Nortel Networks 2500 Series manual CFG mirror images in the stack after adding unit

Auto Unit Replacement 57

Adding a unit In a stack that does not have any INACTIVE CFG mirror images, adding a new unit causes the CFG image of the new unit to be mirrored in the stack. For example, in Figure 16 "CFG mirror images in the stack after adding unit 4" (page 57), after adding unit 4 to the stack, the CFG 4 mirror image is created in the BU (unit 1).

Figure 16

CFG mirror images in the stack after adding unit 4

Removing an NBU When an NBU is removed from a stack, the related CFG mirror image in the stack becomes INACTIVE.

The AUR feature ensures that the stack always has two copies of an INACTIVE CFG mirror image. These two copies must not reside in the same unit in the stack.

For example, after the removal of unit 4 from the stack shown in Figure 16 "CFG mirror images in the stack after adding unit 4" (page 57), the CFG 4 mirror image becomes INACTIVE (see Figure 17 "CFG mirror images after removing unit 4" (page 58)). Another copy of the INACTIVE CFG 4 mirror image is also created in unit 2.

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