Hi All,
I've got SSH/SSL (OpenSSH_4.3p2, OpenSSL 0.9.7l 28 Sep 2006)
running under AIX 5.3 (TL5, SP3). It is running on a 9112-265 with
2.5Gb RAM and runs nicely.

Logging on takes no time what so ever. Sub second.

The machine is connected to the Lan at 100Mb/s (verified from
entstat). It it connected via putty from an XP box, also at 100Mb/s.

File transfers using psftp or pscp (putty's secure ftp and cp
respectively) are running at about 20Kb/s!

The transfer via normal FTP is fine.

When the sftp/scp transfers are taking place, the CPU, network and
disk are not being overly loaded. CPU is <10%, disk is <20%.

This is driving me nuts!

Most of what I've read is about slow logons, which is not my
problem.

Anyone have any suggestions?

-Chris

On Tue, 07 Nov 2006 03:57:28 -0800, chrisg wrote:

> Hi All,
> I've got SSH/SSL (OpenSSH_4.3p2, OpenSSL 0.9.7l 28 Sep 2006)
> running under AIX 5.3 (TL5, SP3). It is running on a 9112-265 with
> 2.5Gb RAM and runs nicely.
>
> Logging on takes no time what so ever. Sub second.
>
> The machine is connected to the Lan at 100Mb/s (verified from
> entstat). It it connected via putty from an XP box, also at 100Mb/s.
>
> File transfers using psftp or pscp (putty's secure ftp and cp
> respectively) are running at about 20Kb/s!
>
> The transfer via normal FTP is fine.
>
> When the sftp/scp transfers are taking place, the CPU, network and
> disk are not being overly loaded. CPU is <10%, disk is <20%.
>
> This is driving me nuts!
>
> Most of what I've read is about slow logons, which is not my
> problem.
>
> Anyone have any suggestions?
>
> -Chris

What version of PuTTY are you using? Older versions had a slow transfer
problem. If you don't already have the latest (0.58) and try again.

chrisg@warpspeed.com.au wrote:
> Hi All,
> I've got SSH/SSL (OpenSSH_4.3p2, OpenSSL 0.9.7l 28 Sep 2006)
> running under AIX 5.3 (TL5, SP3). It is running on a 9112-265 with
> 2.5Gb RAM and runs nicely.
>
> Logging on takes no time what so ever. Sub second.
>
> The machine is connected to the Lan at 100Mb/s (verified from
> entstat). It it connected via putty from an XP box, also at 100Mb/s.
>
> File transfers using psftp or pscp (putty's secure ftp and cp
> respectively) are running at about 20Kb/s!
>
> The transfer via normal FTP is fine.
>
> When the sftp/scp transfers are taking place, the CPU, network and
> disk are not being overly loaded. CPU is <10%, disk is <20%.
>
> This is driving me nuts!
>
> Most of what I've read is about slow logons, which is not my
> problem.
>
> Anyone have any suggestions?
>
> -Chris
>

Do you get better performance with other scp or sftp clients? What
throughput do you get if you transfer to another aix server?

On Tue, 07 Nov 2006 03:57:28 -0800, chrisg wrote:

> Hi All,
> I've got SSH/SSL (OpenSSH_4.3p2, OpenSSL 0.9.7l 28 Sep 2006)
> running under AIX 5.3 (TL5, SP3). It is running on a 9112-265 with 2.5Gb
> RAM and runs nicely.
>
> Logging on takes no time what so ever. Sub second.
>
> The machine is connected to the Lan at 100Mb/s (verified from
> entstat).

What does entstat say about the duplex setting?

It's fairly common for managed switch ports to be fixed at 100Mb/s full
duplex. If this is the case the setting in AIX has to match. If AIX is set
to autonegotiate it'll end up at 100Mb/s half duplex. If it shows as half
duplex, try changing it to fixed 100Mb/s full.

Regards, Ian

F. Michael Orr <michael_orr25@yahoo.com> writes:
>On Tue, 07 Nov 2006 03:57:28 -0800, chrisg wrote:
>> File transfers using psftp or pscp (putty's secure ftp and cp
>> respectively) are running at about 20Kb/s!
>
>What version of PuTTY are you using? Older versions had a slow transfer
>problem. If you don't already have the latest (0.58) and try again.

There are further speedups in the post-0.58 development snapshots.

