SUMMARY: Gigabit Ethernet Sloooowness

From: Andrew Shinn <Andrew.Shinn_at_Wiznet.com>
Date: Thu, 22 Mar 2001 09:26:18 -0500

I apologize for the Slooooowness of this summary.. I have been involved in
the most ridiculous Colo project.

I'm not sure where the EXACT problem was.. whether or not the switch wasn't
able to auto negotiate properly or Tru64/DEC gigE adapter. What I ended up
doing was forcing all ports on the switch (Cabletron Matrix E5) to 1000_FULL
and flow control ENABLED. My understanding of gigabit Ethernet is there is
NO half duplex mode.. the only thing negotiated in gigE is flow control. If
this is incorrect please feel free to correct me for I'm not a network
engineer.

I then issued lan_config -i alt0 -a 0 -x 1 ... there appears to be no
higher speed switch in lan_config than 100.. so I just omitted that all
together. Then I just slid the lan_config command into /etc/inet.local

Although this did not fix my NFS problem it did correct the network speeds
as I was then able to FTP a file between 2 machines at like 45MB/s. Before
doing this I was getting about 10-11MB/s.. typical 100Mbit speeds.

---
If anyone reading this has SUCCESSFULLY used Network Appliance "NetApp" NFS
diskservers please respond back to me... I'm having major issues and Compaq
is being less than helpful... which is no surprise since its not one of
their Storageworks products.
Andrew Shinn
WIZNET
andrew.shinn_at_wiznet.com
-----Original Message-----
From: Andrew Shinn 
Sent: Wednesday, March 14, 2001 2:38 PM
To: 'tru64-unix-managers_at_sws1.ctd.ornl.gov'
Subject: Gigabit Ethernet Sloooowness
Hey everyone, I'm using a Compaq ES40, with the DEC Gigabit adapter (DEGSA i
think??) its a 64bit pci card.. on Tru64 5.1.
I got it up and running but its SLOW.. its 100mbit speeds.. does anyone know
of ifconfig speed parameters OR /usr/sbin/lan_config to make sure this thing
is in the right duplex.. i didnt think that was even possible with gigE???
Im so new to gigE. This speed is unaccaptable using a Netapp disk appliance.
Im connecting to a lousy Cabletron SmartSwitch 6000.. so that doesnt help.
ANY ideas will be apreciated! 
-Andrew Shinn

Received on Thu Mar 22 2001 - 14:30:42 NZST