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Benefit of teamed Nics on ESX

Posted on 2016-10-29
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Last Modified: 2016-10-30
If you team up ESX host physical Nics, but the physical links(network cables) are connected to separate physical switches, in this case what benefits do you get from it ?

I am not sure if it will even work.
any clarification ?

Thank you.
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Question by:jskfan
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6 Comments
 
LVL 122
ID: 41865277
1. Resilience

2. Additional Bandwidth and Throughput.

I am not sure if it will even work.
any clarification ?

Why not, if you turn off one physical switch, or remove a network cable, you still have service!
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Author Comment

by:jskfan
ID: 41865290
Let say each ESX NIC is 10GB, and we team up 2 NICs, so it will be 20GB pipe
On the other end,  each Switch port is 10 GB
Outgoing traffic: will it split up ? it comes out as 20GB from ESX then it will split up between 2 links ?
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LVL 122
ID: 41865305
Traffic will leave the virtual switch, and use either nic. So 2 x throughout and bandwidth, and with the benefit of resilience, because if a single nic, cable or switch fails, there is still a network path.

Data from ESXi will leave the server, and use both network interfaces, and you can check this by using esxtop, depending on which Teaming Policy you use.

You can actually see, different VMs using different nics.

Whether you have enough network traffic to saturate both 10GBe links is another question however.
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Author Comment

by:jskfan
ID: 41865313
I know that there is resiliency..

Where I see the headache is if you have 15 GB coming out the Teamed Nics, then how is it going to split the traffic  ,so that some will go through one Link and some will go through other link  ?
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LVL 122

Accepted Solution

by:
Andrew Hancock (VMware vExpert / EE MVE^2) earned 500 total points
ID: 41865318
Virtual Machines!!!!! use different links.....but it depends on what teaming policy employed, and what configuration is on the physical switches, for the effective load balance algorithm.

So one virtual machine A will use one nic, and virtual machine B will use another nic.

It does not split the traffic of 15GB between two nics.

Again, get down and dirty with esxtop, and look at the VMs using the physical nic uplinks...

Look at the performance of network interfaces, look at the counters on your physical switches, and familiarise yourself with differing teaming policies.

Distributed Switches have better Load Balancing policies than standard policies.
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Author Closing Comment

by:jskfan
ID: 41866245
Thank you
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