Multisession
is the ability to have a device on a DTC simultaneously associated
with multiple sessions, jobs, or processes on one or more hosts.
Each port can support up to 5 connections and connections
can only be active one at a time; the other connections are in a
"hold" state. The connection establishment method
(Session or Programmatic, that is, FOPEN) for multiple connections
associated with a particular port is determined by the first established
connection. If this is a session then the other multisession connections
to that port must be session. Similarly, if the first connection
is established through the use of a programmatic process, the other
multisession connections must be established through the use of
a programmatic process.
Multisession is only available in a PC-based network environment
(that is, when the DTCs are managed by an OpenView Windows Workstation
on the LAN).
Multisession is supported on switched ports only and some
restrictions apply to nailed devices. See the list below:
Switched Ports:
Multisession is supported only for switched ports.
Non Switched Ports: The DTC
User Interface is not accessible to non switched ports. For Multisession
to establish another connection it needs the DTC User Interface.
Nailed LDEV: If a switched
port is configured as a nailed LDEV on a system, then multiple sessions
from that port to that system are not possible because the port
can have only the one connection associated with the assigned LDEV
on the host system. Although multiple sessions to that particular
host are not possible, it is possible to establish multiple sessions
from that switched port to other systems.
Non Nailed LDEV: If a switched
port is configured as a non nailed LDEV on a system, then multiple
sessions from that port to that system are supported in addition
to multiple sessions to multiple systems.
