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<H2><A NAME="s10">10. PLIP on the Source side</A> </H2>
<P>
<P>This section describes how to set up the <CODE>plip</CODE> interface in
the <B>source</B> server. If you run into trouble, I suggest that
you read the
<A HREF="http://www.linuxdoc.org/HOWTO/mini/PLIP.html">PLIP MINI-HOWTO</A>.
<P>
<P>Check that your <CODE>lp</CODE> device is not set. You should
<B>not</B> have this entry:
<P>
<PRE>
$ cat /proc/devices
Character devices:
...
6 lp
...
</PRE>
<P>If you do have it, kill the <CODE>lpd</CODE> daemon and remove the
<CODE>lp</CODE> module:
<P>
<PRE>
$ /etc/rc.d/init.d/lpd.init stop
Shutting down lpd: lpd
$ rmmod lp
</PRE>
<P>If you can't remove the <CODE>lp</CODE> module then you have to
recompile the <B>kernel</B> with <CODE>lp</CODE> service as a module.
<P>Now, the "<CODE>6 lp</CODE>" line has disappeared from the
<CODE>/proc/devices</CODE> file, which is a reflection of the kernel
capabilities.
<P>You are not obliged to eliminate the lp device : the scheme may work
with lp. Without guarantee (it works for me). Check it yourself.
<P>
<P>Check that your parallel port is handled:
<P>
<PRE>
$ ls /proc/parport/
0/
$ cat /proc/parport/0/hardware
base: 0x378
irq: 7
dma: none
modes: SPP,ECP,ECPEPP,ECPPS2
</PRE>
<P>If you don't have any directory under <CODE>/proc/parport/</CODE> then
you have to load the <CODE>parport</CODE> and <CODE>parport_pc
modules</CODE>:
<P>
<PRE>
$ insmod parport
$ insmod parport_pc
</PRE>
<P>You should see this new entry in
<B><CODE>/var/log/messages</CODE></B>:
<P>
<PRE>
Oct 9 20:50:47 louloutte kernel:
parport0: PC-style at 0x378 [SPP,ECP,ECPEPP,ECPPS2]
Oct 9 20:50:47 louloutte kernel:
parport0: detected irq 7;
use procfs to enable interrupt-driven operation.
</PRE>
<P>I repeat the message "detected <CODE>irq 7</CODE>, use procfs to enable
interrupt-driven operation", so:
<P>
<PRE>
$ echo 7 > /proc/parport/0/irq
</PRE>
<P>Using a kernel 2.4 the last command is no longer available. Use instead:
<PRE>
$ insmod parport
$ insmod parport_pc io=0x378 irq=7
</PRE>
<P>
<P>Check that <CODE>plip</CODE> module is loaded:
<P>
<PRE>
$ lsmod |grep plip
</PRE>
<P>If <CODE>plip</CODE> module is not loaded, then load it:
<P>
<PRE>
$ insmod plip
</PRE>
<P>You should see something like this in
<B><CODE>/var/log/messages</CODE></B>
<P>
<PRE>
==> /var/log/messages <==
Oct 8 16:34:12 louloutte kernel:
NET3 PLIP version 2.3-parport gniibe@mri.co.jp
Oct 8 16:34:12 louloutte kernel:
plip0: Parallel port at 0x378, using IRQ 7
</PRE>
<P>If you can't load the <CODE>plip</CODE> module then you have to
recompile the <B>kernel</B> with <CODE>plip</CODE> service as a
module.
<P>The syslog message says the module is loaded on the <CODE>plip0</CODE>
interface. Configure the <CODE>plip0</CODE> interface:
<P>
<PRE>
$ ifconfig plip0 source pointopoint target netmask 255.255.255.255 up
</PRE>
<P>Check that everything is okay.
<P>
<PRE>
$ ifconfig plip0
plip0 Link encap:10Mbps Ethernet HWaddr FC:FC:C0:A8:00:02
inet addr:192.168.0.2 P-t-P:192.168.0.1 Mask:255.255.255.255
UP POINTOPOINT RUNNING NOARP MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0
TX packets:0 errors:0 dropped:0 overruns:0
Interrupt:7 Base address:0x378
</PRE>
<P>
<P>Now you can <CODE>ping</CODE> locally the <B>source</B> server:
<P>
<PRE>
$ ping source
PING source (192.168.0.2): 56 data bytes
64 bytes from 192.168.0.2: icmp_seq=0 ttl=255 time=0.3 ms
64 bytes from 192.168.0.2: icmp_seq=1 ttl=255 time=0.2 ms
--- source ping statistics ---
2 packets transmitted, 2 packets received, 0% packet loss
round-trip min/avg/max = 0.2/0.2/0.3 ms
</PRE>
<P>Verify that the route to <B>target</B> exists:
<P>
<PRE>
$ route
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
target * 255.255.255.255 UH 0 0 0 plip0
</PRE>
<P>If the route doesn't exist, add it:
<P>
<PRE>
$ route add -host 192.168.0.1 dev plip0
</PRE>
<P>
<P>When the <B>target</B> <EM>is</EM> configured you will be able to
do a ping test:
<P>
<PRE>
$ ping target
PING 192.168.0.1 (192.168.0.1): 56 data bytes
64 bytes from 192.168.0.1: icmp_seq=0 ttl=64 time=4.5 ms
64 bytes from 192.168.0.1: icmp_seq=1 ttl=64 time=4.3 ms
--- 192.168.0.1 ping statistics ---
2 packets transmitted, 2 packets received, 0% packet loss
round-trip min/avg/max = 4.3/4.4/4.5 ms
</PRE>
<P>But if you try it now you should have:
<P>
<PRE>
$ ping target
PING target (192.168.0.1): 56 data bytes
--- target ping statistics ---
5 packets transmitted, 0 packets received, 100% packet loss
</PRE>
<P>Now, the server network is ready to work.
Congratulations.
<P>
<P>
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