Chapter 18 Multicast
PMG5318-B20B User’s Guide
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Query Interval
Specify how many seconds since the last query the GPON Device waits before it queries
all directly connected networks to gather multicast group membership.
Query Response
Interval
Enter the maximum number of seconds the GPON Device can wait to receive a General
Query message. Multicast routers use general queries to learn which multicast groups
have members.
Last Member Query
Interval
Enter the maximum number of seconds the GPON Device can wait for receiving a
response to a Group-Specific Query message. Multicast routers use group-specific
queries to learn whether any member remains in a specific multicast group.
Robustness Value
Enter the number of times (1~7) the GPON Device can resend a packet if packet loss
occurs due to network congestion.
Maximum Multicast
Groups
Enter a number to limit the number of multicast groups an interface on the GPON
Device is allowed to join. Once a multicast member is registered in the specified
number of multicast groups, any new IGMP or MLD join report frames are dropped by
the interface.
Maximum Multicast
Data Sources
Enter a number to limit the number of multicast data sources (1-24) a multicast group
is allowed to have. Note: The setting only works for IGMPv3 and MLDv2.
Maximum Multicast
Group Members
Enter a number to limit the number of multicast members a multicast group can have.
Fast Leave Enable
Select this option to set the GPON Device to remove a port from the multicast tree
immediately (without sending an IGMP or MLD membership query message) once it
receives an IGMP or MLD leave message. This is helpful if a user wants to quickly
change a TV channel (multicast group change) especially for IPTV applications.
Apply/Save
Click this button to save your changes.
Table 65
Multicast (continued)
LABEL
DESCRIPTION
