Nortel Networks 2500 Series manual Auto Unit Replacement

54Nortel Ethernet Routing Switch 2500 Series stacking

Ensure that the new switch is set to factory default values. Then, if the unit is a standalone ERS 2500 switch, ensure that a valid stacking license.dat file is installed on the switch and the rear ports are operating in Stacking Mode. If the unit is a Stack Enabled ERS 2500 switch, then the unit is ready for adding or replacing. For information on installing a stacking license, see "Standalone configuration with license files" (page 40).

3Download the configuration file to the new unit.

Manually insert the new unit in the stack. Turn off the new unit inserted into the stack and manually replace the failed unit in the stack. Plug in the stack cables into the appropriate cascade ports.

4Power up the new unit in the stack.

The new unit joins the stack and the configuration of the failed unit is replicated onto it. Once the replication is completed, the new unit is reset and rejoins the stack automatically.

—End—

If the base unit is being replaced, remember that the stack elected a temporary base unit. The new unit cannot automatically resume operation as the base unit even with the Unit Select switch set to Base. To restore the stack to its original running state with the new unit set to Base using the Unit Select switch, the switch stack must be reset.

Auto Unit Replacement

The Auto Unit Replacement (AUR) feature enables users to replace a unit from a stack while retaining the configuration of the unit. This feature requires the stack power to be on during the unit replacement.

The main feature of the AUR is the ability to retain the configuration (CFG) image of a unit in a stack during a unit replacement. The retained CFG image from the old unit is restored to the new unit. Because retained CFG images are kept in the DRAM of the stack, the stack power must be kept on during the procedure.

ATTENTION

In order for AUR to function properly, the new unit and the existing units in the stack must all be running the same version of software (Release 4.1 software or later).

Nortel Ethernet Routing Switch 2500 Series

Overview — System Configuration

NN47215-500 (323162-B) 02.02 Standard

4.1 19 November 2007

Copyright © 2007, Nortel Networks