Dell PowerEdge M420 Reference Manual page 1574

The show switch command may show an SDM Mismatch value in the Switch
Status field. This value indicates that the unit joined the stack, but is running
a different SDM template than the management unit. This status should be
temporary; the stack unit should automatically reload using the template
running on the stack manager.
Use the show supported switchtype command to display switch SIDs.
Use the show stack-ports command to display details regarding stacking links.
Use the show slot command to display details regarding slot configuration.
Use the show sdm prefer command to display the SDM template
configuration.
Syntax
show switch [chassis-mgmt | stack–member–number | stack–ports[counters
| diag] | stack–standby]
Parameter Description
Parameter
unitid
chassis-mgmt
stack–member–number The stack member number.
stack–ports
counters
diag
stack–standby
Default Configuration
This command has no default configuration.
Command Mode
User EXEC, Privileged EXEC modes
1570
System Management Commands
Description
The unit number.
Display chassis management.
Display summary stack-port information for all interfaces.
Display summary data counter information for all interfaces.
Display front panel stacking diagnostics for each port.
Display the configured or automatically selected standby
unit number.