Nortel Networks 1000E warranty Automatic Switchback from Survival Mode

Page 464 of 488 Configuring MG 1000T survivability and alternate primary controller

Switchback from Survival Mode

A MG 1000T Expansion can switchback to Normal Mode after communication with the MG 1000T Core is restored. The following scenarios can trigger an MG 1000T in Survival Mode to return to Normal Mode:

•Automatic Switchback (AUTOSB) — enables an MG 1000T to automatically switchback from Survival Mode to Normal Mode as soon as the IP link with the primary controller is restored and the SWOTO timer has expired. A restart is initiated on the MG 1000T Expansion. At the end of the system start, the MG 1000T Expansion is ready to operate in Normal Mode.

•Manual Switchback — enables a technician to force the system into Normal Mode by issuing the SBFS command. This command returns the system to Normal Mode after the SOTS command has been used.

Automatic Switchback from Survival Mode

When the Automatic Switchback option is configured, a Survivable

MG 1000T Expansion automatically switches from Survival Mode to Normal Mode. It returns to Normal Mode as soon as the IP link with the primary controller is restored and the SWOTO timer expires.

A MG 1000T Expansion requires a valid database to be survivable.

The AUTOSB command is available in LD 117:

CHG AUTOSB <cab#> <Switchback setting>

Where:

cab# = 1-4, Media Gateway Switchback setting = (YES) NO

When the switchback parameter is set to YES, the MG 1000T Expansion automatically switches from Survival Mode when the SWOTO timer expires. If switchback is set to NO, the MG 1000T remains in Survival Mode until a technician enters the SBFS command.

553-3041-210 Standard 4.00 September 2007