User`s guide

44 Basic Operation
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Preemption of a Local User/Remote Administrator by a Remote Administrator
If an administrator attempts to access a server that is being accessed by the local user or by
another remote administrator with equal privileges, the currently connected user can accept or
reject the preemption request. A message appears asking the connected local user or remote
administrator whether they want to accept the preemption request. If the preemption request is
rejected a message appears informing the remote administrator that their request has been
rejected and that they cannot access the server.
NOTE: If the server being viewed is attached to an Avocent A1000R or A2000R the user is not given the
option to accept or reject preemption.
NOTE: In scenarios where a preemption request can be rejected, the Session Preemption Request
dialog box will appear. This dialog allows you to accept the preemption request by clicking the Accept
button or to reject the preemption request by clicking the Reject button or by closing the dialog box.
Connection Sharing
Connection sharing allows multiple users to interact with a target device at the same time.
When you are a primary user, you may be notified by a dialog box that another user would like to
share your connection. You may select Yes to accept sharing, No to reject sharing, or click the
Passive Share box to allow the new user to share without having any control over the connection.
When you attempt to open a video session with a device that is already being viewed by another
user, you are notified that the device is already being viewed. Depending on the configuration of
sharing settings, you may be offered the option to share or preempt the video session. You may
also be offered the option to open a stealth video session.
NOTE: Stealth video sessions are passive Video sessions, where the primary user is not aware of the
presence of the secondary user. The ability to open a stealth video session is governed by the privilege of
the user. If a user can preempt another user, they can also open a Stealth video session.
Access to the device is governed by the nature of the current user’s connection to the device.
There are two types of Video Session users: a Primary user and up to 11 simultaneous Secondary
users (a single 2161DS-2 or 4161DS appliance supports up to 12 simultaneous sessions across all
attached servers). Only the Primary user can accept or reject preemption requests for all users
sharing a connection. The Primary user also maintains control of video parameters and the
display resolution of the Video session.
Secondary users may be either Active users who have the ability to input mouse and keyboard
data, or Passive users who may not input mouse and keyboard data.
If Automatic Sharing is enabled on the Remote Console Switch, Secondary Users do not need
the permission of the Primary User to join the session.
If a Primary user leaves the session then the oldest Secondary user with Active user privileges
will become the Primary user. If there are no Secondary users with Active user privileges sharing
the session when the Primary user leaves the session, then the session will be closed.
For more information about configuring connection sharing, see “Changing Global Network
and Session Parameters” on page 58.