Lantronix ETS Reference Manual - page 63
Server Configuration
TCP/IP Server Parameters
4-11
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The display also shows counters for fragmentation, reassembly, and packets dropped due to
congestion on the SLIP line. The IP errors field shows incoming packets that were discarded due to
protocol problems including checksums errors, header problems, and incorrect source hosts. The ETS
will discard any packets from the SLIP session that are not from the initially-configured host.
4.5.5.5 SLIP Setup Example
Figure 4-25 shows a possible setup to use SLIP with modems. The example shows many of the options; your
situation may not require them all.
Figure 4-25: SLIP Setup Example
1
In order, these commands:
2
Allow ports 4 and 5 to run SLIP, and set them for modem control without flow control. XON/XOFF
flow control cannot be used for SLIP.
3
Set a SLIP password that must be entered by ports issuing a Set SLIP command.
4
Set the server-wide SLIP defaults to disable broadcast IP packets across SLIP sessions, and set an
MTU based on the SLIP specification.
5
Configure port 4 to autostart SLIP to one IP address. Whenever port 4’s serial connection is active
(DSR asserted), it will interpret SLIP packets. The Local> prompt will not be available in this case
until Autostart is disabled.
6
Give port 5 a different MTU than the server default; since no IP address is specified for port 5, it will
have to be specified in the Set SLIP command.
7
Logout both ports so that the Define Port and SLIP commands take effect.
4.5.5.6 Modems with SLIP
If Modem Control is defined on a port set for SLIP Autostart, SLIP is handled slightly differently. In this
case, SLIP will not be started until the port sees assertion of the DSR signal, which generally occurs when
the attached local modem has formed a connection with a remote modem.
Until DSR is asserted, the port will remain idle in non-SLIP mode. It is usable as a service port in this state
until SLIP is started. After SLIP is started, the SLIP session will be closed if the attached modem device de-
asserts the DSR signal.
Local> DEFINE PORT 4,5 SLIP ENABLED MODEM ENABLED FLOW NONE
Local> DEFINE SERVER SLIP PASSWORD “slipag”
Local> DEFINE SLIP PORT 4 IPADDRESS 192.0.1.1 AUTOSTART ENABLED
Local> DEFINE SLIP PORT 5 MTU 512
Local> LOGOUT PORT 4
Local> LOGOUT PORT 5