Is there any special guide, how to setup cisco 10 Gigabit switched for nutanix environments?
Im using vsphere 5.0 U3 with nutanix.
Should jumbo frames be enabled?
Is it possible with iperf inside the cvm to get 9 Gbit/s with with one process?
I get 1,57 Gbit/s
Good hints from Intel. The INtel nics are onboard. Which PCI Express speed X4,x8,x16?
This graph is intended to show (not guarantee) the performance benefit of using multiple TCP streams.
PCI Express ImplementationEncoded Data RateUnencoded Data Rate
x15 Gb/sec4 Gb/sec (0.5 GB/sec)
x420 Gb/sec16 Gb/sec (2 GB/sec)
x840 Gb/sec32 Gb/sec (4 GB/sec)
x1680 Gb/sec64 Gb/sec (8 GB/sec)
Maybe useful script:
For me, I had 10 machines to test, so I scripted it instead of running any commands by hand. This is the script I used: https://github.com/dak1n1/cluster-netbench/blob/m...
A single one‐vCPU virtual machine can drive 8Gbps of traffic on the send path and 4Gbps traffic on the receive path when using standard MTU (1500 byte) frames.
Using jumbo frames, a single virtual machine can saturate a 10Gbps link on the transmit path and can receive network traffic at rates up to 5.7Gbps.
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This card has only 10000 Gbit full duplex option in GUI and on command line.
Does this mean, the cisco swith has to be configured also 10000 Gbit full fuplex and not autonegotiate?
On the other side when autonegotiation is disabled option are lost.
Disabling autonegotiation can result in physical links issues going undetected. The Fast Link Pule process does some testing for the physical link properties as well as negotiation on several Ethernet properties.
Here is the sample of config from a customer
interface Ethernet1/3description nutanixswitchport mode trunkswitchport trunk allowed vlan 515,600,602,1666,1755,1794,1837,1841spanning-tree port type edge
Depending on transceiver , you may have to do this
Are you going to run a vSwitch or use a vDS? If you're concered about flooding the port I would recommend using a vDS.
Iperf is on the CVM's of troubleshooting. Usally it's ran when the performance numbers after setup are off to confirm the network settings.
Procedure for 60 second iperf test:
I see that the rx_missed counters go up. Flow Controll is not enabled. Used the standard vswitch with esxi 5.0 U3
After I enabled flow controll on the cisco switch, rx_missed counter is 0.
Good Infos :
2 x 10 Gigabit Configuration