ZyXEL Communications GS1920-48HP Owner's manual

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Zyxel GS1920 series V4.50(AAxx.2)C0
Release Note/Manual Supplement
Date: Feb. 27, 2018
This document describes the features in the GS1920 series product for its
V4.50(AAxx.2)C0 release.
Support Models:
Zyxel GS1920-48HP
Zyxel GS1920-48
Zyxel GS1920-24HP
Zyxel GS1920-24
Version:
Model
Firmware Version
Boot Version
Zyxel GS1920-48HP
V4.50(AAOA.2) | 02/27/2018
V1.00 | 11/15/2013
Zyxel GS1920-48
V4.50(AANZ.2) | 02/27/2018
V1.00 | 11/15/2013
Zyxel GS1920-24HP
V4.50(AAOC.2) | 02/27/2018
V1.00 | 03/21/2014
Zyxel GS1920-24
V4.50(AAOB.2) | 02/27/2018
V1.00 | 03/21/2014

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Enhanced Features:
V4.50(AAxx.2)C0:
1. NTP Server supports DNS format
2. Enhanced dual image resilience
3. SHA2
4. Show IPv6 socket
5. Logout all current user access after changing the device management IP
6. Display port utilization
7. Use [Ctrl+C] to escape when executing “show running config, show log”
8. Time sync (NTP) over IPv6
9. Syslog setup for IPv6 and UDP port
10. ZDP v1.8.3
11. Time stamp for save configuration
12. POE default mode change to consumption mode, and the default config will
show consumption mode setting.(POE model only)
13. Web login warning page
14. Smart fan (designed to automatically adjust speed based on device
temperature)
15. Custom Default configuration
16. Enhanced GUI with new Zyxel logo
17. Avoid multicast group cannot be added while mac collision happens
Bug Fix:
V4.50(AAxx.2)C0:
1. eITS#151200455/ 170200710
[LLDP] particular Cisco IP phone may release IP (DHCP mode) after every 180
seconds.
2. eITS#151201303
[SNMP] SNMP GETBULK produces incorrect results when max-repetition is set
greater than 55.
3. eITS#160101255
[LACP] Fail to disable LACP if disable trunk first.

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4. eITS#160300698
[VLAN] Partial configuration loss occurs after configuring private VLAN via web GUI
and rebooting switch.
5. eITS#160500852
[MGMT] GS1920-24HP can upload successfully GS2210’s firmware, which will cause
GS1920-24HP crash and never boot up properly after rebooting.
6. eITS#160700103
[Log] Displayed port speed value is always 0 KB/s for both TX and RX.
7. eITS#161100122
[MGMT] Switch does not check the password with illegal characters.
8. eITS#170100698
[RSTP] The switch cannot auto adjust RSTP path cost according to the port speed.
9. eITS#170300312
[MGMT] Change from DHCP to static IP and management VLAN in the same time
will lose the static IP setting after DHCP lease time.
10. eITS#170300428
[PING] Switch has high ping latency periodically due to the routine runtime task.
11. eITS#170500473
[MGMT] Prevent unexpected reboot caused by Avast antivirus software.
12. eITS#170500863
[SYSTEM] Switch may encounter unexpectedly reboot under a large IP network
environment.
13. eITS#170700931
[ACL] The permitted traffic will be denied when users set more than 64 classifiers.
14. eITS#171200272
[IPSG/Port Security] Client traffic is unexpectedly discarded after MAC address
aging time when IPSG and port security are enabled.
15. eITS# 180100999
[Maintenance] Switch may miss configuration if upgrades to new firmware.
16. eITS#180200048
[WEB] Web GUI may display Syntax error when restoring configuration.

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Known Issue:
1. [Bandwidth Control] Ingress rate limit of TCP traffic might have inaccuracy with
some criteria.
2. [Security] Fake IP traffic cannot be filtered when a static IP binding existed.
3. [DIAG] The cable length resolution of Cable Diagnostic is about +-15 meter.
4. [DIAG] The fault distance of Cable Diagnostic is less than 1 meter without cable
inserted.
5. [MGMT] GS1920 is cluster manager and the cluster member won’t upgrade
firmware via FTP if firmware size is over than 4.8MB.
Limitation of Settings:
1. 802.1Q Static VLANs 1K
2. Static MAC forwarding entry 256
3. MAC filtering entry 256
4. Cluster member 24
5. Protocol based VLAN entries per port 7
6. Port-security max address-limit number 16K
7. Syslog server entry 4
8. IP source guard entry 512
9. IP subnet based VLAN entry 16
10. DHCP snooping binding table 16K
11. Multicast group 1024
12. ACL 256
13. DHCP Entry 16
14. Trunk groups 14(24 ports)/ 16(48 ports)
15. Per trunk group port number 8
16. MSTP instance 0-15
17. MAC-based VLAN 28(24 ports)/ 50(48 ports)
18. Voice VLAN OUI entry 6
19. ZON neighbor per-port maximum clients 10

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Change History:
V4.50(AAxx.2) | 02/27/2018
V4.30(AAxx.0) | 09/16/2015
V4.10(AAxx.0) | 12/25/2013
Firmware Upgrade:
The GS1920 series use FTP to upgrade firmware in run-time through its built-in FTP server.
You can use any FTP client (for example, ftp.exe in Windows) to upgrade GS1920 series.
The upgrade procedure is as follows:
C:\> ftp <GS1920 series IP address>
User : admin
Password: 1234
230 Logged in
ftp> put 450AAxx1C0.bin ras-0
ftp> bye
Where
User name: the management user name, admin by default.
Password: the management password, 1234 by default.
450AAxx1C0.bin: the name of firmware file you want to upgrade.
ras-0: the internal firmware name in GS1920 series (store at first flash).
ras-1: the internal firmware name in GS1920 series (store at second flash).

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Reset switch to factory-default setting:
When users forget the login profile or password, they're unable to login the switch
again. The only way to login to the switch is to reset the switch to factory-default and
use the default user name (admin) and password (1234) to login.
Procedure to reset switch to factory-default login profile:
1. Make sure the SYS LED is steady green (not blinking). Use a pointed instrument
such as a pin to access the Reset button on the side of Switch as shown below.
Side Panel: GS1920-48
Side Panel: GS1920-24, GS1920-24HP, GS1920-48HP
2. Press the button for more than five seconds until SYS LED begins to blink and
then release it. Wait for the Switch to restart (the SYS LED will be steady green
again). This takes up to two minutes.
Note: If you want to access the Switch web configuration again, you may
change your IP address of your computer to be in the same subnet as that of
the default Switch IP address (192.168.1.1).
3. User can now login with default user-name and password.