Manual

108 - IGMP Query RocketLinx ES7528 User Guide: 2000509 Rev. C
Configuration Using the Web Interface
IGMP Query
Use this page to configure the IGMP Query feature. Since the ES7528
can only be configured by member ports of the management VLAN, the
IGMP Query can only be enabled on the management VLAN. If you
want to run IGMP Snooping feature in several VLANs, first check to
see whether each VLAN has its own IGMP Querier.
The IGMP querier periodically sends query packets to all end-stations
on the LANs or VLANs that are connected to it. For networks with
more than one IGMP querier, a switch with the lowest IP address
becomes the IGMP querier.
Unknown Multicast
This page allows you to decide how to forward the unknown multicast traffic. After
enabling IGMP Snooping, the known multicast can be filtered by IGMP Snooping
mechanism and forwarded to the member ports of known multicast groups. The other
multicast streams that are not learned are-called unknown multicasts, the ES7528
decides how to forward them based on the setting on this page.
IGMP Query Page
Version
Select Version 1, Version 2 or Disable.
• Version 1 means IGMP V1 General Query
• Version 2 means IGMP V2 General Query. The query is forwarded to all
multicast groups in the VLAN.
• Disable allows you to disable IGMP Query.
Query Interval(s)
The period of query (seconds) sent by querier. Enter a number between 1
and 65,535.
Query Maximum
Response Time
The span querier detect (seconds) to confirm there are no more directly
connected group members on a LAN. Enter a number between 1 and 25.
Apply
Click Apply to apply the settings.
Note: You must Save the settings (Page 136
), if you want to maintain these
settings if the ES7528 is powered off.
UnKnown Multicast Page
Send to Query
Ports
The unknown multicast is sent to the Query ports. The
Query port means the port received the IGMP Query
packets. It is usually the uplink port of the switch.
Send to All Ports
The unknown multicast is flooded on all ports even if they
are not member ports of the groups.
Discard
The unknown multicast is discarded. Non-member ports
do not receive the unknown multicast streams.
Apply
Click Apply to apply the settings.
Note: You must Save the settings (Page 136
), if you want
to maintain these settings if the ES7528 is powered
off.