Zyxel_Chris  Zyxel Employee

@JackAninco, If the cable is longer than 3m then we recommend using active DAC or Active optical cable if it is short than 1m then use passive DAC.

@amercati, Please check your private message box, I have sent you the fixed firmware for this case. :)

@Eugene0x1 It's been a while, may I know if the issue still persists if so please private message me the tech support file as I required last time. :)

@Eugene0x1 I have use the Mikrotik routerboard 450G to try to reproduce this issue however, ipconfig/renew can work and also can get IP when the lease time is expired. Could you PM me your tech support file? I would like to check your configuration. In management> maintenance> tech support

@RonAllen May I know if the issue still persists after deactivate the trunk port? On the other hand, I would like to make sure if your PC's NIC is VLAN aware?

@Eugene0x1 In general, when the lease time remains at the half, for instance, the lease time is 10 minutes, the client will send DHCP request to renew the IP after 5 minute and DHCP server will answer the ack to the client. You have mentioned that "As soon as Lease time expires the MAC address is placed into the filtering…

@Zardoz, The sys LED blinking is because the device fail to finish the booting process. Could you please try to reset the switch to the factory default (by pressing the restore button). If still not work, then please contact reseller for RMA.

@LVRPA, Can you please follow up the below steps to reset, and feel free to let me know if have any questions. 1.) Enter "Ctrl+C", while booting. 2.) Enter "default" to reset to default. 3.) Enter "reset" to reboot and wait for config re-generation 4.) You can find the password and configuration have been reset.

@PeterUK Please activate match order to manual in classifier global setting then should run based on the weight.

@PeterUK Can you PM me your configuration file? I'd like to check on it. :)

@PeterUK, I assume you did not change the weight setting (which means are all equal, 32767 by default), if it is the case then the rule with the single classifier which has more criteria then has the higher priority. In this case, your rule 3's classifier has the most criteria and therefore has the highest priority, and…

@Lee201028, I assume you are using XGS1250-12, if it is the case then please connect to the port from 9 to 11. Please refer to the following datasheet page 2. XGS1250-12_2.pdf (zyxel.com) Please let me know if it's not the model you are asking for.

@panzerscope, Thanks for your feedback, since you have also raised the eITS ticket, and based on the log I can see that your transceiver is in the high operating temperature therefore it will trigger the "SFP detect" once it has been triggered then the fan speed will keep in the high RPM in order to cool down the…

@Lee201028, Could you let me know which model you use?

@Hoygen83, May I know if the issue still persists? Based on the logs, there is a topology change occurs, more likely there is a ring topology in the environment which may cause a loop if there is a misconfiguration. The easy way is to check the SW port LED in the front panel and see if a port is blinking fast. Or you may…