Bay Networks 5390 Administering page 162

Communications server

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Serial Line Internet Protocol (SLIP)

Conﬁguring SLIP for Dial-in

Setting a port to provide dial-in SLIP requires that you conﬁgure the port for both an incoming

modem and a SLIP link. Setting the following parameters conﬁgures the designated ports to

power-up as dedicated SLIP lines.

Routes that cannot be reached until the dial-in SLIP connection is activated are saved in the Model

5390 server at boot time and activated when the SLIP line is activated. When the SLIP connection

is terminated, these routes become inactive.

Conﬁguring Ports for Incoming Modem Connections

Set the mode parameter to slip, cli, auto_detect, auto_adapt, or adaptive (see Port Mode on

page A3-5). If you set the mode to cli, enter a carriage return <CR> to reach the CLI prompt.

Then issue the slip command.

Set the speed parameter to the same value as the speed of the modem serial port, for example,

Set the type parameter to dial_in (this registers the user with the who database as soon as the

CLI process attaches to the line).

Set the end point addresses. One way to do this is to set the local_address and

remote_address parameters. Another method is to set the dialup_addresses parameter to Y

so that the Model 5390 server requests the end point addresses, based on the user's login,

from ACP. (The dialup_addresses parameter overrides the local_address and

remote_address parameters.)

Set up EIA/hardware ﬂow control (RTS/CTS):

Set the input_ﬂow_control and output_ﬂow_control parameters to eia.

Set the control_lines parameter to both. The Model 5390 server asserts RTS when it is ready

to receive data, checks the CTS input before transmitting data, and causes the port to be reset

when the modem hangs up.

The do_compression parameter forces TCP header compression on the SLIP link. When

enabled, the Model 5390 server always sends compressed packets.

The cli_security parameter enables CLI security for a dial-in SLIP line.

If both the enable_security and slip_ppp_security parameters are enabled, access to the slip

command is restricted via ACP and port access is logged in the acp_logﬁle.