Configuring a Machine on the Leased Line

The task in this section explains how to set up a router to function as the local peer on your end of a leased line. The task uses the leased line that was introduced in Example—Configuration for a Leased-Line Link as an example.

Prerequisites for Configuring the Local Machine on a Leased Line

Before you perform the next procedure, you must have completed the following:

• Set up and configured the synchronous devices for the link, as described in Configuring Synchronous Devices on the Leased Line

• Obtained the root password for the local machine on the leased line

• Set up the local machine to run as a router on the network(s) to use the services of the leased-line provider

How to Configure a Machine on a Leased Line

1. Become superuser on the local machine (router).

2. Add an entry for the remote peer in the router's /etc/hosts file.

   # vi /etc/hosts # # Internet host table # 127.0.0.1 localhost 192.168.130.10 local2-peer loghost 192.168.130.11 local1-net 10.0.0.25 farISP

   The sample /etc/hosts file is for the local router at the fictitious LocalCorp. Note the IP address and host name for the remote peer farISP at the service provider.

3. Create the file /etc/ppp/peers/peer-name to hold information about the provider's peer.

   For the sample leased-line link, you create the file /etc/ppp/peers/farISP.

   #vi /etc/ppp/peers/farISP init '/etc/ppp/conf_hsi' local /dev/hih1 sync noauth 192.168.130.10:10.0.0.25 nodefaultroute passive persist noccp nopcomp novj noaccomp

   The following table explains the options and parameters that are used in /etc/ppp/peers/farISP.

   Option	Definition
   init '/etc/ppp/conf_hsi'	Starts up the link and configures the HSI interface by using the parameters in the script /etc/ppp/conf_hsi.
   local	Tells the pppd daemon not to change the state of the Data Terminal Ready (DTR) signal and to ignore the Data Carrier Detect (DCD) input signal.
   /dev/hih1	Gives the device name of synchronous interface.
   sync	Establishes synchronous encoding for the link.
   noauth	Disables authentication on the link.
   192.168.130.10:10.0.0.25	Defines the IP addresses of the local peer and the remote peer, separated by a colon.
   passive	Tells the pppd daemon on the local machine to go quiet after issuing maximum number of LCP Configure-Requests and wait for the peer to start.
   persist	Tells the pppd daemon to try to restart the link after a connection ends.
   noccp, nopcomp, novj, noaccomp	Disables the Compression Control Protocol (CCP), Protocol Field compression, Van Jacobson compression, and address and control field compression, respectively. Though these forms of compression accelerate transmissions on a dial-up link, they might slow down a leased line.

4. Create an initialization script that is called demand, which creates the PPP link as part of the booting process.

   # cd /etc/ppp/ # vi demand if [ -f /var/run/ppp-demand.pid ] && /usr/bin/kill -s 0 `/bin/cat /var/run/ppp-demand.pid` then : else /usr/bin/pppd call farISP fi

   The demand script contains the pppd command for establishing a leased-line link. The following table explains the contents of $PPPDIR/demand.

   Code Sample	Explanation
   echo "Starting Solaris PPP 4.0\c"	Displays “Starting Solaris PPP 4.0” during the booting process.
   if ps -e | grep '\<pppd\ > /dev/null 2>&1 ; then echo "\npppd daemon is still running" echo "or in the process of exiting" exit 0	Search for an already existing pppd daemon.   If pppd is found, then send out a message and exit the demand script.
   echo "\nEstablishing PPP session...\n"	Display “Establishing PPP session” during booting.
   /usr/bin/pppd call farISP	Run the pppd command by using the options that are in /etc/ppp/peers/farISP.

   The Solaris PPP 4.0 startup script /etc/rc2.d/S47pppd invokes the demand script as part of the Solaris booting process. The following lines in /etc/rc2.dS47pppd search for the presence of a file that is called $PPPDIR/demand.

   if [ -f $PPPDIR/demand ]; then . $PPPDIR/demand fi

   If $PPPDIR/demand is found, it is executed. During the course of executing $PPPDIR/demand, the link is established.

Where to Go From Here

If you have followed all the procedures in this chapter, you have completed the configuration of the leased-line link.