A new stable switchCatalyst firmware version is available. Firmware CS 17.2.3 was just released on 2025-09-26 and has been in this firmware category since 2025-09-26.
This version's IOS XE image is based on 17.12.4 CCO. Upgrades to this version will result in a full system reload.
New feature highlights
EEE (Energy Efficient Ethernet) Support
RADIUS Caching
Device Uptime for MS390s
Multi-auth with support for guest/failed/critical
VLAN to SGT mapping
Client Analytics (parity)
Support for Multicast in Live Tool
Fixed issues
Resolved a bug that occasionally caused the Meraki container to reboot and temporarily lose Dashboard connectivity
Fixed a bug that sometimes caused longer than expected boot times, and in very rare circumstances could cause switches to fail to communicate with Dashboard
General known issues
Client traffic reporting may fail on high-speed (greater than 10Gbps) or trunk ports
C9300 known issues
In rare circumstances, high levels of MAC flapping can lead to memory exhaustion in C9300X switches in stack configurations. An iosxe restart is required to restore service to affected switches.
Ms390 known issues
MS390s may display an alert, "A power supply is offline" when a PSU isn't installed in the second slot
Clients may fail to obtain a fixed IP address if their DHCP discover packet doesn't contain a client identifier field. These clients will instead be assigned an IP address from the DHCP pool.
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