Configuring igmp snooping port functions, Setting aging timers for dynamic ports, Setting aging timers for dynamic ports globally – H3C Technologies H3C S12500 Series Switches User Manual
Page 36
20
Setting the maximum number of IGMP snooping forwarding
entries
You can modify the maximum number of entries in the IGMP snooping forwarding table. When the
number of forwarding entries on the device reaches the upper limit, the device gives a prompt asking you
to manually remove the excessive entries. In this case, the device does not automatically remove any
existing entries or create any new entries.
To set the maximum number of IGMP snooping forwarding entries:
Step Command
Remarks
1.
Enter system view.
system-view
N/A
2.
Enter IGMP-snooping view.
igmp-snooping
N/A
3.
Set the maximum number of
IGMP snooping forwarding
entries.
entry-limit limit
2000 by default.
Configuring IGMP snooping port functions
Before you configure IGMP snooping port functions, complete the following tasks:
•
Enable IGMP snooping in the VLAN.
•
Configure the corresponding port groups.
•
Determine the aging timer for dynamic router ports.
•
Determine the aging timer for dynamic member ports.
•
Determine the multicast group and multicast source addresses.
Setting aging timers for dynamic ports
If a switch receives no IGMP general queries or PIM hello messages on a dynamic router port before the
aging timer of the port expires, the switch removes the port from the router port list.
If the switch receives no IGMP reports for a multicast group on a dynamic member port before the aging
timer of the port expires, the switch removes the port from the multicast forwarding entry for that multicast
group.
If the memberships of multicast groups change frequently, you can set a relatively small value for the
aging timer of the dynamic member ports. If the memberships of multicast groups change rarely, you can
set a relatively large value.
Setting aging timers for dynamic ports globally
Step Command
Remarks
1.
Enter system view.
system-view
N/A
2.
Enter IGMP-snooping view.
igmp-snooping
N/A
3.
Set the aging timer for the
dynamic router ports.
router-aging-time interval
105 seconds by default.