Hi all,
I'm experiencing poor networking performance on some VMs running on VMware ESXi 3.5 Update2 on top of an Intel S5000PAL system with two quad core X5410 and 8 GB ram.
I'm using only the two onboard NIC with or without VLAN tagging but nothing changes.
Right now I have one of the two NIC configured for the management network and for the production LAN with 3 VMs with no particular need in network traffic.
The second NIC is dedicated to DMZ, with 2 VMs with no need in network traffic.
The performance TAB on the ESXi host tell me that the average of network traffic is about 50 Kb/s and there was no utilization peak in the last month.
The problem is that sometimes network communications with VMs go away without any reason, and came back in a couple of seconds with good performance.
If I send some ICMP packets to one of the VMs (even in production LAN or in DMZ) I have something similar :
Risposta da 192.168.1.231: byte=32 durata<1ms TTL=128
Risposta da 192.168.1.231: byte=32 durata<1ms TTL=128
Risposta da 192.168.1.231: byte=32 durata<1ms TTL=128
Risposta da 192.168.1.231: byte=32 durata<1ms TTL=128
Risposta da 192.168.1.231: byte=32 durata<1ms TTL=128
Richiesta scaduta.
Risposta da 192.168.1.231: byte=32 durata<1ms TTL=128
Risposta da 192.168.1.231: byte=32 durata<1ms TTL=128
Risposta da 192.168.1.231: byte=32 durata<1ms TTL=128
Risposta da 192.168.1.231: byte=32 durata<1ms TTL=128
Risposta da 192.168.1.231: byte=32 durata<1ms TTL=128
Risposta da 192.168.1.231: byte=32 durata<1ms TTL=128
Risposta da 192.168.1.231: byte=32 durata<1ms TTL=128
Risposta da 192.168.1.231: byte=32 durata<1ms TTL=128
Risposta da 192.168.1.231: byte=32 durata<1ms TTL=128
Risposta da 192.168.1.231: byte=32 durata=1648ms TTL=128
Risposta da 192.168.1.231: byte=32 durata<1ms TTL=128
Risposta da 192.168.1.231: byte=32 durata<1ms TTL=128
Risposta da 192.168.1.231: byte=32 durata<1ms TTL=128
Risposta da 192.168.1.231: byte=32 durata<1ms TTL=128
Risposta da 192.168.1.231: byte=32 durata<1ms TTL=128
Risposta da 192.168.1.231: byte=32 durata<1ms TTL=128
Risposta da 192.168.1.231: byte=32 durata<1ms TTL=128
Risposta da 192.168.1.231: byte=32 durata<1ms TTL=128
Risposta da 192.168.1.231: byte=32 durata<1ms TTL=128
Risposta da 192.168.1.231: byte=32 durata<1ms TTL=128
Risposta da 192.168.1.231: byte=32 durata<1ms TTL=128
Risposta da 192.168.1.231: byte=32 durata<1ms TTL=128
Risposta da 192.168.1.231: byte=32 durata<1ms TTL=128
So some lost packets, and some with very poor answer time.
I've just tried to check the bandwith to some VMs and the results was something similar :
iperf.exe -c 192.168.1.2 -i 5 -t 60
-
Client connecting to 192.168.1.2, TCP port 5001
TCP window size: 8.00 KByte (default)
-
local 192.168.1.242 port 5044 connected with 192.168.1.2 port 5001
Interval Transfer Bandwidth
0.0- 5.0 sec 55.2 MBytes 92.6 Mbits/sec
5.0-10.0 sec 54.4 MBytes 91.2 Mbits/sec
10.0-15.0 sec 43.4 MBytes 72.8 Mbits/sec
15.0-20.0 sec 45.0 MBytes 75.5 Mbits/sec
20.0-25.0 sec 53.9 MBytes 90.5 Mbits/sec
25.0-30.0 sec 53.7 MBytes 90.1 Mbits/sec
30.0-35.0 sec 54.5 MBytes 91.4 Mbits/sec
35.0-40.0 sec 55.2 MBytes 92.5 Mbits/sec
40.0-45.0 sec 55.3 MBytes 92.7 Mbits/sec
45.0-50.0 sec 40.4 MBytes 67.8 Mbits/sec
50.0-55.0 sec 0.00 Bytes 0.00 bits/sec
55.0-60.0 sec 11.6 MBytes 19.5 Mbits/sec
0.0-60.0 sec 523 MBytes 73.0 Mbits/sec
I was connected to a 100 Mb/s switch so about 90 Mb/s is good, but the other value is not so good.
I've check the hardware twice, update all BIOS, firmware, and so on of the phisical server .....
Any hint ?
Thank you in advance.
Bye
Riccardo Riva
VCP,RHCE,FCNSA
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RRiva | http://about.me/riccardoriva | http://www.riccardoriva.com
