Release Date:
April 29, 2026

This firmware supports the GSM4230P, GSM4230PX, GSM4230UP, GSM4248P, GSM4248PX, and GSM4248UX models.

Enhancements:

The AV UI provides the following enhancements:

• Support for new AJA AV Network profile.
• Support for new Audio Video AVB MILAN profile.
• Support for new Audio Video AVB MILAN with Dante PTPv1 PTPv2 or AES67 profile.
• Support for new AUDAC Audio and Control Network profile.
• Support for new BluOS AV profile.
• Support for Color Palettes to the profile color picker.
• Update Nice Home Management profile with auto provision features.

Bug Fixes:

• Fixes the issue where only five Auto-LAGs were created even when more than five devices were connected using multiple links per device. [MS-5200]
• Fixes the issue where continuous DHCPv6 packets cause switches to reboot unexpectedly. [CE-7265]
• Fixes the issue where the switch operates as dot1AS Grand Master sent Announce messages with a UTC Offset value of 0. [MS-5416]
• Fixes the issue where OUI-based VLAN assignments stopped functioning after extended operation. [CE-7316]
• Fixes the issue where the VLAN 1 routing interface could not be removed through the Main UI. [CE-7321]
• Fixed the issue where creating a Tagged VLAN Port in an AVB VLAN Profile incorrectly changes the MTU to 9198. [CE-7632]
• Fixes the issue where PTP TC is not enabled on a manual LAG interface when using Manual Trunk. [CE-7608]
• Fixes the issue where the Audio Dante profile auto-trunk port retains “no spanning tree port mode” configuration after connecting. [PV-6886]
• Fixes the issue where AVUI rejects subnet mask 255.255.255.254 with an incorrect subnet error. [CE-7650]
• Fixes the issue where PVST is disabled on a VLAN after deleting and re-creating a DICENTIS Conference System profile on that VLAN. [CE-7469]
• Fixes the issue where Voice VLAN configuration on a port was unexpectedly disabled after re-enabling Insight management. [CE-7582]
• Fixes the issue where VLAN 1 membership unexpectedly changed to tagged after activating Insight management. [CE-7601]

AV UI Known Issues:

• gPTP Clock Master Causes Time Drift with AVB MILAN Devices:
  If the switch becomes the gPTP clock master, time drift issues may occur when AVB MILAN devices are in use.
  Workaround: When creating an "Audio Video AVB MILAN" profile in AVUI, set the Local Clock Priority 1 and Priority 2 values to 255 to prevent the switch from acting as the clock master.
• Stale Spanning Tree Configuration After Firmware Upgrade from AVUI 2.2.13.29:
  When upgrading firmware from AVUI 2.2.13.29 to the current release, access port configurations with no spanning-tree port mode may persist. If Dante devices are connected using redundancy ports, this can cause a network loop.
  Workaround: Manually clear the stale configuration by setting the affected interfaces back to spanning-tree port mode.
• Kramer AV Single-VLAN Profile Cannot Be Modified When Using VLAN 1:
  If a Kramer AV profile is created with a single VLAN and that VLAN is VLAN 1, the profile cannot be modified to another single-VLAN profile.
  Workaround: Use a VLAN ID other than VLAN 1 when creating a single-VLAN Kramer AV profile.

Firmware Known Issues:

• This firmware includes a configuration migration process that transitions default web browser protocol from HTTP to HTTPS. When you upgrade to this firmware and import an older configuration with HTTPS disabled, HTTPS becomes enabled.
  Workaround: Reconfigure the web browser protocol settings manually after you perform a firmware upgrade or import an older configuration
• During your initial log in, you must set up a password to access the switch. However, if you access the main UI before you set up a password and simultaneously set the password in the AV UI, the switch console might lock for up to 15 minutes.
  Workaround: Complete the password setup in only one GUI interface to avoid this lock up issue.
• If you upload only the private key or the certificate before you enable HTTPS, the system enables the HTTPS service but it fails to operate correctly because the configuration is incomplete. A factory reset does not fix this issue.
  Workaround: Ensure both the private key and certificate are fully uploaded before you enable HTTPS. If the issue still occurs, remove the incomplete HTTPS-related private key or certificate, and disable HTTPS before reconfiguring.

Warnings:

Read and follow these warnings before updating your firmware:

• SNTP is deprecated from firmware version 13.0.5.10 onwards and NTP is introduced. Configure an NTP server in your network. Remove SNTP related settings from the configuration file on firmware version 13.0.4.x before you apply it to the switch running firmware version 13.0.5.x.
• HTTPS is set to default web browser protocol from firmware version 13.0.5.20 and newer versions. The default certificate is self-signed, so you may encounter a browser warning when logging in. To avoid this warning, you can download your own certificate issued by a trusted Certificate Authority (CA).  

General Information:

• The boot code remains at the existing version 1.0.0.13 in this switch firmware.
• The process of upgrading the firmware and boot code takes about three minutes. Apply the “update bootcode” command from the command line interface. Do not switch off or restart the device during the upgrade process.
• The switch firmware upgrades AppMgr to version 1.0.6.16.
• Insight and Engage/AV UI are mutually exclusive. This means you can only use one of these options to configure and manage the switch, not both.
• If the encrypted password in the configuration file does not adhere to the NETGEAR password policy, when the configuration file is loaded on the firmware version 13.0.5.16 or later, you must create a new password during the initial login.

Download Link: https://www.downloads.netgear.com/files/GDC/M4250W2/GSM4230xx_GSM4248xx_V13.0.5.26.zip

Firmware Checksum Details

File Name: M4250H-v13.0.5.26.stk

MD5: 941C1F5AAC814E8679FC8C97E7242270

SHA-256: 6b4b97f800316a310a7651bab44930e4c6f3924862117417ac746a24b9d19da9

Firmware Update Instructions:

To update your product’s firmware, follow the instructions in your product’s user manual. To find your user manual, visit https://www.netgear.com/support/, enter your model number in the search box, and click the Documentation button on the product page.