Network keeps deactivating

Network keeps deactivating

Post by Abte » Fri, 01 Jan 1999 04:00:00



Hi all,

My network has been working satisfactorily until now.

I can usually ping the host (itself).  But now when I boot, the eth0 is not
activated.  I cannot activate it using netconf (it reckons it is activated).

I deactivated the eth0, apply the changes and go back in again, and change
it to activated again and re-apply the changes, to no avail.  Still cannot
ping.

So I go into X (startx) and use its network configuration and select eth0
from interfaces and activate it and then I save it.  Exit X back to the
shell.  From here on I can ping the host and the other machines can telnet,
etc..  Now if I reboot the machine, I get the same thing again, i.e. I
cannot ping the host and have to do the above all over again.

Any suggestions.

Regards

 
 
 

1. Unable to keep Linux box on network - keeps "disappearing"

    I'm having a bit of trouble with network configuration here, setting
up linux on a 386 here.  Basically, it doesn't stay visible on the network
for longer than a few minutes.  No problems connecting to other machines
from this 386 using ping, nslookup, telnet.  With other machines
connecting to here though (i.e., ping), the 386 "disappears" from the
network after a few minutes.  After that, nothing can to connect it until
I run nslookup or ping (as an example) - then its is "visible" again, but
only for a few minutes.

    I've skimmed through the NET-2 howto and parts of the Net Admin Guide
without finding anything.  I tried using tcpdump/icmpinfo to see what's
happening, but they aren't too helpful (it would be more useful if I had a
second machine to run it on to check the 386 - as it is, running tcpdump
on the 386 with tcpdump dst host 144.25.60.116 stops generating messages
once the 386 disappears from the network.)  I can keep the machine visible
if I run nslookup on a random machine continuously in a loop at minute
intervals.

Machine setup:
Slakware 2.3.0 (kernel 1.2.8)
Etherlink II (3c503 ISA) using AUI connector

Output of "ifconfig eth0":
eth0      Link encap:10Mbps Ethernet  HWaddr 02:60:8C:0C:BA:FB
          inet addr:144.25.60.116  Bcast:144.25.63.255  Mask:255.255.252.0
          UP BROADCAST RUNNING PROMISC MULTICAST  MTU:1500  Metric:1
          RX packets:1103958 errors:0 dropped:850 overruns:0
          TX packets:45945 errors:0 dropped:0 overruns:0
          Interrupt:5 Base address:0x280 Memory:c8000-ca000

Output of "route -n":
Kernel routing table
Destination     Gateway         Genmask         Flags MSS    Window Use Iface
144.25.60.0     *               255.255.252.0   U     1436   0     1270 eth0
127.0.0.0       *               255.0.0.0       U     1936   0       13 lo
default         144.25.60.1     *               UG    1436   0    31835 eth0

    I have source/patches for 1.2.11 and 1.3.9 of the kernel, but wanted
to get this problem fixed first (it would be nice to be able to dial-in
and recompile the kernel while at home.)

    Any ideas on what the problem is or what else I should try to
determine the cause of the problem?  (I remember reading a similar problem
mentioned many, many months ago here, but cannot remember the outcome.)  I
was going to look for another ethernet board on Monday to test with.  Is
there any other information I need to provide which would be helpful?

summary/solution of the problem.  Thanks-

--
Jimmy Yu

Oracle Corporation

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