Windows Server 2012 – NIC Teaming slow read speeds

Last Updated: April 28th, 2018Published On: January 13th, 2017By

In 2012 (and R2) you may get slow read speeds with the NIC’s teamed, but write speeds are fine (use lanspeedtest lite to test speeds)

To fix this go to each NIC properties, click the configure button, click advanced and set these options to DISABLED:

largesend offload V2(ipv4)

largesend offload V2(ipv6)

Vm queues

TCP/UDP Checksum offload (ipv4)

TCP/UDP checksum offload (ipv6)

 

This should take effect instantly.

 

Reference Highpointe Dental (highpointe-dc01) if needed

 

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