This list is GREAT, within 15 mins. I had 5 responses all saying about the
same thing. My problem is half duplex vs full duplex on the network card
settings. Apparently the Network Manager had set the switch to be only half
duplex because his network management software did not work with full
duplex. I assumed that since we had a big Cabletron switch that it would
use full duplex. Since I want to solve my problem now, I went to the
problem machine's console and as root I ran the command 'ifconfig tu1 speed
10'. This solved my immediate problem, but I still need to shutdown to the
command prompt (>>>) and set the ewa0_mode or ewb0_mode to twisted pair
from twisted pair full duplex. This will update the firmware so the next
boot will be correct. I also will need to look into my other Alpha servers
to confirm the half/full duplex setting. After tonight I bet the UNIX side
of the network will work much more efficiently.
Many Thanks to:
Justin Reddell
Raviprasad Venkatasubbaiah
Sean O'Connell
Robert Leonard
Jim Morton
Henry _at_ DEC/Compaq tech support
My original question:
Managers,
We have an AlphaStation 255/233 running Digital UNIX 4.0B. The system
is very slow for any network file transfers. We have numerous production
processes that are NFS dependent on this machine, so it is critical that we
find a fix. It has a 10BaseT ethernet card (DECchip 21040-AA: Revision:
2.4) installed, as well as the 10BaseT network connection that is
integrated in the system. We only have one network port available, so only
one connection is configured at a time. We have a test FTP file that
transfers in 5 to 10 seconds between other servers (including a different
255/233), but when we attempt to transfer this file to/from this machine it
takes between 20 and 30 minutes. We have un-installed and re-installed NFS
subsets, and reconfigured with the default choices (there are only 3 or 4
users on this system at a time). NIS was configured incorrectly. It was a
slave with no servers listed in /etc/hosts. It is now configured as a
client with two servers in /etc/hosts. Both changes had no effect on the
problem. We have switched network cards and even tried a different network
port, but all attempts have the same poor results. We have been looking at
'netstat', and we continually see 'Ierrs' increasing even when the system
appears to be idle. When we do a file transfer, the 'Ierrs' increase
dramatically. I have compared it's configuration and installed subsets to
another 255/233 that we have on the LAN. I noticed that Network Server for
DU was installed, and it was not on other servers. I de-installed all four
subsets, but we still have the same problems. Are there other subsets that
could cause background network traffic? Is there a script or program that I
could download to check the system's network problem? Is there a
configuration parameter that I am overlooking?
Any advice would be helpful - TIA,
- SDM
Received on Wed Mar 24 1999 - 19:29:08 NZST