GS1350-18HP, does not accept DHCP Offer from Meraki Firewall

Moritz_M · January 17

Hello there,

we tried to install a GS1350-18HP in our network.

When Sniffing the traffic we see a DHCP request coming from said switch. We also see the DHCP reply from the firewall being sent to the Switch.

But no reservation takes place. The switch does not respond to the offer.

Connected Accesspoints have no problem receiving their IP and connection to the nebula cloud.

We tried to connect via console to the switch. The following settings were used:

Terminal Type: VT100

baud rate: 9600

Data bits: 8

Stop bits: 1

Parity: none

Flow control: none

unfortunately the output is only garbage:

WhatsApp Image 2024-01-17 at 12.27.22.jpeg

Any idea on how to proceed? I planned on giving the device a static IP followed by a software update. But no console and no IP means now software update.

PeterUK · January 17

Try connecting to the switch at 192.168.1.1

Moritz_M · January 17

https://community.zyxel.com/en/discussion/comment/60985#Comment_60985

Unfortunately the switch does not respond to ping on ip 192.168.1.1.

we connected the laptop directly to the switch on Port 18 and configured the LAN interface on the Laptop with 192.168.1.5. No response whatsoever.

Any suggestions on the Console connection?

PeterUK · January 17

It should work on that IP when DHCP fails can you reset and connect only one device to it to get to 192.168.1.1

for console

VT100 terminal emulation
115200 bps
No parity, 8 data bits, 1 stop bit
No flow control

Zyxel_Kay · January 18

Hi @Moritz_M

To further analyze and troubleshoot the issue you are experiencing with the GS1350-18HP, please follow the steps below:

1. Connect to the console using the following settings, as suggested by @PeterUK:

Setting	Default Value
Terminal Emulation	VT100
Baud Rate	115200 bps
Parity	None
Number of Data Bits	8
Number of Stop Bits	1
Flow Control	None

2. Once connected, please log in and enter the following command to retrieve tech support information:

sysname# show tech-support

3. Save the tech-support log and send us through private msg.

Moritz_M · January 18

https://community.zyxel.com/en/discussion/comment/61020#Comment_61020

Hi Kay,

I was able to connect to the switch via console. But the switch does not accept the default password. I tried again after pressing the reset button for 10 seconds. But the switch doesn't seem to accept the default password. There is no cloud connection, but I still tried the password configured in nebula, but that also didn't work.

any idea how I can solve this?

Zyxel_Kay · January 19

Hi @Moritz_M

If you wish to restore the GS1350-18HP to factory defaults, please follow these steps:

Press and hold the RESTORE button on the switch for more than 7 seconds.
The switch will reboot, and you will notice the PWR LED turning amber during this process.
After the restoration is complete, you should be able to access the switch using the default username and password: admin/1234.

Please try this method, and let me know if you encounter any issues or if you have any further questions.

GS1350-18HP, does not accept DHCP Offer from Meraki Firewall

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