Alcatel-Lucent OmniSwitch 6450 User Manual page 98

Roles Within the Stack
In some pass-through conditions (for example, larger stacks where multiple switches are in pass-through
mode), it might be desirable to correct any duplicate saved slot assignments and then reboot the entire
stack. The recovery from pass-through can be accomplished with fewer steps than reassigning slot
numbers and rebooting modules on a slot-by-slot basis. However, be sure that there is no mission-critical
traffic being passed on the non-pass-though modules; traffic will be interrupted on these modules during
the reboot.
The following example shows a large stack with multiple elements operating in pass-through mode:
-> show stack topology
NI Role
----+-----------+--------+------+-------+-------+-------+-------+-------+-------
4 IDLE
5 IDLE
1001 PASS-THRU
2 SECONDARY
1003 PASS-THRU
1002 PASS-THRU
1 PRIMARY
3 IDLE
This disordered stack topology, with its three modules operating in pass-through mode, can be corrected
by entering the following commands:
-> stack set slot 4 saved-slot 1
-> stack set slot 5 saved-slot 2
-> stack set slot 1001 saved-slot 3
-> stack set slot 2 saved-slot 4
-> stack set slot 1003 saved-slot 5
-> stack set slot 1002 saved-slot 6
-> stack set slot 1 saved-slot 7
-> stack set slot 3 saved-slot 8
-> reload all
When all elements in the stack come up following the reboot, there are no longer any duplicate slot
numbers in the stack. In addition, the stack topology is more orderly and, as a result, easier to manage:
-> show stack topology
NI Role
----+-----------+--------+------+-------+-------+-------+-------+-------+-------
1 PRIMARY
2 SECONDARY
3 IDLE
4 IDLE
5 IDLE
6 IDLE
7 IDLE
8 IDLE
page 6-16
State Saved Link A
Slot State
RUNNING 4 UP
RUNNING 5 UP
DUP-SLOT 2 UP
RUNNING 2 UP
DUP-SLOT 2 UP
DUP-SLOT 2 UP
RUNNING 1 UP
RUNNING 3 UP
State Saved Link A
Slot State
RUNNING 1 UP
RUNNING 2 UP
RUNNING 3 UP
RUNNING 4 UP
RUNNING 5 UP
RUNNING 6 UP
RUNNING 7 UP
RUNNING 8 UP
Managing OmniSwitch 6450 Stacks
Link A Link A
Remote Remote Link B
NI Port State
5 StackB UP
1001 StackB UP
2 StackB UP
1003 StackB UP
1002 StackB UP
1 StackB UP
3 StackB UP
4 StackB UP
Link A Link A
Remote Remote Link B
NI Port State
2 StackB UP
3 StackB UP
4 StackB UP
5 StackB UP
6 StackB UP
7 StackB UP
8 StackB UP
1 StackB UP
OmniSwitch 6450 Hardware Users Guide
Link B Link B
Remote Remote
NI Port
3 StackA
4 StackA
5 StackA
1001 StackA
2 StackA
1003 StackA
1002 StackA
1 StackA
Link B Link B
Remote Remote
NI Port
8 StackA
1 StackA
2 StackA
3 StackA
4 StackA
5 StackA
6 StackA
7 StackA
July 2012