User Manual

Ports Automatic Protocol Detection
8-4
To enable a port to run SLIP, use the following commands.
Figure 8-5: Enabling SLIP
8.5 Automatic Protocol Detection
An SCS port may be configured to automatically detect a PPP or SLIP packet and, if PPP or SLIP is enabled
on the port, run the appropriate protocol when the first packet is received. This eliminates the need for
callers to explicitly start PPP or SLIP.
In some situations, autodetection should be disabled. For example, SLIP doesn’t support authentication. To
authenticate users, autodetection of SLIP could be disabled; incoming callers would be presented with the
Local> prompt and could be forced to enter the login password. Once authenticated, they could manually
start SLIP by entering the Set SLIP command.
Figure 8-6: Enabling and Disabling Automatic Protocol Detection
Because PPP protocol detection is enabled by default, you should also configure PPP authentication (CHAP
or PAP) wherever possible. CHAP and PAP are enabled by default for all serial ports. If PPP authentication
is not possible, enable user authentication and the Set PPP command to authenticate incoming calls.
If a port is dedicated to PPP or SLIP (see Dedicated Protocols on page 8-7), the protocol will run
automatically when the port is started. Any authentication settings will be ignored.
8.6 Port-Specific Session Configuration
When you log into an SCS port to connect to a network service, your connection is referred to as a session.
A network service may be an interactive login to a TCP/IP host, a connection to a modem or another SCS,
another server, etc. Sessions describe interactive connections; PPP or SLIP connections are not referred to
as sessions.
Session configuration may apply only to the current session, or to all sessions run on a particular port.
Session-specific configuration meets needs that apply only to an active session; for example, if binary files
are being transferred, you could disable interpretation of the switch characters and XON/XOFF flow control
characters.
Note: Only one session at a time will be displayed.
Port-specific session configuration includes the number of sessions permitted on a port, the keys used to
switch between sessions, and the key used to exit from a session to character mode. The commands used to
configure these options are discussed in the following sections.
Local>> DEFINE PORT 2 SLIP ENABLED
Local>> DEFINE PORT 2 PPPDETECT DISABLED
Local>> DEFINE PORT 3 SLIPDETECT ENABLED