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Increasing CRC errors on multiple Brocade switches' ports

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Category:
ontap-9
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san
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Applies to

  • Brocade FC switches
  • ONTAP 9

Issue

  • Two switches in the same fabric have increasing CRC errors
  • Switch 1 has increasing crc_err and crc_g_eof on F-port connected to an FC Target adapter:
switchshow        :
[...]
Index Port Address  Media Speed   State       Proto
==================================================
  16  16   011000   id    N16   Online      FC  F-Port  1 N Port + 1 NPIV public 
 
porterrshow        :
          frames        enc     crc     crc   
        tx       rx      in     err     g_eof 
  16:    1.6g    3.1g    0       3.1k    3.0k 
  • EMS IO errors for FC target adapter connected to switch port :
[BAFF-A-01: fct_tpd_work_thread_0: fcp.io.status:debug]: STIO Adapter:1c IO WQE failure, Handle 0x1, Type 8, S_ID: 10100, VPI: 259, OX_ID: 2BF, Status 0x3 Ext_Status 0x16
[BAFF-A-01: fct_tpd_work_thread_0: fcp.io.status:debug]: STIO Adapter:1c IO WQE failure, Handle 0x1, Type 8, S_ID: 11200, VPI: 259, OX_ID: 154, Status 0x3 Ext_Status 0x16
[BAFF-A-01: fct_tpd_work_thread_0: fcp.io.status:debug]: STIO Adapter:1c IO WQE failure, Handle 0x1, Type 8, S_ID: 10200, VPI: 259, OX_ID: 55F, Status 0x3 Ext_Status 0x16
  • Switch 2 has increasing crc_err on an E-Port:
switchshow        :
[...]
Index Port Address  Media Speed   State       Proto
==================================================
  23  23   021700   id    16G   Online      FC  E-Port  10:00:88:94:71:12:34:56 "switch1" (downstream)(Trunk master)  
 
porterrshow        :
          frames        enc     crc     crc   
        tx       rx      in     err     g_eof 
  23:    3.2g    3.6g    0       1.1k    0    
  • SFP transmit and receive power are fine on all ports
  • Investigating the link with increasing crc_err and crc_g_eof first:
    • After moving the cable to a different port and SFP on the switch, errors still increase
    • After replacing the cable, errors still increase
    • After reseating attached device SFP, errors still increase

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