WAGO 852-1305 Manual page 59

WAGO-ETHERNET-Zubehör 852
852-1305 8/4-Port 100BASE-T/1000BASE-SX/LX
Fast Leave
The switch allows you to configure a delay time. When the delay time is expired,
the switch deletes the interface from the multicast group.
Last Member Query Interval
The "Last Member Query Interval" is the maximum response time in group-
specific queries sent in response to "Leave Group" messages, and also shows the
time between group-specific query messages.
If the switch receives an "IGMP Leave Message" from a subscriber on a receiver
port without the "Immediate Leave" function being enabled, the switch sends an
IGMP-specific query on this port and waits for IGMP group membership reports.
If the switch receives no messages within a configured period, the receiver port is
removed from the multicast group.
IGMP Querier
There is normally only one "Querier" per physical network. All multicast routers
start up as a "Querier" on each attached network. If a multicast router receives a
"Query Message" from a router with a lower IP address, it MUST become a non-
"Querier" in that network. If a router does not receive any "Query Messages"
from another router over a certain period of time ["Other Querier Present
Interval"], it assumes the role of "Querier". Routers periodically ["Query
Interval"] send a "General Query" in all attached networks for which the router is
the "Querier" to solicit membership information. At startup, a router SHOULD
send ["Startup Query Count"] "General Queries" spaced closely together
["Startup Query Interval"] to quickly and reliably determine membership
information. A "General Query" is addressed to an all-systems multicast group
(224.0.0.1), has a group address field of 0 and has a maximum response time of
["Query Response Interval"].
Manual
1.1.0
Enhanced Features 59