Official Release Notes

You can find official release notes from Ubiquiti here:

• [FIRMWARE] 3.9.27.8537 for UAP/USW has been released.
• [FIRMWARE] 3.9.24.8264 for UAP has been released.
• [FIRMWARE] 3.9.21.8191 for UAP/USW has been released.
• [FIRMWARE] 3.9.19.8123 for UAP/USW has been released.
• [FIRMWARE] 3.9.18.8086 for UAP/USW has been released.
• [FIRMWARE] 3.9.15.8011 for UAP/USW has been released.

HD/SHD/XG

• 3.9.24-3.9.27.8537
  • Fixed an issue with the reported uplink interface after RF scan when bonding was enabled.
  • Fixed 802.1X VLAN reporting when RADIUS VLAN was enabled.
  • Increased NTP client update frequency.
  • Improved client STA performance for SSIDs with DVLAN enabled.
  • Removed unnecessary logging.
  • SHD/XG Only
    • Fixed a performance issue.
  • XG Only
    • Re-enabled autonegotiation on the 10 GbE PHY.
•  3.9.21-3.9.24.8264
  • Improved device stability when using rate control.
  • Fixed channel utilization stats.
  • Fixed spectral scanning support.
  • Fixed forwarding of fragmented IPv6 packets.
  • SHD/XG Only
    • Made improvements to airTime.
• 3.9.19-3.9.21.8191
  • Fixed the speed regression introduced in 3.9.18.
  • Made an improvement to stability.
  • XG Only
    • 10Gbps Ethernet performance Improvements.
• 3.9.18-3.9.19.8123
  • Fixed a memory leak when multicast enhancements were enabled.
• 3.9.15-3.9.18.8086
  • Made improvements to stability and performance.
• 3.9.3/3.9.6-3.9.15.8011
  • XG Only
    • Fixed airView and airTime support.
  • USXG Only
    • Improved LAG config handling.

nanoHD

• 3.9.24-3.9.27.8537
  • Added:
    • Channel utilization counters.
    • DTIM Support.
    • Initial Bandsteering support.
    • athstats tool.
    • Broadcast filtering support.
  • Enabled DFS support.
  • Fixed:
    • broadcast filter configuration.
    • hidden SSID support.
    • crash triggered by provisioning.
    • bug causing SNMP hostname to disappear after provision and reboot.
    • PMF support.
•  3.9.21-3.9.24.8264
  • Added channel utilization support (currently 5GHz only).
  • Enabled VHT160 support.
  • Added nslookup.
  • Enabled MU-MIMO.
  • Fixed per-STA rate limiting support (user groups).
  • Stopped broadcasting default SSID.
  • Added MAC ACL support.
  • Fixed RADIUS VLAN support.
  • Fixed fast-apply support.
  • Fixed HT40 support on 2.4GHz.
  • Made improvements to stability.
•  3.9.19-3.9.21.8191
  • Merged 3rd release firmware.
  • Added RADIUS VLAN support.
  • Added fast-apply support.
  • Added 802.11w support (PMF).
  • Added 802.11X identity support.
  • Disabled country code IE.
  • Made improvements to stability.
• 3.9.18-3.9.19.8123
  • Fixed MBSS support.
  • Made improvements to stability.
• 3.9.15-3.9.18.8086
  • Added guest control support.
  • Added 802.1X support.
  • Added support for multiple BSSIDs per radio.
  • Fixed issue when using a bracket in the ESSID or PSK.
  • Fixed auto channel selection issue.
  • Fixed 802.11n negotiation issue.
  • Fixed issue which could cause Ethernet to stay down after provision or reboot.
• 3.9.3/3.9.6-3.9.15.8011
  • Added stainfo support.

