Re: Bizarre one-way network disconnection
On Fri, 2003-08-29 at 20:42, Kevin Buhr wrote:
> Mark Roach <mrroach@okmaybe.com> writes:
> >
> > All of a sudden, the server will reject all network communication on
> > eth0, won't respond to pings, no ssh, no samba. (ssh gives the message :
> > No route to host) However, if I ssh in through eth1 I am able to ping
> > addresses _from_ eth0. If I ifdown eth0 && ifup eth0 everything starts
> > working again.
>
> Sounds a little like it's not responding to ARPs on the "eth0" side.
> Machines that don't already know "eth0"'s MAC address can't send
> packets to it until it responds to an ARP request, but it's not a
> problem when pinging out, for example, because the target host (or the
> router) remembers the IP->MAC mapping when it receives the request
> packet and knows where to deliver the reply on that basis.
>
> Running "tcpdump" on both the misbehaving host and another host while
> trying to (unsuccessfully) ping in to the misbehaving host would
> certainly help show what's going on.
That's a good thought, I had considered that. I think the problem is
resolved now though. I replaced the network card and everything has been
working just fine. I appreciate your help though.
Thanks,
Mark
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