Re: Gb Ethernet

[DrFranken <midrange@xxxxxxxxxxxx>]

(Sorry I saw this unsent from a few days ago....)

I've not seen the 6B26 unless I've created an aggregated line. I suppose 
it's possible you've restored from or cloned a partition that had an 
aggregated line?  In any case you're not using that so it's likely 
unrelated to your performance problem.

Now that we've established the use of the 181C for your Ethernet line 
let's chase that down.  I have one customer who had a mystery slowdown 
on the 181C card for ONLY ONE partition on their server. They switched 
to the backup port and we never did figure out what the problem was with 
the original port.

Next thing I would verify, because you are stepping outside the server, 
is the stats on the switch ports.  First verify that the ports are 
linked up correctly (hopefully Full Duplex and 1Gb speed.)  Also check 
for any errors. If you see lots of errors (nearly any type) on a port 
that's going to cause lots of TCP retries and slow the throughput 
dramatically.

A 'silly test' I like to do on IBM i is to PING the other server using 
the maximum count (999) and frame size (usually 1492). Then check the 
joblog for consistency and any amount of errors. You should get 999 
responses for a local ping!  THEN repeat this test DURING the FTP 
transmission. Given your issue I suspect that you'll see many missed 
pings during the transfer indicating errors.

        - Larry "DrFranken" Bolhuis

www.frankeni.com
www.iDevCloud.com
www.iInTheCloud.com

On 1/10/2013 12:02 PM, rob@xxxxxxxxx wrote:
> Now that I've confused everyone...
> The target lpar (guest) has
> Resource        Type  Status                Text
> CMB03           268C  Operational           Combined function IOP
>    LIN04         6B26  Operational           Comm Adapter
> CMB04           6B03  Operational           Comm Processor
>    LIN02         6B03  Operational           Comm Adapter
>      CMN01       6B03  Operational           Comm Port
> CMB05           6B03  Operational           Comm Processor
>    LIN01         6B03  Operational           Comm Adapter
>      CMN02       6B03  Operational           Comm Port
> CMB06           181C  Operational           Comm Processor
>    LIN03         181C  Operational           Comm Adapter
>      CMN03       181C  Operational           Ethernet Port
>
> I am NOT using CMB03/LIN04.  My line description LANLIN is using CMN03,
> not CMB03.
> According to my reading, a 6B26 may just show up if your system is
> eligible for aggregate ethernet.  It does not indicate that you're using
> it.  So I guess that means that simply putting on the right TR may add
> that?
>
> I am also not sharing any ports between lpars.
> Resource name  . . . . . . . :   CMN03
> Text . . . . . . . . . . . . :   Ethernet Port
> Type-model . . . . . . . . . :   181C-001
> Serial number  . . . . . . . :   YL1327300141
> Part number  . . . . . . . . :   42R7000
> Location :   U789D.001.DQDZPZK-P1-C10-T3
> Logical address:
>   PCI bus:
>    System bus                       1669
>    System board                     0
>    System card                      1
>   Communications:
>    I/O bus                          14
>    Adapter                          0
>    Port                             1
>
>
> Rob Berendt