multicast performance test?

[jackchentoronto]

I am interested to know what kind of bandwidth you get from vSAN health plugin multicast performance test. Right now our vSAN is on a 1G link ( will upgrade it to 10G later) ,  I only get about 80M/s compared with the desired 125M/s bandwidth, wondering what could be done to improve it. It's a newly setup vSAN and no other traffic at all.

We use Dell N4032 switch, the current network configuration is MTU 9000, with igmp snooping enabled and quierer address configured as the switch VLAN interface IP, seems it's working as supposed:

show ip igmp snooping groups

VLAN Group              Reporter          Filter  IIF       Source Address

---- ------------------ ----------------- ------- --------- ---------------

95   224.1.2.3          192.168.51.11     exclude Te1/0/2

95   224.2.3.4          192.168.51.11     exclude Te1/0/2

95   239.255.255.253    192.168.51.11     exclude Te1/0/2

95   224.2.3.4          192.168.51.12     exclude Te1/0/4

95   239.255.255.253    192.168.51.12     exclude Te1/0/4

95   224.1.2.3          192.168.51.13     exclude Te1/0/6

95   224.2.3.4          192.168.51.13     exclude Te1/0/6

95   239.255.255.253    192.168.51.13     exclude Te1/0/6

95   224.2.3.4          192.168.51.14     exclude Te1/0/8

95   239.255.255.253    192.168.51.14     exclude Te1/0/8

I also tried to disable igmp snooping on that vlan, doesn't make any difference on the multicat performance test.

[zdickinson]

Great question!  We have 10 Gb/s end to end and get about 80 Mb/s on the test with 125 Mb/s desired.  However, the test shows as passed, and we're able to push much more than 80 Mb/s during an IOMeter test.  Thank you, Zach.

[jackchentoronto]

Yes, mine also passed the test, just wondering why it only get 80MB/s instead of 125MB/s. For 10Gb network, I would thought it should be 800MB/s or something, maybe there is some limitation/bug on the test itself?

[jonretting]

Yes, showing 80mbs as well. Could this be a deliberate throttling of the test? Thanks, -Jon

[yucubby · Accepted solution]

That's right. Actually, we have set the multicast network performance limitation/target as 1000M/bit during test, so the desired line speed will be 1000*1024**2/8 = 125M/B. And as long as the real network bandwidth is larger than 50M/B, we regard it as PASS.

[jonretting]

Thanks! -Jon