IGMP Cache
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Group Address Intf Reporter Up Time Expire V1 Timer
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Parameter | Description |
Group Address | An IP multicast group address with subscribers directly attached or |
| downstream from this switch. |
Intf | The IP interface on this switch that has received traffic directed to the |
| IP multicast group address (see chapter 2 “Displaying Subnet |
| Information”). |
Reporter | IP address of the source of the last membership report received for |
| this multicast group on this interface. If no membership report has |
| been received, this object has the value 0.0.0.0. |
Up Time | The time elapsed since this entry was created. |
Expire | The time remaining before this entry will be aged out. (The default is |
| 260 seconds.) |
V1 Timer | The time remaining until the switch assumes that there are no longer |
| any IGMP Version 1 members on the IP subnet attached to this |
| interface. (The default is 400 seconds.) |
| If the switch receives an IGMP Version 1 Membership Report, it sets a |
| timer to note that there are Version 1 hosts present which are |
| members of the group for which it heard the report. |
| If there are Version 1 hosts present for a particular group, the switch |
| will ignore any Leave Group messages that it receives for that group. |
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Displaying the Multicast Forwarding Cache
The switch maintains a cache of multicast routing entries used to calculate the delivery tree in multicast routing protocols. The Multicast Forwarding Cache includes the subnetwork that contains the multicast source and the nearest upstream neighbor for
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