NebulaFlex Switch GS1350 Series - V4.90 Patch 3 Firmware Release

Zyxel_Melen

Zyxel Switch GS1350 Series Release Note 

November 2025

Firmware Version on all models

(Click Hyperlink to download the firmware directly)

Zyxel GS1350-6HP - V4.90(ABPI.3)C0

Zyxel GS1350-12HP - V4.90(ABPJ.3)C0

Zyxel GS1350-18HP - V4.90(ABPK.3)C0

Zyxel GS1350-26HP - V4.90(ABPL.3)C0

New Feature and Enhancements

1. [Nebula 19.10] Support Port advisor. 

2. [Nebula 19.20] VLAN ingress check enabled by default.

Bug Fix

C=Cloud mode, S=Standalone mode

Bug fix	C	S
1. [eITS #241200595] Fixed high CPU usage triggered by client switching between trunk interfaces.	V	V
2. [eITS #250200357] Switch has dropped the EAPoL unicast packet.	V	V
3. [eITS #250200815, 250400367] After deleting original and creating another mgmt VLAN and IP, pinging the new mgmt IP over LACP links will fail if one of the LACP member ports is inactive.	V	V
4. [eITS #250302409] Fixed the device sometimes fail to connect with Nebula server.	V	-
5. [eITS #250400091] Fixed that truncated DNS packets cannot be processed causing DNS parsing failed.	V	V
6. [eITS #250500429] Fixed crash when receiving IPv6 tunnel packet.	V	V
7. [eITS #250601084] Fixed hang when using CLI to show tech-support.	V	V
8. [eITS #250800443] Special characters in the port name cause the port information to appear blank on the Dashboard.	V	V
9. [eITS #250900428] The date format in the backup configuration file name becomes incorrect when Daylight Saving Time is enabled.	V	V

Please refer to the Download Link for more details.