There are a lot of known issues with this version. I can try to update to the last stable version. KNOWN ISSUES Stacks with a large number of LACP bundles (10+) may fail to initialize stack ports properly requiring additional reboots to regain connectivity MA-SFP-1GB-TX modules may fail to be detected after link loss (always present) Port modules may show incorrect information due to incorrectly reading CDP information Stack members may go offline after a stacking cable is reconnected requiring a power cycle (present since MS 12) MS120 in rare instances will not be able to perform packet captures until rebooted (predates MS 12.28) MS210/250 series switches may fail to relearn client MACs on ports that have access policies configured (present since MS 12) Links being established on an MS120 can result in neighboring ports to flap (present since MS 11) In very rare instances, MS120 series switches will reboot every 10 min (present since MS 12) Enabling Combined Power on MS350/355 switches results in events being logged once per minute (present since MS 11) Stack members are not being marked to update their configuration when changes are made on other members mGig switches will have an amber light for all physical ports that do not negotiate to the highest supported speed. Dashboard will continue showing a light green status for all ports above 100Mbps. Example, MS355 switch ports will incorrectly show an amber light for 1G, 2.5G, and 5G, but will show a green light for 10G. Cable test tool returns wrong pairs for 100Mbps connections (predates MS 12) Broadcast types of traffic can leak into the Guest VLAN if a port that fails authentication has a Voice VLAN configured, and dashboard has a Guest VLAN defined (present since MS 11) MS120s switch ports with MAB authentication may randomly deauthenticate clients. In order to resume client authentication on that port, a switch reboot is required (present since MS 12) MS350-24X and MS355 series switches do not negotiate UPoE over LLDP correctly (predates MS 10) Ports with an odd-numbered MTU value fail to initialize for MS120/125 series switches (predates MS 11) When an SFP module is inserted/removed on MS420/425 series switches, BPDUs can be delayed leading to STP transitions in the network (predates MS 12)
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