UAP

• 3.9.24-3.9.27.8537
  • Disabled over the DS fast BSS transition.
  • Fixed management VLANs on downlink UAPs.
  • Fixed a bug which sometimes caused 100% CPU usage when fast BSS transition was enabled.
  • Made various wireless uplink changes, including adding multi-radio uplink support.
  • Now track MAC filter rejections.
  • UAPG3 Only
    • Fixed remaining crash when 802.11r is enabled.
    • Reverted a patch which disabled the secondary ethernet when using wireless uplinks.
  • UAPG2/G3 Only
    • Improved channel utilization reporting accuracy.
  • UAPG2
    • Made improvements to performance.
  • UAP-Pro Only
    • Removed bandsteering as it isn’t supported.
•  3.9.21-3.9.24.8264
  • Refactored and improved fast-apply, which also fixed two small memory leaks.
•  3.9.19-3.9.21.8191
  • Fixed a memory leak related to the redirector.
  • UAPG2/G3 Only
    • Now tracks TX airtime latency.
  • UAPG1 Only
    • Fixed device firmware upgrade.
• 3.9.18-3.9.19.8123
  • Fixed NAS-IP-Address attribute so that it always returns the management IP of the AP.
• 3.9.15-3.9.18.8086
  • Improved STA signal reporting
  • Made improvements to wireless uplink/mesh V3.
  • Fixed a bug with rate control when using multiple SSIDs.
• 3.9.3/3.9.6-3.9.15.8011
  • Fixed a small memory leak.
  • Fixed outdoor flag.
  • Added fast-apply for guest portal.
  • Improved guest portal redirector handling.
  • Fixed a bug with L3 wireless adoption.
  • Fixed bandsteering.
  • Fixed issue with bridge priority so the secondary ethernet port remains enabled.
  • Improved DFS.
  • Fixed an issue preventing bandsteering from being enabled.
  • Fixed an issue with the downlink monitor.
  • Added uplink priority for the bridge interfaces.
  • Added KRACK AP mode patches for 802.11r.
  • UAPG3 Only
    • Fixed minimum rates.
    • Further improvements to device upgrade and boot times.
    • Fixed a crash in hostapd when Fast Roaming is enabled.
    • Added support for 82.11r and 802.11k.
    • Fixed channel utilization reports.
    • Improvement bootup and TFP recovery times.
  • UAPG2/G3 Only
    • Added RADIUS VLAN support to MAC authentication bypass.
    • Fixed a bug which prevented APs from uprgading when bandsteering was neabled.
    • Fxied issue with 3.9.3.7537 which caused some APs to not accept any clients.
  • UAPG2 Only
    • Added support for 802.11k.
  • UAPG1/G2
    • Added net-snmp.

HW

• 3.9.24-3.9.27.8537
  • Made L3 adoption and management improvements.
•  3.9.21-3.9.24.8264
  • Added device hostname in shell.
  • Optimized image size.
•  3.9.19-3.9.21.8191
  • Enabled TCP Packetization-Layer Path MTU Discovery when an ICMP black hole is detected.
  • Improved CPU utilization of SNMP.
• 3.9.18-3.9.19.8123
  • Fixed some issues which would cause L3 adopted devices to show up as disconnected in the controller.
  • Fixed SNMP sysName.
• 3.9.15-3.9.18.8086
  • New protocol implementation.
  • Added controller support for netconsole.
• 3.9.3-3.9.15.8011
  • Improved security.
  • Updated openssl package to 1.0.2m.
  • Updated curl to 7.57.0.
  • Added IPv6 management support.
  • Improved event notification on device upgrade.

USW

• 3.9.21-3.9.27.8537
  • Fixed crash caused by autodetect.
  • Adjusted MAB priority, no longer waiting for 802.1X timeout to process.
  • Fixed port mirroring provisioning.
  • Added switch PoE port overload and disconnect reporting.
•  3.9.19-3.9.21.8191
  • Enhanced DHCP snooping trace log for LAGs
• 3.9.15-3.9.18.8086
  • Made various improvements.
• 3.9.3/3.9.6-3.9.15.8011
  • Added port ID in STP error message.
  • Lowered STP topology change log level.
  • Improved DHCP guarding and snooping.
  • Added DHCP snooping debug command.

USL2

• 3.9.3/3.9.6-3.9.15.8011
  • Improved PSU status reporting.

AC-IW/IW-Pro/EDU/M-Pro

• 3.9.3/3.9.6-3.9.15.8011
  • Fixed VLAN pass-through regression
  • Added port disable support.
  • AC-IW/IW-Pro Only
    • Improved VLAN config and prevented traffic leaks.
    • Fixed RADIUS VLAN when port VLAN is enabled.
    • Added QoS CIR/EIR support.
    • Made improvements to performance.
    • Fixed management VLAN issue causing decreased multicast performance.
  • EDU only
    • Fixed issue with volume not applying.
    • Improved baresip config script.