Access the multicast client with issue (usually the set-top box of an IPTV), and start
changing IPTV from one channel to the channel with the multicast issue (if any).
Every time a channel changes, the set-top box sends an IGMP Join for the new
channel as well an IGMP Leave for the old channel.
After performing an IGMP Join/Leave, proceed to step 5.
Did the Zyxel switch receive the IGMP Join/Leave from the
multicast client?
After you perform the IGMP join/leave, the multicast address should appear in the
multicast table. The appearance of the multicast address indicates that the switch
can successfully receive the IGMP join/leave.
Using Web GUI:
Figure 15 Advance Application > Multicast
Using CLI:
Figure 16 Enter CLI command “show multicast”
If the switch can receive the IGMP Join/Leave, proceed to step 6.
If the switch cannot receive the IGMP Join/Leave, ensure that IGMP snooping is
enabled and go to step 9.
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