Recovering From Pass-Through Mode (Duplicate Slot Numbers) - Alcatel-Lucent OmniSwitch 6850 Series Hardware User's Manual

Managing OmniSwitch 6850 Series Stacks
To avoid a pass-through condition following a reboot, make sure that all saved slot values for the stack are
unique. Use the stack set slot
slot 3 from 2 to 3:
-> stack set slot 3 saved-slot 2
Use the show stack topology
-> show stack topology
NI Role
----+-----------+--------+------+-------+-------+-------+-------+-------+-------
1 PRIMARY
2 SECONDARY
3 IDLE

Recovering from Pass-Through Mode (Duplicate Slot Numbers)

The first step in recovering from pass-through is to determine which modules are currently operating in
pass-through, as well as the reason for the pass-through state. To view this information, use the
show stack topology command. For example:
-> show stack topology
NI Role
----+-----------+--------+------+-------+-------+-------+-------+-------+-------
1 PRIMARY
2 SECONDARY
1001 PASS-THRU
Switches operating in pass-through mode are given distinct slot numbers. These slot numbers are not
related to their position in the stack. Instead, they are assigned the prefix "100," followed by the numeri-
cal order in which they were forced into pass-through (1001–1008).
Note. For pass-through elements 1001 through 1008, the slot indicator LED on the chassis front panel
blinks 1 through 8, respectively. For example, if a module enters pass-through and has the slot number
1004, the LED for the module blinks the number 4. For more information on the slot indicator LED, refer
to "Status LEDs" on page
In the example above, the switch with the NI (i.e., slot) number 1001 is operating in pass-through. Note
that the role assignment is PASS-THRU; also, the state displays DUP-SLOT, or duplicate slot number.
This can be further verified by looking down the saved slot column in the table. Note that slot 2, operating
in the secondary management role, has a saved slot value of 2. Slot 1001, operating in pass-through, also
has a saved slot value of 2.
OmniSwitch 6850 Series Hardware Users Guide
command. For example, change the saved slot value for the idle switch in
command to verify the change:
State Saved Link A
Slot State
RUNNING 1 UP
RUNNING 2 UP
RUNNING 3 UP
State Saved Link A
Slot State
RUNNING 1 UP
RUNNING 2 UP
DUP-SLOT 2 UP
2-54.
August 2007
Link A Link A
Remote Remote Link B
NI Port State
3 StackA UP
1 StackB UP
1 StackA UP
Link A Link A
Remote Remote Link B
NI Port State
1001 StackA UP
1 StackB UP
1 StackA UP
Roles Within the Stack
Link B Link B
Remote Remote
NI Port
2 StackA
3 StackB
2 StackB
Link B Link B
Remote Remote
NI Port
2 StackA
1001 StackB
2 StackB
page 4-13