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
.
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