Specifying The Igmp Snooping Version; Setting The Maximum Number Of Igmp Snooping Forwarding Entries; Configuring Parameters For Igmp Queries And Responses - HP 5920 series Configuration Manual

Specifying the IGMP snooping version

Different versions of IGMP snooping can process different versions of IGMP messages.
IGMPv2 snooping can process IGMPv1 and IGMPv2 messages, but it floods IGMPv3 messages in
•
the VLAN instead of processing them.
• IGMPv3 snooping can process IGMPv1, IGMPv2, and IGMPv3 messages.
If you change IGMPv3 snooping to IGMPv2 snooping, the device does the following:
• Clears all IGMP snooping forwarding entries that are dynamically added.
Keeps static IGMPv3 snooping forwarding entries (*, G).
•
Clears static IGMPv3 snooping forwarding entries (S, G), which will be restored when IGMP
•
snooping is switched back to IGMPv3 snooping.
For more information about static IGMP snooping forwarding entries, see
To specify the IGMP snooping version:
Step
1. Enter system view.
2. Enter VLAN view.
3. Specify the version of IGMP
snooping.
Setting the maximum number of IGMP snooping forwarding
entries
You can modify the maximum number of IGMP snooping forwarding entries. When the number of
forwarding entries on the device reaches the upper limit, the device does not automatically remove any
existing entries or create new entries until some entries time out or are removed. In this case, HP
recommends that you manually remove the excessive entries.
To set the maximum number of IGMP snooping forwarding entries:
Step
1. Enter system view.
2. Enter IGMP-snooping view.
3. Set the maximum number of
IGMP snooping forwarding
entries.

Configuring parameters for IGMP queries and responses

When a multicast listening host receives an IGMP query (general query or group-specific query), it starts
a timer for each multicast group that it has joined. This timer is initialized to a random value in the range
of 0 to the maximum response time advertised in the IGMP query message. When the timer value
decreases to 0, the host sends an IGMP report to the multicast group.
Command
system-view
vlan vlan-id
igmp-snooping version
version-number
Command
system-view
igmp-snooping
entry-limit limit
18
"Configuring static
Remarks
N/A
N/A
The default setting is IGMPv2
snooping.
Remarks
N/A
N/A
The default setting is
4294967295.
ports."