# Configuring IGMP snoop, proxy, and IGMP parameters on a VLAN

Use the following procedure to configure IGMP snoop, proxy, and IGMP parameters on a VLAN.

IGMP snoop and proxy are disabled by default.

Important

With IGMP snoop, the QueryInterval, Robustness, and Version values must match the values on the interface (VLAN) of the multicast router (IGMP querier).

## Procedure steps

1. From the navigation tree, double-click VLAN.

2. In the VLAN tree, double-click VLANs.

3. In the work area, click the Snoop tab.

4. In the table, double-click the cell under the Enable column heading.

5. Select true from the drop-down list to enable IGMP snoop for a VLAN.

6. In the table, double-click the cell under the ReportProxyEnable column heading.

7. Select true from the drop-down list to enable IGMP proxy for a VLAN.

8. Repeat these steps for the other column headings until you have amended all of the parameters you want to change.

9. In the toolbar, click Apply.

## Variable definitions

The following table describes the fields of the Snoop tab.

Field | Description
--- | ---
Id | Specifies the VLAN ID.
Name | Specifies the VLAN name.
ReportProxyEnable | Specifies the IGMP proxy status: enabled (true) or disabled (false).
Enable | Specifies the IGMP snoop status: enabled (true) or disabled (false).
Robustness | Specifies tuning for the expected packet loss of a network. This value is equal to the number of expected query packet losses for each query interval, plus 1. If you expect a network to lose query packets, you must increase the robustness value. Ensure that the robustness value is the same as the configured value on the multicast router (IGMP querier). The range is from 2–255, and the default is 2. The default value of 2 means that one query for each query interval can be dropped without the querier aging out.
QueryInterval | Specifies the frequency (in seconds) at which IGMP query packets are transmitted on the VLAN. Ensure that the query interval is the same as the configured value on the multicast router (IGMP querier). The range is from 1 to 65535, and the default is 125.
MRouterPorts | Specifies the statically-configured mrouter ports in the VLAN that provide connectivity to a nonquerier IP multicast router. Multicast data and group reports are forwarded out this port to the multicast router. You do not need to configure this parameter if only one multicast router exists on the VLAN.
Ver1MRouterPorts | Displays the mrouter ports in the VLAN that use IGMP version 1.
Ver2MRouterPorts | Displays the mrouter ports in the VLAN that use IGMP version 2.
ActiveMrouterPorts | Displays all dynamic (querier port) and static mrouter ports that are active on the interface.
ActiveQuerier | Displays the IP address of the multicast querier router.
QuerierPort | Displays the mrouter port on which the multicast querier router was heard.
MrouterExpiration | Specifies the time remaining before the multicast router ages out on this interface. If the switch does not receive queries before this time expires, it flushes out all group memberships known to the VLAN. The Query Max Response Interval (obtained from the queries received) is the timer resolution.