H3C S5500-EI User Manual

36
Ste
p
Command Remarks
3. Set the maximum number of
multicast groups that a port
can join.
igmp-snooping group-limit limit
[ vlan vlan-list ]
By default, the upper limit is 2000
for the S5500-EI switches, and
1000 for the S5500-SI switches.
Enabling multicast group replacement
For various reasons, the number of multicast groups that the switch or a port joins might exceed the upper
limit. In addition, in some specific applications, a multicast group that the switch newly joins must replace
an existing multicast group automatically. A typical example is channel switching. To view a new channel,
a user switches from the current multicast group to the new one.
To realize such requirements, you can enable the multicast group replacement function on the switch or
on a certain port. When the number of multicast groups that the switch or on the port has joined reaches
the limit, one of the following occurs:
• If the multicast group replacement feature is disabled, new IGMP reports are automatically
discarded.
• If the multicast group replacement feature is enabled, the multicast group that the switch or a port
newly joins automatically replaces an existing multicast group that has the lowest address.
IMPORTANT:
In the configuration, be sure to configure the maximum number of multicast groups allowed on a port (see
"Setting the maximum number of multic
ast groups that a port can join") before enablin
g
multicast
g
roup
replacement. Otherwise, the multicast group replacement functionality will not take effect.
Enabling multicast group replacement globally
Ste
p
Command Remarks
1. Enter system view.
system-view N/A
2. Enter IGMP-snooping view.
igmp-snooping N/A
3. Enable multicast group
replacement.
overflow-replace [ vlan vlan-list ] Disabled by default
Enabling multicast group replacement on a port
Ste
p
Command Remarks
1. Enter system view.
system-view N/A

H3C S5500-EI Specifications

General

Brand	H3C
Model	S5500-EI
Category	Switch
Language	English