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TCP/IP Server Parameters
Server Configuration
4-8
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The remote SLIP hosts should not need extra routing configuration. The only possible change needed
is to make the default route point to the ETS as shown below. You may also wish to configure
gateway hosts on the ETS if non-local TCP/IP sessions will be started.
Figure 4-15: Specifying Default Route
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SLIP connections can be restricted via the Set/Define Server SLIP Password and Set/Define
IPsecurity commands.
4.5.5.1 Configuring Necessary SLIP Parameters
No SLIP session can be started until the ETS knows the IP address of the remote SLIP host, the MTU to use
for the SLIP connection, and whether to forward Broadcast IP packets onto the SLIP line. Each of these
parameters can be set in one of three places: as a default for the entire server, as a default for a particular
port, or when the SLIP session is initiated. The command below specifies a server-wide default MTU.
Figure 4-16: Specifying Defaults
Defaults for a specific port always take precedence over server-wide defaults. A configuration that applies
to one port in particular might look like the following:
Figure 4-17: Configuration of One Port
An IP address can also be specified for a particular port if only one IP address will ever connect to that serial
port.
Figure 4-18: Specifying an IP Address
Default entries can be forced on new sessions so that users cannot override one or more of the port settings
or server defaults. Options enabled in the Define SLIP Port or Define SLIP Default commands, such as
Force, will take precedence over the user’s options entered on the Set/Define SLIP command line.
If Force is enabled, the port’s options will take first precedence, then the server default settings, then the
user-entered options. If Force is disabled, the user-entered options take first precedence, then the port’s
settings, then the default settings. For example, the following series of commands result in an MTU of 1000
because the Force option takes precedence over the user’s request.
Figure 4-19: Forced MTU Value Taking Precedence
% su
# route add default ETSname metric
Local> DEFINE SLIP DEFAULT MTU 512 BROADCAST DISABLED
Local> DEFINE SLIP PORT 5 MTU 640 BROADCAST ENABLED
Local> DEFINE SLIP PORT 5 IPADDRESS 192.0.1.100
Local> DEFINE SLIP DEFAULT MTU 1000 FORCE ENABLED
Local> SET SLIP ADDRESS 192.0.1.20 MTU 500