Preconfiguration
This section explains
how to configure units. Units do not necessarily have to be preconfigured in order to be
added to the stack.
General information: All configurations on the stack, except unit
numbers, are stored on the management unit. This means that a stack unit may be replaced
with another device of the same type without having to reconfigure the switch. Unit numbers
are stored independently on each switch, so that after power cycling the stack, the units
always come back with the same unit numbers. The unit type associated with each unit number
may be learned by the management unit automatically as the units are connected or
preconfigured by the administrator.
- Issue the command
member unit-id
switchindex to preconfigure a unit from the config stack mode.
Supported unit types are shown by the show supported
switchtype command.
- To display
supported switches, use Privileged EXEC mode. Enter the command show supported switchtype SID.
- To add a new
member (see Adding a Unit to an Operating Stack), use
Config stack mode. Enter the command member unit-id.
- Next, configure the unit you just defined with configuration commands, just as if the unit were physically present.
- Ports for the
preconfigured unit come up in "detached" state and can be seen with the show
port all command in Privileged EXEC mode. The detached ports may now be
configured for VLAN membership and any other port-specific configuration.
- After a unit type
is preconfigured for a specific unit number, attaching a unit with a different unit type
for this unit number causes the switch to report an error. The Privileged Exec mode
show switch command indicates "config mismatch" for the new unit and the
ports on that unit do not come up. To resolve this situation, you may change the unit
number of the mismatched unit, using the procedure in Renumbering Stack Members, or delete the preconfigured unit type using the command
no member unit-id from the config
stack mode.