The stack member number (1 to 8) identifies each member in the
switch stack. The member number also determines the interface-level
configuration that a stack member uses. You can display the stack member number
by using the
show switch
EXEC command.
A new, out-of-the-box
Switch
(one that has not joined a
Switch
stack or has not been manually assigned a stack member number) ships with a
default stack member number of 1. When it joins a
Switch
stack, its default stack member number changes to the lowest available member
number in the stack.
Stack members in the
same
Switch
stack cannot have the same stack member number. Every stack member, including a
standalone
Switch,
retains its member number until you manually change the number or unless the
number is already being used by another member in the stack.
-
If you manually
change the stack member number by using the
switch
current-stack-member-number
renumber
new-stack-member-number
global configuration command, the new
number goes into effect after that stack member resets (or after you use the
reload slot
stack-member-number privileged EXEC command) and
only if that number is not already assigned to any other members in the stack.
Another way to change the stack member number is by changing the
Switch_NUMBER
environment variable.
If the number is
being used by another member in the stack, the
Switch
selects the lowest available number in the stack.
If you manually
change the number of a stack member and no interface-level configuration is
associated with that new member number, that stack member resets to its default
configuration.
You cannot use the
switch
current-stack-member-number
renumber
new-stack-member-number
global configuration command on a
provisioned
Switch.
If you do, the command is rejected.
-
If you move a
stack member to a different
Switch
stack, the stack member retains its number only if the number is not being used
by another member in the stack. If it is being used, the
Switch
selects the lowest available number in the stack.
-
If you merge
Switch
stacks, the
Switch
that join the
Switch
stack of a new
active switchstack master select the lowest
available numbers in the stack.
As described in the
hardware installation guide, you can use the
Switch
port LEDs in Stack mode to visually determine the stack member number of each
stack member.
In the
default mode Stack LED will blink in green color only on the stack
master. However, when we scroll the Mode button to
Stack option - Stack LED will glow green on all the stack members.
When mode button is
scrolled to
Stack option, the switch number of each stack member will be
displayed as LEDs on the first five ports of that switch. The switch number is
displayed in binary format for all stack members. On the switch, the amber LED
indicates value 0 and green LED indicates value 1.
Example for switch number 5 (Binary - 00101):
First five LEDs will glow in below color combination on stack member
with switch number 5.
-
Port-1 : Amber
-
Port-2 : Amber
-
Port-3 : Green
-
Port-4 : Amber
-
Port-5 : Green
Similarly first five
LEDs will glow in amber or green, depending on the switch number on all stack
members.
Note |
-
If we connect a
Horizontal stack port to a normal network port on other end, stack port
transmission/reception will be disabled within 30 seconds if there are no SDP
packet received from the other end.
-
Stack port
will not go down but only transmission/reception will be disabled. The log
message shown below will be displayed on the console. Once the peer end network
port is converted to stack port, transmission/reception on this stack port will
be enabled.
%STACKMGR-4-HSTACK_LINK_CONFIG: Verify peer stack port setting for hstack StackPort-1 switch 5 (hostname-switchnumber)
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