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LACP ifgrp with 40G ports fails to send traffic after upgrade to ONTAP 9.8

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Applies to

  • ONTAP 9.8
  • LACP ifgrp
  • 40 GbE member ports with media type containing "40g_lm4"

Issue

  • LACP ifgrp fails to send traffic after an upgrade to ONTAP 9.8
  • This only applies to LACP ifgrps with 40 GbE member ports using long-range Multimode transceivers 
    • The member ports will have a media type containing the string "40g_lm4"
    • ::> node run -node <node> sysconfig -a
      (truncated...)    
          slot 1: 10/40 Gigabit Ethernet Controller XL710 QSFP+
              e1a MAC Address:    aa:bb:cc:dd:ee:fe (auto-40g_lm4-fd-up)
                  QSFP Vendor:         CISCO-AVAGO     
                  QSFP Part Number:    AFBR-79EBPZ-CS2 
                  QSFP Serial Number:  AVF87654321    
              e1e MAC Address:    aa:bb:cc:dd:ee:ff (auto-40g_lm4-fd-up)
                  QSFP Vendor:         CISCO-AVAGO     
                  QSFP Part Number:    AFBR-79EBPZ-CS2 
                  QSFP Serial Number:  AVF12345678     

 

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