Re: Network dies
From: Tech (terjec_at_yahoo.com)
Date: 02/17/05
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Date: 17 Feb 2005 00:29:35 -0800
Tauno Voipio <tauno.voipio@iki.fi.NOSPAM.invalid> wrote in message news:<JtGQd.272$Mf.47@read3.inet.fi>...
> Tech wrote:
> > Hello,
> >
> > I've been searching the newsgroups and find quite a bit of information
> > about this but I can't really find the solution. I used to know Unix
> > pretty well many many years ago, so now I'm a bit rusty when it come
> > to Linux. I wanted to set up a Linux Server at work, beeing tired of
> > Windoz for many reasons. (Tried several and ended up with Fedora Core
> > 3.) I've managed to set up Samba and share a printer, but overnight
> > the network dies. I have run /sbin/ifconfig eth0 when the network is
> > up;
> >
> > eth0 Link encap:Ethernet HWaddr 00:01:29:92:7A:80
> > inet addr:10.0.0.28 Bcast:255.255.255.255
> > Mask:255.255.255.0
> > inet6 addr: fe80::201:29ff:fe92:7a80/64 Scope:Link
> > UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
> > RX packets:452 errors:0 dropped:0 overruns:0 frame:0
> > TX packets:521 errors:0 dropped:0 overruns:0 carrier:0
> > collisions:0 txqueuelen:1000
> > RX bytes:41442 (40.4 KiB) TX bytes:46145 (45.0 KiB)
> > Interrupt:10 Base address:0xc000
> >
> > and when it's down;
> >
> > eth0 Link encap:Ethernet HWaddr 00:01:29:92:7A:80
> > inet6 addr: fe80::201:29ff:fe92:7a80/64 Scope:Link
> > UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
> > RX packets:2307 errors:0 dropped:0 overruns:0 frame:0
> > TX packets:11412 errors:0 dropped:0 overruns:0 carrier:0
> > collisions:0 txqueuelen:1000
> > RX bytes:252366 (246.4 KiB) TX bytes:1048949 (1.0 MiB)
> > Interrupt:10 Base address:0xc000
> >
> > The main difference is "inet addr:10.0.0.28 Bcast:255.255.255.255
> > Mask:255.255.255.0" missing when it's down. But why is this hapening?
> > How can I find out, where do I look ? (The Windoz PC's network don't
> > die.)
>
> The symptom you see means that the interface address is disabled,
> maybe taking the interface down and up again without an address.
>
> On reason could be a DHCP lease running out and no refresh available.
>
> Are you setting the interface with a static address or dynamically
> with DHCP?
>
> Please show the output of route -n when the net is up / down.
>
> The IP address seems to be a private address (RFC 1918). Is is an
> internal LAN or an address from an ISP?
I'm using DHCP. 10.0.0.28 is the internal LAN address.
When the net is up, route -n give me;
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
10.0.0.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0
169.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0 eth0
0.0.0.0 10.0.0.1 0.0.0.0 UG 0 0 0 eth0
when its down;
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
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