Troubleshooting guide: Device cannot connect to the LMC after being offline for a long time

Description:

During the pairing process with the LMC, a certificate with a duration of two years is assigned to the device. The renewal is initiated six months before the certificate expires. If the device is not online and connected to the LMC for at least two hours within the six month timeframe, the certificate cannot be renewed. 

After the certificate has expired, the device cannot connect to the LMC anymore. In this case, the certificate has to be deleted manually on the device and the pairing process with the LMC has to be initiated again.

Tis article describes, how the LMC certificate can be deleted with the various LCOS variants.

Requirements:

• Any SSH client for accessing the devices via CLI (e.g. PuTTY)
• Any web browser for accessing the device via WEBconfig

Procedure:

LCOS:

CLI:

Connect to the device via the CLI and enter the following commands in succession:

• cd Setup/LMC
• do Delete-Certificate

WEBconfig:

1) In WEBconfig go to the menu (Extras →) LCOS Menu Tree → Setup → LMC → Delete-Certificate and click Execute.

2) The deletion process is acknowledged by a correspronding message. 

LCOS LX:

CLI:

Connect to the device via the CLI and enter the following commands in succession:

• cd Setup/LMC
• do Delete-Certificate

LCOS SX:

GS-23xx:

CLI:

Connect to the device via the CLI and enter the following commands in succession:

• lmc
• delete-certificate

WEBconfig:

In the webinterface go to the menu System → System Information → Information and, under LMC Configuration click on Delete Certificate.

GS-3xxx:

CLI:

Connect to the device via the CLI and enter the following command:

• LMC delete-certificate

WEBconfig:

In the webinterface go to the menau LMC → Configuration and click on Delete-Certificate.

GS-45xx und XS-Serie:

CLI:

Connect to the device via the CLI and enter the following commands in succession:

• Enable
• LMC Delete-Certificate