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Re: Problems configuring /etc/network/interfaces



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don't forget to put your isp's dns servers' IPs in /etc/resolv.conf
greetz,
Dani,
dns support.

CB> Hi,

CB> I'm fairly new to Linux and just switched from SuSE to Debian
CB> 2.2.19pre17 a few days ago.  I have a Dell Inspiron 7000 notebook.  I've
CB> tried very hard to solve this problem on my own, but the solution
CB> continues to escape me.

CB> Right now, my /etc/network/interfaces file includes the following lines
CB> (excluding comments):

CB> auto lo
CB> iface lo inet loopback

CB> My understanding is that the "auto lo" line is supposed to activate the
CB> loopback interface at boot time.  But evidently it doesn't.  After I
CB> boot and log in as root, if I ping the localhost at 127.0.0.1, I get the
CB> error message:

CB> neighbor table overflow

CB> At this point, the routing table (route -n command) doesn't list the
CB> loopback interface, and I must manually activate and add it with the
CB> lines:

CB> ifconfig lo 127.0.0.1
CB> route add 127.0.0.1 lo

CB> After doing this, I no longer receive the overflow error and can ping
CB> the localhost.

CB> Strangely (to me), if I comment out the "auto lo" line in
CB> /etc/network/interfaces and reboot, I can then successfully ping the
CB> loopback address, indicating that the interface has been automatically
CB> activated.  (So "auto lo" is evidently shutting it down.  I wish I could
CB> find more thorough instructions for configuring
CB> /etc/network/interfaces.)  Although the interface has been activated
CB> automatically, I still have to add it to the routing table using the
CB> above route command.  But, of course, I don't want to have to add the
CB> route manually every time I reboot.

CB> All of the above was learned while I was trying to figure out my
CB> original problem, which is this:

CB> After successfully connecting to my ISP via serial modem (and after
CB> manually adding the loopback interface), the routing table is as
CB> follows:

CB> Destination      Gateway     Genmask      Flags Metric  Ref Use Iface
CB> 286.115.220.139  0.0.0.0  255.255.255.255   UH     0     0   0   ppp0
CB> 127.0.0.1        0.0.0.0  255.255.255.255   UH     0     0   0   lo
CB> 192.168.1.0      0.0.0.0  255.255.255.0     U      0     0   0   eth0
CB> 0.0.0.0      192.168.1.1  0.0.0.0           UG     0     0   0   eth0

CB> I can ping 286.115.220.139 as well as my machine's local network IP
CB> address at 192.168.1.1, but I can't ping my ISP's DNS servers or
CB> anywhere else on the internet.

CB> So, for several days I've basically been trying to figure out how to
CB> connect to the internet.  I only have a bare minimum installation and
CB> desperately need to add more functionality via apt-get downloads.  I
CB> tried to follow the installation instructions exactly, but now I'm stuck
CB> and feeling helpless.

CB> Sincere thanks for any suggestions,
CB> Charles

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