I have the following topology: internet---MX67---switch1---switches2 and 3 I've been having trouble with switch1 (a MS120-8P) where it would randomly go offline following a software upgrade (switch would upgrade, come back online, then die 10-20ish or so minutes later), so support RMA'ed the switch. The replacement had been working fine until I realized the IGMP querier wasn't configured on the replacement. So, I reconfigured the IGMP querier. I've got 5 VLANs (1,10,20,30,40) so I enabled it on all five. 18 minutes after the configuration change was made the switch stopped forwarding traffic. A few minutes after that, it rebooted itself. This is the EXACT behavior of the switch that was RMA'ed. Has anyone had any trouble with the IGMP querier running on the MS120? I'm running 12.27 on the switches. For what its worth, switch1 is the STP root (priority 0) and switches 2 and 3 are priority 4096. There are no cabling loops in the network. I have a new case open with support with this new detail (enabling the querier killed it), but I thought I'd ask here too.
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