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17
requirement and case:
On CO side, there must be at least one IGMP querier (router) present. IGMP querier •
will send IGMP query packet. The ADSL modem is responsible to relay these IGMP
query to Ethernet.
End• -user multicast application device send IGMP report while receiving IGMP query
or being activated by user, the ADSL modem should be responsible to proxy (that is,
change source IP to ADSL modem’s WAN IP) the IGMP report to ADSL WAN side,
include all PVCs. The same case is for IGMP leave packet.
It is not necessary to relay • multicast routing between two ADSL PVCs or two
interfaces in LAN side.
Special purpose multicast packet (such as RIP 2 packet) should run without •
interference.
Table 4-1 IGMP packets process
Note: Before the IGMP mode is enabled; please go to the Miscellaneous Configuration page
to enable the IGMP proxy. Otherwise, the IGMP selection will not be valid.
Table 4-1 WAN configurations Overview
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