> What does entstat say about the duplex setting?
>
> It's fairly common for managed switch ports to be fixed at 100Mb/s full
> duplex. If this is the case the setting in AIX has to match. If AIX is set
> to autonegotiate it'll end up at 100Mb/s half duplex. If it shows as half
> duplex, try changing it to fixed 100Mb/s full.
>
> Regards, Ian

If this is the case and you changed it and it is still slow (So Ian has
a very good point!) then you colud also if you have a 1Gb card, change
the settings for the ent device:

Enable hardware TX TCP resegmentation yes

Enable hardware transmit and receive checksum yes

Change it to NO then ! (both off them) depending on your network
environment (check with the network guys)

Ian Northeast wrote:
> On Tue, 07 Nov 2006 03:57:28 -0800, chrisg wrote:
>
> > Hi All,
> > I've got SSH/SSL (OpenSSH_4.3p2, OpenSSL 0.9.7l 28 Sep 2006)
> > running under AIX 5.3 (TL5, SP3). It is running on a 9112-265 with 2.5Gb
> > RAM and runs nicely.
> >
> > Logging on takes no time what so ever. Sub second.
> >
> > The machine is connected to the Lan at 100Mb/s (verified from
> > entstat).
>
> What does entstat say about the duplex setting?
>
> It's fairly common for managed switch ports to be fixed at 100Mb/s full
> duplex. If this is the case the setting in AIX has to match. If AIX is set
> to autonegotiate it'll end up at 100Mb/s half duplex. If it shows as half
> duplex, try changing it to fixed 100Mb/s full.

Sorry, I thought that I'd said that (I didn't).

It is at full duplex.

# entstat -d en0
-------------------------------------------------------------
ETHERNET STATISTICS (en0) :
Device Type: IBM 10/100 Mbps Ethernet PCI Adapter (23100020)
Hardware Address: 00:02:55:76:1e:10
Elapsed Time: 0 days 21 hours 43 minutes 43 seconds

Transmit Statistics: Receive Statistics:
-------------------- -------------------
Packets: 488348 Packets: 693062
Bytes: 58246279 Bytes: 293541191
Interrupts: 305 Interrupts: 688495
Transmit Errors: 0 Receive Errors: 0
Packets Dropped: 4 Packets Dropped: 709
Bad Packets: 0
Max Packets on S/W Transmit Queue: 34
S/W Transmit Queue Overflow: 0
Current S/W+H/W Transmit Queue Length: 1

Broadcast Packets: 293 Broadcast Packets: 191719
Multicast Packets: 5 Multicast Packets: 0
No Carrier Sense: 0 CRC Errors: 709
DMA Underrun: 0 DMA Overrun: 0
Lost CTS Errors: 0 Alignment Errors: 0
Max Collision Errors: 0 No Resource Errors: 0
Late Collision Errors: 0 Receive Collision Errors:
0
Deferred: 0 Packet Too Short Errors:
0
SQE Test: 0 Packet Too Long Errors: 0
Timeout Errors: 0 Packets Discarded by
Adapter: 0
Single Collision Count: 0 Receiver Start Count: 0
Multiple Collision Count: 0
Current HW Transmit Queue Length: 1

General Statistics:
-------------------
No mbuf Errors: 0
Adapter Reset Count: 0
Adapter Data Rate: 200
Driver Flags: Up Broadcast Running
Simplex AlternateAddress 64BitSupport
PrivateSegment DataRateSet

IBM 10/100 Mbps Ethernet PCI Adapter Specific Statistics:
------------------------------------------------
Chip Version: 26
RJ45 Port Link Status : up
Media Speed Selected: 100 Mbps Full Duplex
Media Speed Running: 100 Mbps Full Duplex
Receive Pool Buffer Size: 384
No Receive Pool Buffer Errors: 0
Inter Packet Gap: 96
Adapter Restarts due to IOCTL commands: 4
Packets with Transmit collisions:
1 collisions: 0 6 collisions: 0 11 collisions: 0
2 collisions: 0 7 collisions: 0 12 collisions: 0
3 collisions: 0 8 collisions: 0 13 collisions: 0
4 collisions: 0 9 collisions: 0 14 collisions: 0
5 collisions: 0 10 collisions: 0 15 collisions: 0
Excessive deferral errors: 0x0
#

Jacob Nevins wrote:
> F. Michael Orr <michael_orr25@yahoo.com> writes:
> >On Tue, 07 Nov 2006 03:57:28 -0800, chrisg wrote:
> >> File transfers using psftp or pscp (putty's secure ftp and cp
> >> respectively) are running at about 20Kb/s!
> >
> >What version of PuTTY are you using? Older versions had a slow transfer
> >problem. If you don't already have the latest (0.58) and try again.
>
> There are further speedups in the post-0.58 development snapshots.

I was running:

Release 0.53b

Now running, 0.58, it peaked at 40Kb/sec and then dropped back to about
20Kb/sec.

Will look at other issues as well.

I tried/thought that I'd turned off all of NIS 2007 - perhaps I missed
a bit.

-Chris