A new candidate switch firmware version is available. Firmware MS 18.1.3.1 was just released on 2025-10-28 and has been in this firmware category since 2025-10-28.
Local Status Page connectivity diagnostics enhancements
Layer 2 multicast live tool
Traffic Mirroring: RSPAN & VLAN Based SPAN
General fixed issues
Fixed a bug that sometimes caused switches in stack configurations to fail to remove older entries from the MAC forwarding table
Ms150 fixed issues
Resolved an issue that caused some wireless clients to lose connectivity when roaming between access points connected to different members of the same switch stack
Fixed a bug that sometimes caused MS150s to experience transmission errors and lose connectivity until they were rebooted
Ms425 fixed issues
Resolved an issue that caused clients authenticating via 802.1X with an access policy using hybrid authentication to not correctly log their RADIUS sessions
Fixed an issue that caused some switches in stack configurations to experience high CPU utilization in multicast scenarios that sometimes resulted in network instability
General known issues
MS130 and MS150 switches may not properly display IPv6 RA packets in dashboard packet captures
MS130 and MS150 switches may incorrectly remove or update SGT tags when no policy or VLAN mapping is defined. Until a firmware fix is available, correct SGT tags can be preserved by defining a policy for the SGT group in Adaptive Policies, and binding the SGT group to a VLAN using VLAN profiles.
In rare circumstances switches may experience uplink instability when IPv6 link-local addresses are enabled. If this issue is encountered it can be resolved by enabling IPv6 RA Guard to block ICMPv6 neighbor discovery messages.
Some switches may encounter an error, "incompatible configuration for attributes: allowed_vlans" when attempting to aggregate ports regardless of allowed VLANs configured in Dashboard
Ms120 known issues
Switches may fail to provide PoE power to legacy access points (always present)
Cable tests may report incorrect cable lengths
Ms150 known issues
Some SFP and QSFP modules may experience intermittent flapping on MS150 switches running MS18 firmware
MS150 switches in stack configurations may lose connectivity while reporting redundant uplinks as blocked. As a workaround, connectivity can be reestablished by disconnecting the impacted redundant uplink.
MS150 switches in stack configurations may incorrectly flood unknown multicast traffic despite the flood unknown multicast setting being disabled
48 port MS150 switches connected to an MX gateway may experience a reduction in uplink throughput if the uplink is on ports 45, 46, 47, or 48. As a workaround, connecting to the MX using ports outside of the 45-48 range will pass traffic at expected speeds.
Ms225 known issues
MS225 switches may infrequently stop forwarding client traffic until the switch is rebooted
Ms35x known issues
Switches may experience an unexpected reboot (present since MS 15)
Ms355 known issues
Switches in stack configuration may experience some ports failing to reconnect after a firmware upgrade
Ms410 known issues
Some MS410 switches may encounter alerts for fan failures that will eventually self-resolve
Ms425 known issues
In rare circumstances MS425 switches may encounter a software crash that results in a reboot
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