Zyxel_Chris  Zyxel Employee

@malakudi, Since your device is on Nebula and there is the CRC warning, I can help to check if there is further information, please activate the "invite Zyxel support" in Help> Center and private message me your org./site name and the timestamp.

@malakudi, Can you please auto-negotiate the link on the 2.5G connection and then collect the tech-support (in management> maintenance) file when the symptom occurs then send it to me via private message? Additionally, could you please provide the vendor name of the cat6 cable also may I know if you can put the cable from…

@nail_adler Thanks for your information, if there is no issue in the past 5 years (with same scenario) and no firmware upgrade on Tvobx or the GS-105B also because there is no detailed log that can refer to in the unmanaged switch, so it could be the hardware related problem, you might consider for the repleacement.

So, either 192.168.167.254/32 or 192.168.167.254/24, both of setting will lead the tunnel disconnect? Could you please wait for 5 minutes to let the NCC refresh the information?

@nail_adler, You have mentioned that this scenario can works without any issues for the past 5 years and there is no log we can refer on this unmanaged switch, I'd like to confirm if the TVbox had to upgrade the firmware recently?

@Peppino, For your first question that column is the address in real life, and please try 192.168.167.254/24 :)

@Peppino, Please be aware that the peer site IP (private subnet) should be reachable, 192.168.167.0/24 is the subnet name, not the actual IP, please use the peer site LAN interface IP instead.

@Peppino, Could you please activate Invite Zyxel support in Neubla, Help center> Support request, in order to check your device connection status, also please provide me your org./site name, you can either leave the information here or private message me. :)

Hello @Peppino, Please help to confirm if your private subnet IP is reachable.

@Chris78, The connection quality might also affect if there is a lot of re-transmission and could also not finish in 40 seconds. The reason why cannot leave the upgrade page is that the switch is doing the upgrade while uploading the firmware, if it doesn't finish in time then it might break the boot image and cause the…

@redge, I will private message you the datecode of link aggregation the SFP port (XGS1210-12), and sorry we currently do not have the plan to put XGS1250 on Nebula due to the production position.

@MrLarsen, In order to verify this issue, can you please activate "Invite Zyxel support" in Nebula, Help Center>Support request and private me the org./site name, thanks. :)

@Chris78, Have checked on this and it should be the firmware upload did not finish in 40 seconds, therefore the device will stay on the upload page until the next time uploads successfully, this is to prevent any abnormal event during the upgrade and cause the device boot up failed. Because our firmware size is around 6xx…

@MrLarsen, May I know if you have set the corresponding routing policy for each subnet?