Hi Managers,
I hope this isn't off topic. We have 2 Alphas; First, an old Dec Alpha
3000/400. I am not sure what model NIC it has installed. It it runs at
10MBps and is connected using Cat5 utp to a DEC repeater 90L+.
The second a new Compaq DS10 which has an on-board 10/100MB
NIC. Again this has a utp connection but connected to a Dlink 10/100
switch (model DES 2334).
Below I have copied the netstats for both servers, please excuse the
formatting. The old server has a database, user files, and lots of
compressed data files. It is an old work horse and seems to be
doing fine the newer. Compaq shows a fantastic amount of network
collisions for a machine that isn't really live although I have been
dumping lots of hi-res compressed images files onto it. The ration is
about 60:40. If you look at the figures the old server has sent out 11
million or so packets and only had 20975 collisions. The Compaq has
sent/received 5727357/4184668 packets and had 2367528 collisions.
To my mind this is worrying.
I have not recompiled the kernel on the new server since I took
stock. The DEC Alpha has been up for one day, the compaq for 5
days.
Does anyone have any thoughts on these collisions? The man page
on netstat does say a great deal. I am not sure whether this is a
server problem or its on the LAN.
Thanx
Dp.
---------------- DEC server ----------------------------
Name Mtu Network Address Ipkts Ierrs Opkts
Oerrs Coll
ln0 1500 <Link> 08:00:2b:3b:74:65 11004295 0
11547587 0 20975
ln0 1500 DLI none 11004295 0 11547587 0
20975
ln0 1500 194.200.237.128 helios 11004295 0 11547587
0 20975
sl0* 296 <Link> 0 0 0 0 0
lo0 4096 <Link> 38687 0 38687 0
0
lo0 4096 loop localhost 38687 0 38687 0
0
ppp0* 1500 <Link> 0 0 0 0 0
--------------- Compaq server -------------------
Name Mtu Network Address Ipkts Ierrs Opkts
Oerrs Coll
lo0 4096 <Link> Link#4 98040 0 98040 0
0
lo0 4096 loop localhost 98040 0 98040 0
0
sl0* 296 <Link> Link#3 0 0 0 0 0
tu0 1500 <Link> 0:10:64:30:5a:61 5727357 0
4184668 0 2367528
tu0 1500 DLI none 5727357 0 4184668 0
2367528
tu0 1500 194.200.237.128 nemesis 5727357 0
4184668 0 2367528
tu1 1500 <Link> 0:10:64:30:5a:5f 0 0 10101
10101 0
tu1 1500 DLI none 0 0 10101 10101
0
tun0* 1280 <Link> Link#5 0 0 0 0
0
~~
Dermot Paikkos * dermot_at_sciencephoto.com
Network Administrator _at_ Science Photo Library
Phone: 0207 432 1100 * Fax: 0207 286 8668
Received on Thu Jul 05 2001 - 16:16:49 NZST