Exchange/SNA Manual

DOWN Command
Exchange/SNA Commands
3–12 104700 Tandem Computers Incorporated
DOWN Command The DOWN command takes the specified subdevice(s) out of service.
DOWN [ ! ] { # subdevice | * }
!
specifies that the subdevices are to be taken out of service immediately, even if
send and receive operations are in progress on the subdevices. This aborts all send
and receive operations on the specified subdevices.
If you omit this parameter, no subdevice is taken out of service until the send or
receive operation on that subdevice has completed. This provides a more orderly
way to take a subdevice out of service, but there is some delay between the
command and the subdevice being taken out of service. If there is no active send
or receive operation on a specified subdevice, that subdevice is taken out of service
immediately. You can use the SHOW command to see if a send or receive
operation is in progress on a given subdevice. See the SHOW command, later in
this section, for more information.
# subdevice
specifies an individual subdevice or a class of subdevices, such as printer
subdevices, to be taken out of service.
subdevice consists of the name of a class of subdevices and, optionally, the unit
number of an individual subdevice within the specified class of subdevices. The
unit number must immediately follow the subdevice class name, with no
intervening blanks.
The subdevice class name must be one to six alphanumeric characters, of which
the first must be a letter. It must be the name of a subdevice class that was defined
when the line server was started.
The unit number must be a number between one and the maximum number of
subdevices of the specified class that are supported by the line server.
If you specify the unit number, only that particular subdevice is taken out of
service. If you omit the unit number, all subdevices of the specified class are taken
out of service.
*
specifies all subdevices in all classes. In this case, all subdevices are taken out of
service. This makes the line server unavailable for any operations until one or
more subdevices are put back into service.