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3Com Switch 7750 Series
Command Reference Guide – Multicast Chapter 4 IGMP Configuration Commands
4-5
By default, 256 IGMP groups are added to a VLAN interface.
The new configuration overwrites the old one if you run the command for a second
time.
Caution:
z New groups cannot be added when the number of IGMP multicast groups has
exceeded the configured limit.
z If the number of existing multicast groups on the interface is more than the
configured limit, the system will remove some old groups automatically to satisfy the
configured limit.
Example
# Limit the maximum number of IGMP groups on Vlan-interface10 to 100.
<3Com> system-view
System View: return to User View with Ctrl+Z.
[3Com] interface Vlan-interface 10
[3Com-Vlan-interface10] igmp group-limit 100
4.1.5 igmp group-policy
Syntax
igmp group-policy acl-number [ 1 | 2 | port interface-list ]
undo igmp group-policy [ port interface-list ]
View
VLAN interface view
Parameter
acl-number: Number of the basic IP access control list number, defining a multicast
group range. The value ranges from 2000 to 2999.
1: IGMP version 1.
2: IGMP version 2. If IGMP version is not specified, version 2 will be used by default.
port: Limits the IGMP packets passing the port and matching with the ACL rules.
interface-list: Forwarding port list in the form of interface-list = { interface-type
interface-number [ to { interface-type interface-number } ] }&<1-10>. The interface-type
argument refers to the port type, and the interface-number argument refers to the port
number. For the meanings and ranges of the two arguments, refer to the parameter
descriptions in part “Port Basic Configuration” in this manual.