Adjusting Mld Performance; Configuration Prerequisites; Configuring Router-Alert Option Handling Methods - HP 6125G Configuration Manual

Step
2. Enter interface view.
3. Configure the maximum number of
IPv6 multicast groups that the
interface can join.
NOTE:
This configuration takes effect for dynamically joined IPv6 multicast groups but not the statically
configured multicast groups.

Adjusting MLD performance

For the configuration tasks in this section:
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 MLD functions.
•
• 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.
•
Determine the DSCP value for MLD messages.
•

Configuring Router-Alert option handling methods

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
multicast groups that have no members on the local subnet. In this case, the Router-Alert option carried
in the IPv6 multicast packets is useful for the router to determine whether to deliver the IPv6 multicast
packets to the upper-layer protocol for processing. For more information about the Router-Alert option,
see RFC 21 13.
An MLD message is processed differently depending on whether it carries the Router-Alert option in the
IPv6 header, as follows:
Command
interface interface-type
interface-number
mld group-limit limit
269
Remarks
N/A
1000 by default.