UCS-C210-M2 on the problem of gigabit ethernet ports.

I have 2 x C210 M2 with 2 mother board gigabit ethernet ports and 4 gigabit ethernet ports on a PCI card ports.

PCI 4 port cards work fine.

On the 2 ports on the motherboard, I have a problem with ESXi 4.1:

My 2 ports is auto-negotiation and on the vsphere client speed and duplex of the ports are always displayed correctly.

The switch network where the server is connected is a C-3560.

I use this server for Unified Communications, one I see the problem on downloading large files.

With a virtual machine connection of the unit, when I want to download a file of locale (language file - 650 MB to 1 GB)

The download progress is displayed in MB and it progresses very slowly as 1 MB every many seconds.

Whereas, when I use a map PCI 4 port gigabit port, I can see the progression to go at a speed of tens of MB in the same period.

The only way to have growth to proceed more quickly with the 2 on the main Board gigabit ports, is to set the speed of the 3560 switch

10 Mbps and half duplex. In this case, when we look at the client vsphere, the gigabit on the server port negotiates to 10 MB - half Dupl.

and the progress is constant and much faster that it is at this time to 1000 Gb/s Full Dupl.

Someone has an idea.

My CIMC firmware version is 1.4.1 and I run ESXi 4.1.0

Concerning

Marc - CCIE 2700

Hello Mark,

LRO of ESXi feature works well with the Linux kernel (depending on the version of UC apps, they rest RHEL 4.7 / RHEL 5.5)

Try to turn off RSO on ESXi and check the transfer rate.

http://docwiki.Cisco.com/wiki/Disable_LRO

HTH

Padma

Tags: Cisco DataCenter

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