NebulaFlex Switch GS1920 Series - V4.80 Patch 1 Firmware Release

Zyxel_Melen · July 30

Zyxel Switch GS1920 Series Release Note

July 2024

Firmware Version on all models

(Click Hyperlink to download the firmware directly)

Zyxel GS1920-8HPv2 - V4.80(ABKZ.1)C0

Zyxel GS1920-24v2 - V4.80(ABMH.1)C0

Zyxel GS1920-24HPv2 - V4.80(ABMI.1)C0

Zyxel GS1920-48v2 - V4.80(ABMJ.1)C0

Zyxel GS1920-48HPv2 - V4.80(ABMK.1)C0

New Feature and Enhancements

1. [Nebula] Enhance the cloud auto recovery mechanism to prevent the device from being locked when the connection is unstable.

2. [Standalone] Enhance security by forcing users to change the password after first login.

3. [Standalone] Support Zyxel Private MIB - Hardware Monitor - Power Ethernet - Transceiver

4. [Standalone][Nebula] Enhance security by supporting the ECDSA algorithm in SSH.

5. [Standalone][Nebula] Expand NTP servers from 1 to 3

Bug Fix

C=Cloud mode, S=Standalone mode

Bug fix	C	S
1. [Vulnerability] Fixed crash issue when receive an unexpected HTTPs request content.	V	V
2. Fixed switch crash issue caused by receiving LLDP packets with over chassis ID lengths.	V	V
3. [eITS#230400140] Fixed switch crashed issues that is caused by Nessus version 10.5.1 to scan SSH.	V	V
4. [eITS#230700521] Fixed crash issue which receiving an unexpected format DHCP packet when device enable DHCP snooping.	V	V
5. [eITS#230801140] Fixed the crash when enable IPv6 and receiving an IPv6 NA packet.	-	V
6. [eITS#231201249] Fixed switch may reboot automatically when receiving IPv6 packets.	-	V
7. [eITS#221201201] Getting logging information that contains special characters causes switch hang.	V	V
8. [eITS#240500205] Switch hang when click PD "Reset" via Neighbor page	-	V
9. [eITS#230301533] Fixed reading mib zyxelIpsgInfoTable fail.	V	V
10. [eITS#230301330] Fixed failing to import certificate while the file size is over 5k	-	V
11. [eITS#230400154] Fixed failing to delete inactive classifiers even though they are not bound to any policies.	-	V
12. [eITS#230500677] Fixed timer unexpected goes slowly after lots of STP topology change occur.	V	V
13. [eITS#230500705][eITS#230901020] Switch sometime disconnect with NCC when DNS Bug fix Nebula Standalone requery find server IP has changed.	V	-
14. [Forum] Fix incorrect swif0 interface counter in standard IfEntry MIB.	V	V
15. [eITS#230901020] Switch sometime disconnect with NCC when DNS requery find server IP has changed.	V	-
16. [eITS#231001888] Fixed fail to add policy rule issue when binding the second classifier containing the same socket range as the first one.	-	V
17. [eITS#240200888] The switch crashes due to field length limitation when the index button at IPv6 table is clicked.	-	V
18. [eITS#230801482] Fixed an issue causing the switch to repeatedly switch from standalone mode to cloud mode leading to switch offline.	V	-
19. [eITS#240301159] IPv6 traffic drop or has high latency due to ACL trap the traffic.	V	V
20. [eITS#240201138] Fixed an error caused by changing VLAN port settings after adjusting Voice VLAN ID.	-	V
21. [eITS#240301821] Restore wrong type of configuration without displaying an error message	-	V

Please refer to the Download Link for more details.

StouAdmin · July 30

thanks for sharing. it's also working for GS1920-24HP but without the V2 which I don't have.
was that intended ?

Zyxel_Melen · July 30

Hi @StouAdmin,

GS1920-24HP cannot upgrade with this firmware. In addition, GS1920-24HP has been eol for a while.

StouAdmin · August 1

Hi @Zyxel_Melen
The fact that the GS1920-24HP is eol - I know, but the fact that the question was:

— it's ALSO working for GS1920-24HP but without the V2 which I don't have. —

was that intended ? NO you may answer, but it does :-)

Upgraded 2 switches with no issues at all.

Just so you know it.

Zyxel_Melen · August 5

Hi @StouAdmin,

I think your GS1920-24HP is the V2 model. I have tested a local test and find the V1 model cannot use this firmware to upgrade.

Additionally, only the V2 model has the reset and restore button in the front panel.

StouAdmin · August 5

You are absolutely right. It IS a v2, but I'm surprised it's not visible anywhere on the device, so I had to look up the old invoice, and sure enough, it says V2.

My mistake for claiming otherwise, but errors happen for humans.
Thanks for support.