H3C Technologies H3C S10500 Series Switches - Manual (Page 352)

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Setting the maximum number of IPv6 multicast groups that an
interface can join
Follow these steps to configure the maximum number of IPv6 multicast groups an interface can join:
To do… Use the command… Remarks
Enter system view system-view —
Enter interface view
interface interface-type
interface-number
—
Configure the maximum number of IPv6
multicast groups that the interface can
join
mld group-limit limit
Required
1000 by default.
NOTE:
This configuration takes effect for dynamically joined IPv6 multicast groups but not the statically
configured multicast groups.
Adjusting MLD performance
NOTE:
•
In MLD view, the configuration is effective globally. In interface view, the configuration is effective only on
the current interface.
• If the same function or parameter is configured in both MLD view and interface view, the configuration
performed in interface view is given priority, regardless of the configuration order.
Configuration prerequisites
Before adjusting MLD performance, complete the following tasks:
• Enable IPv6 forwarding and configure an IPv6 unicast routing protocol so that all devices in the
domain can be interoperable at the network layer
• Configure basic functions of MLD
• Determine the startup query interval
• Determine the startup query count
• Determine the MLD query interval
• Determine the MLD querier’s robustness variable
• Determine the maximum response delay of MLD general query messages
• Determine the MLD last listener query interval
• Determine the MLD other querier present interval
Configuring MLD message options
MLD queries include multicast-address-specific queries and multicast-address-and-source-specific queries,
and IPv6 multicast groups change dynamically, so a device cannot maintain the information for all IPv6
multicast sources and groups. Therefore, a router might receive IPv6 multicast packets addressed to IPv6