From: Ben.Swerts@ua.ac.be
Date: Fri Apr 26 2002 - 10:31:33 EDT
Hi all,
Well, the solution was easy. After a reboot and setting ewa0_mode to
twisted pair, everything worked fine. Thanks go out to Bryan Mills, Ude de
Boer, Selden E Ball Jr, Werner Rost and Brandon Malli. I pasted the very
informative mail from Selden below:
> The very first thing to check is the duplexity of both the host
> network adaptors and of the switch ports that they'replugged into.
>
> A quick fix would be to unplug the ethernet cable briefly, which
> will force a renegotiation.
>
> I don't see any mention of the switches in your posting.
> The switch port's autonegotiation probably didn't work.
> Autonegotiation faiure is too common. Setting the port speed and duplexity
> explicitly in the switch's internal database to match that of the
> connected system(s) is the only reliable way to handle it.
>
> The most common cause of this failure is changing the state of the host
> system's NIC "on the fly". I.e, when the setting in rc.config differs
> from the setting in the SRM so the operating system changes the NIC's
> duplexity after the switch has already decided what speed and duplexity
> to use.
>
> Most switches only set the state of a port after a signal loss,
> when they first gain connectivity to the host. There is no "carrier loss"
> to force renegotiation when the NIC state is changed without a system reset.
>
> An actual hardware problem in the NIC of one of the systems, in the
> cabling, or in the associated switch ports or the switches themselves
> is less likely, but still possible.
>
> I hope this helps a little.
>
> Selden
> ======
> Selden E. Ball, Jr.
Original question:
> > Hi all,
>
> > I recently posted a question about boot problems with an Alphastation
> > 500/500. It has been fixed by replacing the motherboard+CPU.
> > Since the change we have problems with the network.
> > Downloading goes without problems, but uploads are really slow.
>
> > The following actions were performed while logged in on the offending
> > workstation (wsA) with some directories of a workstation wsB mounted via
> > NFS (/wsBdir).
>
> > - When I ftp a file from wsA to wsB it goes really slow (~1 KBps)
>
> > - When I ftp a file from wsB to wsA it goes at normal speed (1 MBps)
>
> > - When I copy a file from ~ to /wsBdir it times out
> > 'cp file : Connection time out'
> > with a message in /var/adm/messages:
> > wsA vmunix: NFS3 RFS3_WRITE failed for server wsB: RPC: Timed out
> > wsA vmunix: NFS3 write error 60 on host wsB
>
> > - When I copy a file from /wsBdir to ~ it goes at normal speed
>
> > - The output for 'ifconfig -a' is exactly the same as for our other
> > workstations:
>
> > tu0: flags=c63<UP,BROADCAST,NOTRAILERS,RUNNING,MULTICAST,SIMPLEX>
> > inet xxx.xxx.6.4 netmask ffff0000 broadcast xxx.xxx.255.255 ipmtu 1500
>
> > sl0: flags=10<POINTOPOINT>
>
> > lo0: flags=100c89<UP,LOOPBACK,NOARP,MULTICAST,SIMPLEX,NOCHECKSUM>
> > inet 127.0.0.1 netmask ff000000 ipmtu 4096
>
>
> > What could be the problem? Any help will be appreciated!
>
>
> > Ben
---------------------------------------------------
Ben Swerts
University of Antwerp - Dept. of Chemistry (C2.29)
Universiteitsplein 1
B-2610 Wilrijk email: ben.swerts@ua.ac.be
Belgium tel: +32-3-820.23.57
---------------------------------------------------
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