Skip to main content
NetApp Knowledge Base

Why does the throughput of NIC exceed the theoretical value in System Manager

Views:
148
Visibility:
Public
Votes:
0
Category:
ontap-9
Specialty:
nas
Last Updated:

Applies to

  • ONTAP 9
  • Two 40G ports form an LACP

Answer

  • The throughput limit of two 40G ports is 10GB/s, Because each 40G port is theoretically limited to 5GB/s
  • The reported throughput for this LIF is higher than 12GB/s

WeChat Screenshot_20220719173335.jpg

 

This is the expected behavior:

  • In Full-Duplex mode, Sender can send the data and also can receive the data simultaneously. It is two-way directional communication simultaneously.

  • This throughput reported from System Manager is the sum of In and Out, In and Out can each reach 10GB/s In full-duplex, So the theoretical limit is 20GB/s

Additional Information

  • See the description of full-duplex bandwidth
  • The throughput of LIF seen In AIQ PAS Node View is also the sum of In and Out

WeChat Screenshot_20220725104910.jpg

NetApp provides no representations or warranties regarding the accuracy or reliability or serviceability of any information or recommendations provided in this publication or with respect to any results that may be obtained by the use of the information or observance of any recommendations provided herein. The information in this document is distributed AS IS and the use of this information or the implementation of any recommendations or techniques herein is a customer's responsibility and depends on the customer's ability to evaluate and integrate them into the customer's operational environment. This document and the information contained herein may be used solely in connection with the NetApp products discussed in this document.