Skip to main content
NetApp Knowledge Base

Why does a 25gbE SFP+ in an Element storage node not negotiate to 10gbE?

Views:
570
Visibility:
Public
Votes:
0
Category:
element-software
Specialty:
solidfire
Last Updated:

Applies to

  • Element Software
  • H series storage nodes with 25GbE-capable NICs
    • H610S
    • H410S
    • H300S/H500S/H700S (deprecated)

Answer

Element storage nodes with NICs capable of 25GbE do NOT auto-negotiate to that speed (even with 25GbE SFP+ transceivers connected); however, the switches they connect to can.
 
Storage nodes with 10GbE SFP+ transceivers can be connected to switch ports with 25GbE SFP+ transceivers as the switch is responsible for auto-negotiating the connection speed; however, the switch will negotiate only to 10GbE in that scenario.
 
Ideally, 10GbE transceivers should be used on both the switch and the storage side in this scenario, but in any case the negotiation is at the switch side.
 
 

Additional Information

additionalInformation_text

 

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.