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Re: different networks, same computer (map mapping ?)

Apparently, _John Schmidt_, on 01/11/04 19:48,typed:

I have a similar setup. I used ifplugd and guessnet. You have to modify slightly /etc/network/interfaces. I supposed you don't need ifplugd, but it is nice to be able to start up my laptop quickly without having any type of network cable installed. Once you plug a cable in, ifplugd will configure things for you.
Anyway, here are some snippets from my /etc/network/interfaces file:

# The primary network interface
# turn off since ifplugd is controlling things
#auto eth0

mapping eth0
        script /usr/sbin/guessnet-ifupdown
        map default: none
        map timeout: 3
        map verbose: true

iface work inet dhcp
        test-peer address x.x.x.x MAC.address

iface home inet static
        test-peer address MAC.address

Note: x.x.x.x is the IP address of a known computer on the network that should be always there. The MAC.address is the hardware MAC address of this computer.

Pretty simple setup but works nicely.


I installed ifplugd and guess-net. My ifplugd config is:
{~}> cat /etc/default/ifplugd
# This file may be changed either manually or by running dpkg-reconfigure.
# N.B.: dpkg-reconfigure deletes everything from this file except for
# the assignments to variables INTERFACES, HOTPLUG_INTERFACES, ARGS and
# SUSPEND_ACTION.  When run it uses the current values of those variables
# as their default values, thus preserving the administrator's changes.
ARGS="-q -f -u0 -d5 -w -I"

and my interfaces file is:

{~}> cat /etc/network/interfaces
# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).

# The loopback network interface
auto lo
iface lo inet loopback

mapping eth0
        script /usr/sbin/guessnet-ifupdown
#       map home work
        map default: none
        map timeout: 3
        map verbose: true

#home network
iface home inet dhcp
        test-peer address source

#university network
iface work inet static
        address X.Y.Z.A
        gateway X.Y.Z.1
        network X.Y.Z.0
        broadcast X.Y.Z.255
        dns-nameservers a.b.c.d e.f.g.h
        test-peer address a.b.c.d source X.Y.Z.A

This setup doesn't work. The boot process hangs just after the "starting MTA: Exim" message. But I choose the interfaces file so that eth0 is configured at dhcp in my home, the boot process works and a few messages after "starting MTA: exim" it also gives the message "network interfaces plugging demon".

Could you give more information about your interfaces file and ifplugd config.? I seem to be missing something very basic here.


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