HP MSR4080 Configuration Guide

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If a match is found but the receiving port is not an outgoing interface in the forwarding entry, the
Layer 2 device discards the MLD done message.
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If a match is found and the receiving port is not the only outgoing interface in the forwarding
entry, the Layer 2 device performs the following actions:
 Discards the MLD done message.
 Sends an MLD multicast-address-specific query to identify whether the group has active
listeners attached to the receiving port.
 Sets the aging timer for the receiving port to twice the MLD last listener query interval.
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If a match is found and the receiving port is the only outgoing interface in the forwarding entry,
the Layer 2 device performs the following actions:
 Forwards the MLD done message to all router ports in the VLAN.
 Sends an MLD multicast-address-specific query to identify whether the group has active
listeners attached to the receiving port.
 Sets the aging timer for the receiving port to twice the MLD last listener query interval.
After receiving the MLD done message on a port, the MLD querier resolves the IPv6 multicast group
address in the message. Then, it sends an MLD multicast-address-specific query to the IPv6
multicast group through the receiving port.
After receiving the MLD multicast-address-specific query, the Layer 2 device forwards the query
through all its router ports in the VLAN and all member ports of the IPv6 multicast group. Then, it
waits for the responding MLD report from the directly connected hosts. For the dynamic member port
that received the done message, the Layer 2 device also performs one of the following actions:
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If the port receives an MLD report before the aging timer expires, the Layer 2 device resets the
aging timer for the port.
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If the port does not receive any MLD report messages when the aging timer expires, the Layer
2 device removes the port from the forwarding entry for the IPv6 multicast group.
Protocols and standards
RFC 4541, Considerations for Internet Group Management Protocol (IGMP) and Multicast Listener
Discovery (MLD) Snooping Switches
Compatibility information
Feature and hardware compatibility
This feature is supported only on the following ports:
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Layer 2 Ethernet ports on the following modules:
 HMIM-8GSW.
 HMIM-24GSW.
 HMIM-24GSW-PoE.
 SIC-4GSW.
 SIC-9FSW.
 SIC-9FSW-PoE.
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Fixed Layer 2 Ethernet ports on the following routers:
 MSR1002-4/1003-8S.
 MSR2004-24/2004-48.
 MSR954 (JH296A/JH297A/JH298A/JH299A/JH373A).

HP MSR4080 Specifications

General

Brand	HP
Model	MSR4080
Category	Network Router
Language	English