Did your network folks specifically specify Gbe for the port?
If you just let it be negotiated we've found it doesn't work with our switches.
We ask the network folks to specify Gbe.
-----Original Message-----
From: VM/ESA and z/VM Discussions [mailto:VMESA-***@LISTSERV.UARK.EDU]On
Behalf Of Aria Bamdad
Sent: Wednesday, January 18, 2006 11:28 AM
To: VMESA-***@LISTSERV.UARK.EDU
Subject: Re: OSA Express GbE performance
Thanks Adam and Marcy for your comments.
I guess for now I will stick with the fast ethernet. I am running zVM 4.3
and moving to 5.2 in a month or so. Level 2 will not want to work with
4.3 so there is no point in trying.
Once I am on 5.2 and if I still see the same problem, I will open a PMR.
Aria
We have seem some lousy FTP performance too. I had a PMR open, but no
time to work on it so it got closed.=20
There is a slowness associated with multiple outbound FTP interfaces and
equalcostmultipath. I did receive new module for that.
But my old 9672 system, with a single OSA FDDI card was much faster than
a new z990 system with 4 OSA GbE interfaces. I don't think it's the GbE
though - z/OS here with same network configuration can get 12,000K -
23,000K per second. They have more engines, but still...=20
Open a PMR - I still think there's something not right. Just wish I had
more time to work on that. Glenn S. in Level 2 will be familiar with my
PMR.
Marcy Cortes
Wells Fargo
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-----Original Message-----
Behalf Of Aria Bamdad
Sent: Wednesday, January 18, 2006 7:16 AM
Subject: [VMESA-L] OSA Express GbE performance
Hi,
I was wondering if others have seen the problem I am seeing on a OSA
Express Gigabit Ethernet as compared to a regular OSA Express Fast
Ethernet.
When testing an FTP put from VM to a local FTP server, it appears that I
get two to three times better performance when I use the OSA-E FE than
the GbE.
Both OSAs are connected to the same physical switch. I have looked at
the port statistics on the switch and don't see any errors or anything
else odd. I don't expect to get better performance out of the GbE port
with this test (since the FTP server is on a Fast Ethernet port) but I
would at least expect similar numbers.
Thanks in advance.
Aria.
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