FTP slow from Tru 64Ux to any unix server .

[Mr. Sameer Barpande]

While doing get command on tru64ux server from ftp to other server on same subnet/different subnet is fast(Normal).but same file is transfer from ie. put command tru64ux on ftp is very slow. received duplicate acknowledgement. so where is the problem,every server having same problem.
Desperatly I need solution for the same.

[Mulgund]

I guess this is a name to ip and ip to name resolution problem.
Have you made entries of all those servers where you want to put in Tru64 m/c's /etc/hosts file?
Try after making /etc/hosts file entry.
-Srinivas

[Al Licause]

A name resolution issue would only affect the initial connection. I believe what you are seeing is good speed in one direction and slow in the other....correct ?

If so, you need to confirm the speed/duplex mode settings for any interfaces involved. If one system is using gigabit and the others slow speed interfaces, then make sure that flow control is enabled on the gigabit switch.

Check for errors on the network card (netstat -i).

Tcpdump should be used as a last resort to determine just what is happening during the file transfers.

[Ivan Ferreira]

You are having is an auto negotiation problem between the adapter and the switch.

If you have tru64 5 or above, you can use the hwmgr get attr -cat network to see the speed, duplex and autonegotiation configuration for the adapter.

You can use the lan_config command to correct the values.

You can put the lan_config command in the /etc/inet.local file to make changes permanent.

[Ivan Ferreira]

If you use the netstat -ni command, is probably that you will see a lot of output errors and collisions.

[Robert Walker_8]

Hi,

We have experienced a similar thing but it may not be the same problem. We have cisco gear and found Tru64 & Alphas not very good with cisco at autonegotiate.

You may find you are running 100hd on say the switch and 100fd on the host in which case you get good download speed and horrible upload speed.

Suggest then you configure everything as 100fd if you can and the catch ya here is that sysman wont store speed 200 in the rc.config file. You generally have to re-edit it afterwards. This can be tested if you logon via console

ifconfig ee0 down
ifconfig ee0 speed 200
ifconfig ee0 up

We occasionally miss this one and its annoying.

Hope it helps.

Robert.

[Michael Schulte zur Sur]

Hi,

what kind of NIC do you have?
The tulip cards tu0,tu1.. are not good in handling autosensing. They should be set to 100full duplex as said.
But I have had one case with a CISCO switch where that did not work too. In that case we had to set to 100half duplex.

greetings,

Michael