From: DC GVA (johnladd68@googlemail.com)
Date: Mon Feb 04 2008 - 08:08:16 EST
Hello,
We have two V490s between which we would like to achieve the fastest
possible ethernet connection. Both the built in interfaces, and the
additional 4 port network card are meant to be gigabit, but our measurements
have rarely shown more than 450Mb/s. We would like to see at least around
800Mb/s.
We have a single CISCO 2960G switch in between the machines on which we see
no errors or congestion, all interfaces are set to gig.
We have been using iPerf for the measurements.
We have tried the tuning suggestions here:
http://www.psc.edu/networking/projects/tcptune/#Solaris
but it seems to make things worse (100Mb/s).
We are using Solaris 10 patched around 2 months ago with all the latest
patches.
Someone suggested this maybe due to the bus speed. All interfaces appear to
be on the 33MHz PCI bus. We do not have any free 66MHz slots for the
external NIC:
Bus Max
IO Port Bus Freq Bus Dev,
Type ID Side Slot MHz Freq Func State Name
Model
---- ---- ---- ---- ---- ---- ---- ----- --------------------------------
----------------------
PCI 8 B 3 33 33 3,0 ok pci-pci8086,537c.7/network (netw+
PCI-BRIDGE
PCI 8 B 3 33 33 0,0 ok network-pci100b,35.30
SUNW,pci-x-qge/pci-bri+
PCI 8 B 3 33 33 1,0 ok network-pci100b,35.30
SUNW,pci-x-qge/pci-bri+
PCI 8 B 3 33 33 2,0 ok network-pci100b,35.30
SUNW,pci-x-qge/pci-bri+
PCI 8 B 3 33 33 3,0 ok network-pci100b,35.30
SUNW,pci-x-qge/pci-bri+
PCI 8 A 0 66 66 1,0 ok SUNW,emlxs-pci10df,fc10/fp (fp)
LP11000-S
PCI 8 A 1 66 66 2,0 ok SUNW,emlxs-pci10df,fc10/fp (fp)
LP11000-S
My question - What is the maximum speed I can expect in such a
configuration, and how to achieve it?
A sub question may be - Is iPerf the best way to test the speed, and if not
can someone suggest something else?
Thanks in advance.
John
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