Skip to main content
NetApp Knowledge Base

FC port negotiates at 8Gbps instead of 16Gbps due to faulty port on HBA card

  1. Last updated
  2. Save as PDF
Views:
170
Visibility:
Public
Votes:
0
Category:
ontap-9
Specialty:
san
Last Updated:

Applies to

  • AFF/FAS/ASA
  • ONTAP 9.1x
  • SAN
  • FCP
  • Cisco/FC SAN switch

Issue

  • Single FC port on the NetApp is consistently negotiating at 8Gbps instead of the expected 16Gbps when connected to switch port on a Cisco switch.
  • Other ports on the same slot with similar hardware connected to same cisco switch are operating at 16Gbps without issue.
  • No specific alert in EMS for this issue, the port reports online.

slot 2: Fibre Channel Target Host Adapter 2c
                (Emulex LPe35000 (LPe35004) rev. 13, <ONLINE>)         

  •  The data link rate for affected port on same HBA card reports 8gig. 

Node: <Node name>
Adapter: 2c
Data Link Rate (Gbit): 8  <--------

  • Below non-disruptive troubleshooting steps were performed:
    • SFP and cable replacement on both ONTAP and switch ends.
    • Enabled trunk mode on switch port and toggled the port.
    • Manually configured both the ONTAP FC port and the corresponding Cisco switch port to operate at 16 Gbps, however, the link failed to come online and the switch port remained down.
    • Port toggling (shut/no-shut, up/down)
    • Connected the switch port cable to an alternate switch port that is known to support 16 Gbps, and the link successfully negotiated and came online at 16 Gbps, confirming that the switch port and cabling were functioning correctly.
    • Isolated that the issue is with NetApp FC port.

Sign in to view the entire content of this KB article.

New to NetApp?

Learn more about our award-winning Support

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.