A new stable switchCatalyst firmware version is available. Firmware CS 17.2.1 was just released on 2025-03-24 and has been in this firmware category since 2025-03-24.
Factory-default VLAN range is now 1-995, instead of 1-1000 as in previous firmware versions. Resetting the device to factory settings will apply this new VLAN range.
This version's IOS image is based on 17.12.4 CCO. Upgrades to this version will result in a full system reload.
New feature highlights
Client Analytics
Device Uptime for MS390s
EEE (Energy Efficient Ethernet) Support
Multi-auth with support for guest/failed/critical
RADIUS Caching
Support for Multicast in Live Tool
VLAN to SGT mapping
General fixed issues
Introduced measures to significantly decrease occurrences of the Meraki container becoming trapped in a reboot loop while switches maintain data traffic flow. This scenario may still occur in rare cases.
Corrected an issue that caused stack ports to be incorrectly displayed as "Disconnected" after a stack member was rebooted
Fixed a bug that caused the Static Gateway IP to display as '0.0.0.0' in the L3 Routing Switch tab
Resolved an issue that occasionally caused uplink ports to become stuck in an Uninitialized state
Fixed a bug that caused a brief period of L3 traffic loss after the active member of a stack failed over
Ms390 fixed issues
Resolved an issue that prevented the application of fixed IP assignments if the IP being assigned had an active DHCP lease
Fixed a bug that would infrequently prevent MS390 stacks from converging after a failover
C9300 known issues
Some C9300X stacks have been reported to fail due to memory exhaustion, requiring an ios restart to restore service
General known issues
Meraki native switches move LACP ports to an active forwarding state if configured. This can cause loops when connecting to an MS390 or other Catalyst switch unless the bundles are configured on the Catalyst side first. All Meraki native ports are configured in passive LACP mode so that loops do not occur between Meraki native switches (always present)
Ms390 known issues
In rare circumstances, MS390 stacks may display UDLD loop detection alerts that cannot be cleared by cycling the looping port
MS390s may display an alert, "A power supply is offline" when a PSU isn't installed in the second slot
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