Slow transfer rate between 2 servers next to each other

[Gabriel Muñoz_1]

We have 2 HP-UX 11.1 Servers with IPs 192.168.20.1 and 192.168.20.2. The problem is the data transfer between the 2 servers is *horrendously slow using ftp and rcp*. The connection is fast, but the data transfer not. The telnet connection works ok and fast.

Do anybody know what's happening?

[Uday_S_Ankolekar]

Hi,

What is the speed setup on the lan card.??
You can check this with lanadmin command. If
it is halfduplex then convert to Fullduplex.
the following thread might help :
http://forums.itrc.hp.com/cm/QuestionAnswer/1,,0x8664fd3f91d3d5118ff40090279cd0f9,00.html

Goodluck,
-USA..

[Tim Ryan]

Another thing you might want to check is the speed of the switch ports or hubs that the servers are using. I ran into a similar problem when the network card was set for half duplex and the switch port was set for full. Just make sure they match up with speed and duplex.

Good luck!
-Tim

[Darrell Allen]

Hi Gabriel,

Sounds like a duplex setting mismatch. Verify the NICs on the servers are at 100FD and the switch ports also.

Darrell

[Sachin Patel]

Hi I had same problem few weeks ago. Look the thread

http://forums.itrc.hp.com/cm/QuestionAnswer/1,,0x8664fd3f91d3d5118ff40090279cd0f9,00.html

Sachin

[Sanjay_6]

Hi Gabriel,

Check for the patches, network patch, ftp, telnet patches. It would be better to do a custom patch analysis and download atleast the HP recommended patches and their dependencies. Here is a thread on hp custom patch analysis,

http://us-support2.external.hp.com/wps/bin/doc.pl/sid=408718ec1622f40d4f/screen=wpsHome

Also check for any conflict / limitation in the hardware configuration at your site.

Here is a thread from ITRC on network performance assessment tips,

http://us-support.external.hp.com/cki/bin/doc.pl/sid=6c6db3420970387d12/screen=ckiDisplayDocument?docId=200000055052551

Hope this helps.

Regds

[Bernie Vande Griend]

Definitely sounds like a network interface issue. One or both of the servers may be running at a different speed or duplex than your switch is expecting. Make sure they match. Also, make sure that you do not rely upon autonegotiation. Most of HP's cards do not work real well with autonegotiation. Set this up in the appropriate file in /etc/rc.config.d (depends on what type of card you are using). lanadmin -x # (interface #) will tell you the speed and duplex currently set on an interface, but this commands doesn't work for all NICs, especially 10MBs.

[Gabriel Muñoz_1]

Thanks all. The problem is solved. AUTO_ON must be on. If AUTO_ON is off, the transfer rate is very slow.