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FlexStack Operations
To see FlexStack operation and member status, use the Cisco IOS Software CLI command “show switch.” This
command gives the basic information, including number of members, which member is the master, and state of all
members. The following is a sample output of the command for a stack of 2960-S members:
C2960S-48# show switch
Switch/Stack Mac Address : 0022.bdc4.1d80
H/W Current
Switch# Role Mac Address Priority Version State
----------------------------------------------------------
*1 Master 0022.bdc4.1d80 14 1 Ready
2 Member 0022.bdc4.2300 1 1 Ready
3 Member ec30.912e.2380 1 1 Ready
4 Member 0026.0ac1.3e00 1 1 Ready
The preceding example shows that member 1 is the master. The master has stack priority of 14. All other members
have the default stack priority of 1. The state of all members is ready.
Other possible stack member states are:
●
“progressing”: booting up.
●
“mismatch”: a hardware or software mismatch is preventing the member from fully joining.
●
“provisioned”: this member has been configured, but it is not part of the stack and has never been part of
the stack.
●
“removed”: if there are stack members that are not currently powered on or were removed from the stack,
these members would have the state “removed.”
The MAC address of the master is used as the MAC address of the logical stack. This is the base MAC address
from the master, and it will be used for all IP communications, as well as Cisco Discovery Protocol data exchange
and Spanning Tree Protocol.
To view other operational aspects of the stack, these commands are useful:
●
Show version: view the Cisco IOS Software version of all stack members. Useful if there is a mismatch.
●
Show switch neighbors: view which members are connected to which stack ports.
●
Show switch stack-ports: state of the stack ports on each member.
To determine stack port connectivity and operational status, use the commands “show switch stack-ports”
and “show switch neighbors.” Refer back to Figures 5 and 6. One shows a three-member stack with a full
redundant mode. The other shows a stack in nonredundant mode. Here is what the show commands will show for
each stack, respectively.