topic Re: slow inbound ftp in Operating System - HP-UX

slow inbound ftp

Brian Lee_4 — Mon, 13 Oct 2003 15:30:47 GMT

OS: HP-UX 11.0
Model: N4000
Duplex: full duplex on NIC and switch
name resolution: /etc/hosts

I updated patch level to March, 2003.
And then inbound ftp got so slow suddenly.
However, outbound is okay.
I checked /var/adm/nettl.LOG00 file and tested name resolution with "nslookup hostname".
They are all fine.
Also, duplex mode is set up as manual full duplex on both NIC and switch.

Anyone can help me resolve this problem?

Re: slow inbound ftp

harry d brown jr — Mon, 13 Oct 2003 15:33:09 GMT

Within your LAN or are you talking about a connection from the internet into your HP?

live free or die
harry

Re: slow inbound ftp

Brian Lee_4 — Mon, 13 Oct 2003 15:37:30 GMT

this is not between internet and intranet.
This problem is happening between two private subnets.

Re: slow inbound ftp

Steven E. Protter — Mon, 13 Oct 2003 15:38:45 GMT

Its almost impossible to believe everything is manual full duplex, but, it should not be manual if your NIC is 1000 BaseT. You don't say. Those really fast GB cards are autonegotiate only, even on the switch.

Check the target filesystem. If its close to full there could be I/O issues.

Check disk bottlenecks with the script I'm attaching.

Think kernel next:
nfiles nflocks
to a much lesser extent:
shmmax,shmseg.

This might be a hardware issue. From outside the HP box, do a continous ping. If the times rise, consider doing a hardware call.

Last, get ready to explore the fun of the ndd command, something, I do not know what might be amiss there.

SEP

Re: slow inbound ftp

Ron Kinner — Mon, 13 Oct 2003 21:45:33 GMT

Check with

lanadmin
lan
display

See if the second page has errors which might indicate a duplex mismatch or other problem. (Duplex mismatch is the most common cause of a difference in the speed of FTP transfers.) If you have more than one NIC you will need to do
ppa x
dislay
where x is either 1 or 2 to see the other one.

Try doing an FTP on the same LAN or to yourself to rule out a network issue or a problem with the other LAN.

I assume we still have lots of space to store files?

Ron

Re: slow inbound ftp

Brian Lee_4 — Tue, 14 Oct 2003 08:41:56 GMT

Thank you for all your answers.
I resolve the problem.
The duplex mode in switch was set as auto.
I changed it full and worked fine.