H3C Technologies H3C S7500E Series Switches - Manual (Page 78)

3-7
Configuring the Maximum Number of Forwarding Entries in a
Multicast VLAN
You can configure the maximum number of entries in the IGMP Snooping forwarding table of a
multicast VLAN. When the number of forwarding entries maintained for a multicast VLAN
reaches the threshold, the device creates no more forwarding entries until some entries time
out or get manually removed.
Follow these steps to configure the maximum number of entries in the forwarding table
To do... Use the command... Remarks
Enter system view system-view —
Configure the maximum number
of forwarding entries in a
multicast VLAN
multicast-vlan entry-limit limit
Required
1000 by default.
If the number of existing entries in the IGMP Snooping forwarding table of a multicast VLAN is
larger than the limit when you configure it, the system informs you to remove excessive entries.
In this case, the system does not automatically remove any existing entries or create new
entries.
Displaying and Maintaining Multicast VLAN
To do… Use the command… Remarks
Display information about a
multicast VLAN
display multicast-vlan
[ vlan-id ]
Available in any view
Multicast VLAN Configuration Examples
Sub-VLAN-Based Multicast VLAN Configuration
Network requirements
z Router A connects to a multicast source through GigabitEthernet2/0/1 and to Switch A,
through GigabitEthernet 2/0/2.
z IGMPv2 is required on Router A, and IGMPv2 Snooping is required on Switch A. Router A
is the IGMP querier.
z Switch A’s GigabitEthernet 2/0/1 belongs to VLAN 10, GigabitEthernet 2/0/2 through
GigabitEthernet2/0/4 belong to VLAN 2 through VLAN 4 respectively, and Host A through