rodfantana
Dabbler
- Joined
- Jun 10, 2017
- Messages
- 27
Hello, I've initially posted an issue in the general section, but it sounds like this is a networking issue with FN, rather than storage related.
PROBLEM: I have a test FN VM that i run iperf on and can't get past 750mbps. Other VMs on the same host sustain 940+ mbps, the issue is only with FN VMs.
For full disclosure - test VM only has 4GB RAM and no storage attached. I realized it's below "requirements", but since there is no storage is attached, and the fact that i'm only using it for iperf testing i think that should be fine for all intended purposes. The FN VM that I use for NAS is exhibiting exact same issues and does meet the min requirements. If you guys think it's really needed to beef up the test VM in order to troubleshoot this, let me know... but at this point i personally don't think it's necessary.
Here are the tests that i've tried with iperf.
Iperf2 test from win7 (physical) to FN on ESX1 has:
iperf2 test from win7 (physical) to win2k16 VM, that sits on the the same ESX host has:
I've tried using both, vmxnet3 and E1000 driver - the results are the same. I spun up an out of the box vanila FN 9.10-U2 VM just to make sure it's not any of my settings that are causing this, and iperf stats are the same. MTU is set to 1500 on FN and vSwitch (all defaults). Do you know if anything needs to be tuned on the FN side to get to 940 Mbit/sec mark?
Thanks,
~Rod.
PROBLEM: I have a test FN VM that i run iperf on and can't get past 750mbps. Other VMs on the same host sustain 940+ mbps, the issue is only with FN VMs.
For full disclosure - test VM only has 4GB RAM and no storage attached. I realized it's below "requirements", but since there is no storage is attached, and the fact that i'm only using it for iperf testing i think that should be fine for all intended purposes. The FN VM that I use for NAS is exhibiting exact same issues and does meet the min requirements. If you guys think it's really needed to beef up the test VM in order to troubleshoot this, let me know... but at this point i personally don't think it's necessary.
Here are the tests that i've tried with iperf.
Iperf2 test from win7 (physical) to FN on ESX1 has:
Code:
Client connecting to 10.0.100.91, TCP port 5001 TCP window size: 208 KByte (default) ------------------------------------------------------------ [ 3] local 10.0.100.151 port 57631 connected with 10.0.100.91 port 5001 [ ID] Interval Transfer Bandwidth [ 3] 0.0- 1.0 sec 106 MBytes 888 Mbits/sec [ 3] 1.0- 2.0 sec 94.2 MBytes 791 Mbits/sec [ 3] 2.0- 3.0 sec 89.8 MBytes 753 Mbits/sec [ 3] 3.0- 4.0 sec 90.8 MBytes 761 Mbits/sec [ 3] 4.0- 5.0 sec 90.5 MBytes 759 Mbits/sec [ 3] 5.0- 6.0 sec 90.9 MBytes 762 Mbits/sec [ 3] 6.0- 7.0 sec 89.5 MBytes 751 Mbits/sec [ 3] 7.0- 8.0 sec 91.0 MBytes 763 Mbits/sec [ 3] 8.0- 9.0 sec 90.8 MBytes 761 Mbits/sec [ 3] 9.0-10.0 sec 89.2 MBytes 749 Mbits/sec [ 3] 0.0-10.0 sec 922 MBytes 774 Mbits/sec c:\tools\iperf-2.0.8b-win64>
iperf2 test from win7 (physical) to win2k16 VM, that sits on the the same ESX host has:
Code:
c:\tools\iperf-2.0.8b-win64>iperf.exe -c srv-backup1 -p 5001 -i 1 ------------------------------------------------------------ Client connecting to srv-backup1, TCP port 5001 TCP window size: 208 KByte (default) ------------------------------------------------------------ [ 3] local 10.0.100.151 port 57658 connected with 10.0.100.13 port 5001 [ ID] Interval Transfer Bandwidth [ 3] 0.0- 1.0 sec 112 MBytes 943 Mbits/sec [ 3] 1.0- 2.0 sec 112 MBytes 942 Mbits/sec [ 3] 2.0- 3.0 sec 112 MBytes 943 Mbits/sec [ 3] 3.0- 4.0 sec 112 MBytes 942 Mbits/sec [ 3] 4.0- 5.0 sec 112 MBytes 943 Mbits/sec [ 3] 5.0- 6.0 sec 112 MBytes 942 Mbits/sec [ 3] 6.0- 7.0 sec 112 MBytes 943 Mbits/sec [ 3] 7.0- 8.0 sec 112 MBytes 942 Mbits/sec [ 3] 8.0- 9.0 sec 112 MBytes 943 Mbits/sec [ 3] 9.0-10.0 sec 112 MBytes 942 Mbits/sec [ 3] 0.0-10.0 sec 1.10 GBytes 942 Mbits/sec c:\tools\iperf-2.0.8b-win64>
I've tried using both, vmxnet3 and E1000 driver - the results are the same. I spun up an out of the box vanila FN 9.10-U2 VM just to make sure it's not any of my settings that are causing this, and iperf stats are the same. MTU is set to 1500 on FN and vSwitch (all defaults). Do you know if anything needs to be tuned on the FN side to get to 940 Mbit/sec mark?
Thanks,
~Rod.
