A new stable switch firmware version is available. Firmware MS 16.8 was just released on 2024-02-28 and has been in this firmware category since 2024-04-22.
If DAI is enabled prior to upgrading the network to MS 16, ensure that trusted ports and/or DAI-allow lists are configured prior to upgrading to avoid potential network outages.
Ms420 important notes
Devices configured for this version will run MS 15.22
New feature highlights
ACL hit counter
DHCPv6 and IPv6 RA guard
Local Status Page Packet Capture
New ms12x feature highlights
DAI support
Fixed issues
A stack containing more than 10 LACP bundles may encounter a brief network loop when a stack member is rebooted (present since MS 15)
Fixed LACP discarding state on cross-stack member link aggregation ports after active switch reboot
Improved STP performance by updating STP forward state after link-aggregation interface state is programmed in hardware
Performance optimization for generating Support-Data-Bundles on offline nodes, reducing completion time
Ms120 fixed issues
Fixed a rare bug that caused some switches to reboot persistently, fail firmware upgrades, or lose Dashboard connection after a reboot
Resolved access issues to the Local Status Page of MS120s via Management Port
Ms130 fixed issues
Fixed a bug preventing MS130Rs from powering more than 6 802.3bt PD devices
Fixed device reachability during control plane policing tests
Ms350 fixed issues
Resolved an issue preventing MS350s from providing power to 802.3at Class 4 devices
Ms425 fixed issues
Addressed an issue where OSPF Adjacency was stuck in the Exchange state during OSPF/BIRD initialization
General known issues
Multicast routing may stop functioning after a cross-stack link aggregation disruption
RADIUS authentication failures are possible at boot when Guest VLAN is configured
RADIUS communications may not recover after an initial failure when Critical Auth is enabled
Stack port configurations may become isolated or changed upon multiple flaps or when disabled
Switches move LACP ports to an active forwarding state if configured. This can cause loops when connecting to an MS390 or other Catalyst switches unless the bundles are configured on the MS390/Catalyst switches first. All non-catalyst ports are configured in passive LACP mode so that loops do not occur between Meraki switches (always present)
Ms120 known issues
Some MS120 switches might not complete firmware upgrades, causing them to revert to previous firmware, and attempt to upgrade every 2 hours
Switches may fail to provide PoE power to legacy access points (always present)
Ms210 known issues
Stack ports have an orange LED instead of green (present since MS 11)
Ms250 known issues
Interruptions to aggregate links initiated by restarts or reconnection may produce unexpected LACP discarding states
Stack nodes may erroneously report "MAC Table Full" errors
Ms2xx/35x/4xx known issues
Switch stacks will learn MAC addresses from ports in the STP blocking state which can trigger a constant flood of MAC flaps in the event log
Ms35x known issues
In rare instances, stack ports fail to initialize after an upgrade (always present)
Incorrect SFP port mappings may disrupt SFP functionality
Switches may experience an unexpected reboot (present since MS 15)
UPoE does not negotiate over LLDP correctly (always present)
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. For example, MS355 switch ports will incorrectly show an amber light for 1G, 2.5G, and 5G, but will show a green light for 10G.
Ms425 known issues
MS425 stacks may become unresponsive under high load
MS425 stacks may fail to add mac addresses for stack member aggregate ports across multicast groups
Ms4xx known issues
When an SFP module is inserted/removed, BPDUs can be delayed leading to STP transitions in the network (predates MS 12)
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