From: ldg@ulysium.net
Date: Thu Mar 27 2003 - 20:56:09 EST
Help!!!!
I'm having a networking problem I couldn't solve, I spent more than half a
day yesterday with an other network guy and we never could figure out what's
really wrong...
This is on a new install of tru64 5.1b on a 1200 system. All the networking
was setup the way it should be and there is no way to get that system to
talk to the network. So we've stripped this down to a bare bones networking
with 2 machines on a hub as a local network, with the other machine as a
sniffer and although we could see some packets coming out when we add an ip
to the interface with ifconfig, we couldn't get anything else out of it and
it can't be pinged from the outside either.
It looks like none of the packets are being actually passed by the kernel to
the interface.
This is on a regular tulip de500-aa interface. If we start from a down
interface with nothing configured on it, then bring it up (ifconfig tu0 up)
and add an ip as ifconfig tu0 10.0.1.2 netmask 255.255.255.0 then add the
default route with route add default 10.0.1.1, it should at least allow
pinging from the outside. To test the hardware for sure, I swapped the
drives with those from a similar machine and tried this and that worked fine
on that. I even swapped the interface cards with an other system in
production, so there is nothing wrong with the hardware.
I had noticed that while testing that machine with the drives from an other
that having the extra flag NOARP on the interface causes the same behavior.
I don't have the luxury of re-installing everything from scratch, there's
too much on that new system and it would be time consuming. But it's
probably a small detail we haven't thought of.
I can't post results from netstat or anything like that, as it's impossible
to make it talk to the network.
I tried booting with the genvmunix and that makes no difference, I even
tried building a new kernel without anything extra, taking out ipv6 and
anything else that could get in the way, but no difference.
We've checked and re-checked everything we could look into:
/etc/routes
/etc/networks
ifconfig statements in rc.config (ips,flags...)
even /etc/resolv.conf
netstat shows nothing unusual
restarting networking after changes to any config files...
We couldn't get it to work even when all configuration looks fine and is the
way it should be. What else should we look at then????
-- Didier Godefroy mailto:dg@ulysium.net
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