Specifications
Operat ion
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In
the off state the Console Server will not operate. In the disabled
state, the Console Server will send a System ID message in response to
a local Identify-self or a remote Read-identity or a Counters message
in response to a Read-counters. In the disabled state, the console
will accept a Boot message and make the information available to the
user through Request-poll. In the enabled state, the Console Server
will additionally respond to reservation requests. In the reserved
state, the Console Server will respond to console carrier request from
the system that reserved
it
and to other requests from any system.
The single line arrows represent action taken because of local Network
Management Interface functions. The double line arrows represent
action taken because of received messages. The crossed arrow
represents action taken because of operation within the Console Server
itself.
Network Management forces the Console Server in and out of off state
or disabled state with the Set-state function.
The Console Server moves itself from reserved state
to
enabled state
on the expiration of the reservation timer, whose value
is
set via
Network Management.
The Console Server responds to a local Identify-self with a single
attempt to send a System
ID
message.
Each of the Console Requester functions maps one-to-one to a simple
server action, each function using its corresponding Remote Console
Protocol message. The Console Server actions are:
.
In
response to
a
Request ID message, send a System ID message.
.
In response to a Request Counters message, send
a
Counters
message.