Configuring Simulated Joining; Configuring Fast-Leave Processing - HP A5500 SI Switch Series Configuration Manual

NOTE:
An IPv6 static (S, G) entry for a port takes effect only if a valid IPv6 multicast source address is
specified and MLDv2 snooping runs.
A static member port does not respond to queries from the MLD querier. When a static (*, G) or (S,
G) entry is configured or removed for a port, the port does not send an unsolicited MLD report or an
MLD done message.
Static member ports and static router ports never age out. To remove such a port, you use the
corresponding undo command.

Configuring simulated joining

Generally, a host that runs MLD can respond to MLD queries that the MLD querier sends. If a host fails to
respond, the multicast router deems that no member of this IPv6 multicast group exists on the network
segment, and removes the corresponding forwarding path.
To avoid this situation, you can enable simulated joining on a port of the switch. That is, you can
configure the port as a simulated member host for an IPv6 multicast group. When the simulated member
host receives an MLD query, it gives a response. Therefore, the switch can continue receiving IPv6
multicast data.
A simulated host acts like a real host in the following ways:
When a port is configured as a simulated member host, the switch sends an unsolicited MLD report
•
through the port, and can respond to MLD general queries with MLD reports through the port.
When the simulated joining function is disabled on a port, the switch sends an MLD done message
•
through that port.
Follow these steps to configure simulated joining:
To do...
Enter system view
Enter Ethernet interface view,
Layer 2 aggregate interface view,
or port group view
Configure simulated joining
NOTE:
A simulated host is equivalent to an independent host. For example, when a simulated member host
receives an MLD query, it gives a response separately.
Unlike a static member port, a port that you configure as a simulated member host ages out like a
dynamic member port.

Configuring fast-leave processing

The fast-leave processing feature enables the switch to process MLD done messages quickly. When the
fast-leave processing feature is enabled and the switch receives an MLD done message on a port, the
Use the command...
system-view
interface interface-type interface-
number
port-group manual port-group-
name
mld-snooping host-join ipv6-
group-address [ source-ip ipv6-
source-address ] vlan vlan-id
250
Remarks
—
Required
Use either approach
Required
Not configured by default