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None This is a configuration error 

Forum: PCMCIA Network Adapter Issues
Re: Question No success with either 10/100 Etherjet nor 3Com cards on Thinkpad (lyle borg-graham)
Date: 2000, Mar 01
From: David Hinds <dhinds@pcmcia.sourceforge.org>

"Network is unreachable" indicates a network configuration error.

>    ++ IPADDR=128.122.146.142
>    ++ NETWORK=128.122.146.0
>    ++ NETMASK=255.255.255.0
>    ++ BROADCAST=128.122.255.255
>    ++ GATEWAY=128.122.146.1

These settings are inconsistent.  Assuming your NETWORK and NETMASK
are correct, you should have BROADCAST=128.122.146.255.

>    + start_fn eth0
>    + /sbin/ifup eth0
>    SIOCADDRT: Network is unreachable

Your network.opts file is odd.  You should either specify all your
network settings in network.opts (as above), or replace the entire
file with just the code from the PCMCIA-HOWTO to use ifup/ifdown to
configure the network.  You should not do both: what happens is the
PCMCIA script configures eth0, then does the "ifup eth0", which
re-configures the interface using the Red Hat netconf data.

> Now, with the cable *unplugged* (128.122.154.50 is another machine):
> 
>    [ root@cognilap ~]# ping 128.122.154.50
>    PING 128.122.154.50 (128.122.154.50) from 128.122.154.50 : 56(84)
> bytes of data.

128.122.154.50 may belong to another machine, but you have also
configured this machine to have the same IP address.  It isn't the IP
address you gave in network.opts, but I'll bet it is the address that
shows up if you run "netconf".  You are pinging yourself; the kernel
knows that the packets don't have to go over the wire, so it works
even when the cable is unplugged.

-- Dave

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1. None Progress, but... by lyle borg-graham, 2000, Mar 01

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