R3102-R3103-HP 6600/HSR6600 Routers IP Multicast Configuration Guide

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 router reaches the upper limit, the router does not creates any more
forwarding entries until some entries time out or are removed.
If the number of existing IGMP snooping forwarding entries is larger than the upper limit that you set, the
router gives a prompt asking you to manually remove the excessive entries. In this case, the router does
not automatically remove any existing entries or create any new entries.
To set the maximum number of IGMP snooping forwarding entries:
Ste
p
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 The default limit is 1000.
Configuring IGMP snooping port functions
This section describes how to configure IGMP snooping port functions.
Configuration prerequisites
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 router receives no IGMP general queries or PIM hello messages on a dynamic router port when the
aging timer of the port expires, the router removes the port from the router port list.
If the router receives no IGMP reports for a multicast group on a dynamic member port when the aging
timer of the port expires, the router 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