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Catalyst 4500 Series Switch, Cisco IOS Software Configuration Guide - Cisco IOS XE 3.9.xE and IOS 15.2(5)Ex
 
Chapter 5      Configuring Virtual Switching Systems
Configuring a VSS
(Optional) Configuring VSS Standby Switch Modules
Note You cannot configure or provision modules on VSS.
When switches form initial VSS relationships, they send module information to each other and this 
information is pushed to the configuration and used subsequently for provisioning, provided the switch 
is booting and the peer is down or not present.
The following example shows the module provisioning information:
module provision switch 1
 slot 1 slot-type 148 port-type 60 number 4  virtual-slot 17
 slot 2 slot-type 137 port-type 31 number 16  virtual-slot 18
 slot 3 slot-type 227 port-type 60 number 8  virtual-slot 19
 slot 4 slot-type 225 port-type 61 number 48  virtual-slot 20
 slot 5 slot-type 82 port-type 31 number 2  virtual-slot 21
module provision switch 2
 slot 1 slot-type 148 port-type 60 number 4  virtual-slot 33
 slot 2 slot-type 227 port-type 60 number 8  virtual-slot 34
 slot 3 slot-type 137 port-type 31 number 16  virtual-slot 35
 slot 4 slot-type 225 port-type 61 number 48  virtual-slot 36
 slot 5 slot-type 82 port-type 31 number 2  virtual-slot 37
These commands are not available to the user and that various numbers used in these commands are 
internal to the system and used to identify a module. These commands are written to the startup-config 
when a switch detects a given module while it is running in VSS mode. When reconverted to standalone 
mode, these commands are removed from the startup-config.
Displaying VSS Information
To display basic information about the VSS, perform one of these tasks:
The following example shows the information output from these commands:
Switch# show switch virtual
Executing the command on VSS member switch role = VSS Active, id = 1
Switch mode                  : Virtual Switch
Virtual switch domain number : 100
Local switch number          : 1
Local switch operational role: Virtual Switch Active
Peer switch number           : 2
Peer switch operational role : Virtual Switch Standby
Executing the command on VSS member switch role = VSS Standby, id = 2
Switch mode                  : Virtual Switch
Command Purpose
Switch# show switch virtual 
Displays the virtual switch domain number, and the 
switch number and role for each of the switches.
Switch# show switch virtual role
Displays the role, switch number, and priority for 
each of the switch in the VSS.
Switch# show switch virtual link
Displays the status of the VSL.