LevelOne GEP-1070, User Manual, Page: 147 / 319

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the last member query timer for that port.
When the conditions in the preceding item all apply, except that the receiving port is a
router port, then the switch will not send a GS-query, but will immediately start the last
member query timer for that port.
◆
Proxy Enabled
– Configures the switch to issue MLD host report messages on behalf of
hosts discovered through standard MLD interfaces. (Default: Disabled)
When MLD proxy is enabled, the switch exchanges MLD messages with the router on its
upstream interface, and performs the host portion of the MLD task on the upstream
interface as follows:
■
When queried, it sends multicast listener reports to the group.
■
When a host joins a multicast group to which no other host belongs, it sends unsolicited
multicast listener reports to that group.
■
When the last host in a particular multicast group leaves, it sends an unsolicited
multicast listener done report to the all-routers address (FF02::2) for MLDv1.
Port Related Configuration
◆
Port
– Port identifier.
◆
Router Port
–
Sets a port to function as a router port, which leads towards a Layer 3
multicast device or MLD querier. (Default: Disabled) If MLD snooping cannot locate the
MLD querier, you can manually designate a port which is connected to a known MLD
querier (i.e., a multicast router/switch). This interface will then join all the current multicast
groups supported by the attached router/switch to ensure that multicast traffic is passed to
all appropriate interfaces within the switch.
◆
Fast Leave
–
Immediately deletes a member port of a multicast service if a leave packet
is received at that port. (Default: Disabled)
The switch can be configured to immediately delete a member port of a multicast service if
a leave packet is received at that port and the Fast Leave function is enabled. This allows
the switch to remove a port from the multicast forwarding table without first having to send
an MLD group-specific (GS) query to that interface.
If Fast Leave is not used, a multicast router (or querier) will send a GS-query message
when a group leave message is received. The router/querier stops forwarding traffic for
that group only if no host replies to the query within the specified timeout period.
If Fast Leave is enabled, the switch assumes that only one host is connected to the
interface. Therefore, Fast Leave should only be enabled on an interface if it is connected to
only one MLD-enabled device, either a service host or a neighbor running MLD snooping.
Fast Leave does not apply to a port if the switch has learned that a multicast router is