GETTING THE NETWORKS CARDS UP
=============================

Simon Warner - 29Apr98

Playing with pop1 and the NE2000 (PCI 10Mb) and NetGear FA310TX 
(PCI 100Mb) cards.

Got driver for NE2000 from
  http://cesdis.gsfc.nasa.gov/linux/drivers/ne2k-pci.html

Got driver for NetGear FA310TX (a `tulip' chip based card) from
  http://cesdis.gsfc.nasa.gov/linux/drivers/tulip.html

Both drivers were simple C files which have the code required
for compilation in comments at the end (just do tail). Copied
the sources to /usr/src/modules/

  simeon@pop01 42% cd /usr/src/modules/
  simeon@pop01 43% ls
  compile_ne2k-pci  ne2k-pci.o        tulip.o
  ne2k-pci.c        tulip.c
  simeon@pop01 44% 

Added -D__SMP__ flag to compile code for ne2k-pci driver just in case
it makes any difference. Code is now

  simeon@pop01 44% more compile_ne2k-pci 
  gcc -D__SMP__ -DMODVERSIONS  -DMODULE -D__KERNEL__ -Wall -Wstrict-prototypes -O6
   -fomit-frame-pointer -I/usr/src/linux/drivers/net/ -c ne2k-pci.c

So just source that to compile. Net results are tulip.o and ne2k-pci.o
in that directory. Can install on-the-fly using insmod filname.o. Must
also specify 8390.o driver beforehand for the ne2k-pci.o driver.

Can install these modules with a set of kernal modules by adding then
to the appropriate directory before `make install_modules'. I did this
for the 2.0.32 kernel. So, from /usr/src/linux-2.0.32 on can make
the standard modules with `make modules'. This put links to the
objects in /usr/src/linux-2.0.32/modules. To add in our new modules:

  cd modules

  rm -f tulip.o
  ln -s ../../modules/tulip.o tulip.o

  rm -f ne2k-pci.o
  ln -s ../../modules/ne2k-pci.o ne2k-pci.o

Then edit NET_MODULES to include tulip.o and ne2k-pci.o (it actually already
includes tulip.o since a driver is included). Then, back in 
/usr/src/linux-2.0.32 the modules can be installed in /lib/modules/2.0.32/
and subdirectories with 'make modules_install'.

Check out /usr/src/linux-2.0.32/Documentation/modules.txt


Put sensible things in the configuration file conf.modules:

simeon@pop01 63% more /etc/conf.modules
alias eth0 tulip
options eth0 io=0xec80 
alias eth1 ne2k-pci
options eth1 io=0xef80 
pre-install eth1 insmod /lib/modules/`uname -r`/net/8390.o
alias eth1 ne2k-pci
options eth1 io=0xef80 

#Turn off a couple of things we just don't need
#Simeon Warner - 29Apr98
alias net-pf-4 off      #ipx
alias net-pf-5 off      #appletalk

However, this doesn't seem to be enough to get things started at boot time.
Can be started manually with:
  modprobe tulip
    (to install the tulip driver, then shows up if you run ifconfig)
  ifup eth0
    (starts up eth0 now driver is there)
    
Similarly, to get second ethernet (old NE2000) we can do
  modprobe ne2k-pci
  ifup eth1
  

To do this automatically (since the 'depmod -a' in /etc 
doesn't seem to be enough) I added a couple of lines to
/etc/rc.d/rc.sysinit so it now reads:

if [ -x /sbin/depmod -a -n "$USEMODULES" ]; then
    # Get ready for kerneld if module support in the kernel
    echo -n "Finding module dependencies"
    depmod -a
    echo ""
    echo "SIMEON(/etc/rc.d/rc.sysinit): insmod tulip   (for NetGear card, eth0)"
    insmod tulip
    echo ""
fi

was:

if [ -x /sbin/depmod -a -n "$USEMODULES" ]; then
    # Get ready for kerneld if module support in the kernel
    echo -n "Finding module dependencies"
    depmod -a
    echo ""
fi

Now seems to boot okay!


Additional notes
----------------

System identity is stored in /etc/sysconfig/network. Currently:

NETWORKING=yes
FORWARD_IPV4=no
HOSTNAME=pop01.phy.syr.edu
DOMAINNAME=phy.syr.edu
GATEWAY=128.230.72.254
GATEWAYDEV=eth0

Interface configurations in /etc/sysconfig/network-scripts:

simeon@pop01 81% pwd
/etc/sysconfig/network-scripts
simeon@pop01 82% more ifcfg-eth0
DEVICE=eth0
USERCTL=no
ONBOOT=yes
BOOTPROTO=none
BROADCAST=128.230.72.255
NETWORK=128.230.72.0
NETMASK=255.255.255.0
IPADDR=128.230.72.74
simeon@pop01 83% more ifcfg-eth1 
DEVICE=eth1
USERCTL=no
ONBOOT=no
BOOTPROTO=none
BROADCAST=128.230.72.255
NETWORK=128.230.72.0
NETMASK=255.255.255.0
IPADDR=128.230.72.81

Seems that networking is brought up and down by calls to /sbin/ifup
and /sbin/ifdown (also linked from /etc/sysconfig/network-scripts) from 
/etc/rc.d/init.d/network.


===============================================================================

CHANGING MACHINE IDENTITY AND MOVING TO 306closet
=================================================

must change:

/etc/hosts
/etc/sysconfig/network
/etc/sysconfig/network-scripts/ifcfg-eth?

-- all seemed to work pretty easy.



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