assignments. You can click
Configure Another Port to return to the Link Aggregation Group (LAG) dialog box and configure
more internal port assignments for LAGs or click Close to return to the Switching Layer-2 page.
IGMP
In the IGMP section of the Switching Layer-2 page, you can configure Internet Group Management
Protocol (IGMP).
Multicast is based on identifying many hosts by a single destination IP address. Hosts that the same IP
address represents are a multicast group. IGMP is a Layer 3 multicast protocol that hosts use to join or
leave a multicast group. Multicast routing protocols (such as protocol-independent multicast [PIM]) use
the information in IGMP messages to discover which groups are active and to populate the multicast
routing table.
This page displays whether the following settings are enabled or disabled:
• IGMP Snooping Status — IGMP snooping enables switches to use information in IGMP packets to
generate a forwarding table that associate ports with multicast groups, so that the received multicast
frames are forwarded only to interested receivers.
• IGMP Flood Restrict — When enabled, unregistered multicast data traffic is forwarded to only
multicast router ports on all VLANs. If there is no multicast router port in a VLAN, unregistered
multicast data traffic is dropped.
In this section you can configure IGMP settings.
Configuring IGMP Settings
In the IGMP section of the Switching Layer-2 page, you can configure IGMP flood restrict.
1. From the navigation menu, click Switching Layer-2.
The Switching Layer-2 page appears.
2. In the IGMP section, click Edit.
The IGMP dialog box appears.
3. Select Enabled or Disabled for the following feature:
• IGMP Flood Restrict — When enabled, unregistered multicast data traffic is forwarded to only
multicast router ports on all VLANs. If there is no multicast router port in a VLAN, unregistered
multicast data traffic is dropped.
4. Click Apply.
Port Mirroring
You can view and configure port mirroring settings in the Port Mirroring section of the Switching Layer-2
page.
In most situations, switches only forward frames to relevant ports. To monitor traffic, either for
information gathering, such as statistical analysis, or for troubleshooting higher-layer protocol operation,
the port mirroring feature forwards frames to a monitoring port. This feature c to specify that a desired
destination (target) port receives a copy of all traffic passing through designated source ports. The frames
arriving at the destination port are copies of the frames passing through the source port at ingress, prior
to any switch action.
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