ZyXEL Communications ES 3500 Series Troubleshooting Manual page 65

The CLI shows a "No last querier is found".
Using CLI:
Figure 2
*The "No last querier is found" only means that there are no other active
IGMP queriers in the network. This does not indicate whether this device is the
active IGMP querier.
If both indicates that the switch is the active querier, go to step 3.
If both does not indicate that the switch is the active querier, go to step 8.
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