# Displaying IGMP cache information

Use this procedure to display IGMP cache information to show the learned multicast groups in the cache and the IGMPv1 version timers.

## Procedure steps

1. From the navigation tree, double-click IP Routing.

2. In the IP Routing tree, double-click IGMP.

3. In the work area, click the Cache tab to view the IGMP cache information.

## Variable definitions

The following table describes the fields of the Cache tab.

Field | Description
--- | ---
Address | Indicates the IP multicast group address.
IfIndex | Indicates the VLAN interface from which the group address is heard.
LastReporter | Indicates the last IGMP host to join the group.
ExpiryTime | Indicates the amount of time (in seconds) that remains before this entry ages out.
Version1Host Timer | Indicates the time that remains until the local router assumes that no IGMP version 1 members exist on the IP subnet that attaches to the interface. Upon hearing an IGMPv1 membership report, this value is reset to the group membership timer. When the time remaining is nonzero, the local interface ignores IGMPv2 Leave messages that it receives for this group.
Type | Indicates whether the entry is learned dynamically or is added statically.