Managing OmniSwitch 6850/6850E Series Stacks
Roles Within the Stack
OmniSwitch 6850/6850E Series Hardware Users Guide
June 2011
page 6-17
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
Link A Link A Link B Link B
NI Role State Saved Link A Remote Remote Link B Remote Remote
Slot State NI Port State NI Port
----+-----------+--------+------+-------+-------+-------+-------+-------+-------
4 IDLE RUNNING 4 UP 5 StackB UP 3 StackA
5 IDLE RUNNING 5 UP 1001 StackB UP 4 StackA
1001 PASS-THRU DUP-SLOT 2 UP 2 StackB UP 5 StackA
2 SECONDARY RUNNING 2 UP 1003 StackB UP 1001 StackA
1003 PASS-THRU DUP-SLOT 2 UP 1002 StackB UP 2 StackA
1002 PASS-THRU DUP-SLOT 2 UP 1 StackB UP 1003 StackA
1 PRIMARY RUNNING 1 UP 3 StackB UP 1002 StackA
3 IDLE RUNNING 3 UP 4 StackB UP 1 StackA
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
Link A Link A Link B Link B
NI Role State Saved Link A Remote Remote Link B Remote Remote
Slot State NI Port State NI Port
----+-----------+--------+------+-------+-------+-------+-------+-------+-------
1 PRIMARY RUNNING 1 UP 2 StackB UP 8 StackA
2 SECONDARY RUNNING 2 UP 3 StackB UP 1 StackA
3 IDLE RUNNING 3 UP 4 StackB UP 2 StackA
4 IDLE RUNNING 4 UP 5 StackB UP 3 StackA
5 IDLE RUNNING 5 UP 6 StackB UP 4 StackA
6 IDLE RUNNING 6 UP 7 StackB UP 5 StackA
7 IDLE RUNNING 7 UP 8 StackB UP 6 StackA
8 IDLE RUNNING 8 UP 1 StackB UP 7 StackA
