Slattach
and ifconfig
don't work like SLIPDo not use slattach
and ifconfig
with
PPP. These are used for SLIP. The pppd
process does these
functions at the appropriate time. These must occur after the
LCP
and IPCP
protocols have been exchanged.
You can not replace pppd
with slattach
and
ifconfig
. Most of the protocol support for PPP is in the
pppd
process. Only the IP (and IPX
when it is
completed) processing is in the kernel.
The host route to the remote system will be automatically added by pppd. There is no option to NOT add the route. The pppd process will terminate if the route could not be added.
The default route may or may not be added. This is controlled by the
option `defaultroute
'. If you have a default route, it will
not be changed.
If you must do routing for an entire network, then put the route
command into the /etc/ppp/ip-up
script. The parameters to the
script are:
$0 - name of the script (/etc/ppp/ip-up or /etc/ppp/ip-down)
$1 - name of the network device (such as ppp0)
$2 - name of the tty device (such as /dev/cua0)
$3 - speed of the tty device in Bits Per Second (such as 38400)
$4 - the local IP address in dotted decimal notation
$5 - the remote IP address in dotted decimal notation
$6 - the value of the 'ipparam' parameter
On sunsite
there is a package called
devinfo.tar.gz
. It contains some useful little programs
which will extract the data from the device and to do various things
with the dotted IP addresses.
The documentation is in the man pages in the file.
For example, if you want to route the entire IP domain to the remote, the
following may be used in /etc/ppp/ip-up
.
Of course, if the values are not variable, then simply use the appropriate entry in the route command.
# Obtain the netmask for the ppp0 (or whatever) device NETMASK = `devinfo -d $1 -t mask` # Obtain the IP domain (without the host address by removing the extra bits) DOMAIN = `netmath -a $5 $NETMASK` # Do the network route now that the IP domain is known route -net add $DOMAIN gw $5
Next Chapter, Previous Chapter
Table of contents of this chapter, General table of contents
Top of the document, Beginning of this Chapter