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New Member

"Error disabled - bit error rate too high" on Cisco MDS 9148 switch.

 

Hi,

I have a Cisco 9148 switch, from which one port goes to "Error Disable" state even after shut-noshut. This port is connected to my storage

Following are the details of the switch and Config.

Software
  BIOS:      version 1.0.21
  loader:    version N/A
  kickstart: version 6.2(7)
  system:    version 6.2(7)
  BIOS compile time:       01/27/14
  kickstart image file is: bootflash:///m9100-s3ek9-kickstart-mz.6.2.7.bin
  kickstart compile time:  3/12/2014 18:00:00 [03/30/2014 08:19:34]
  system image file is:    bootflash:///m9100-s3ek9-mz.6.2.7.bin
  system compile time:     3/12/2014 18:00:00 [03/30/2014 10:17:33]

 

SAN1# sh run int fc 1/15

!Command: show running-config interface fc1/15
!Time: Sun Jun 29 23:01:42 2014

version 6.2(7)

interface fc1/15
  switchport trunk mode off
  port-license acquire
  no shutdown

SAN1#

WHEN ITS UP :-

SAN1# sh int fc 1/15
fc1/15 is up
    Hardware is Fibre Channel, SFP is short wave laser w/o OFC (SN)
    Port WWN is 20:0f:00:2a:6a:21:26:a0
    Admin port mode is auto, trunk mode is off
    snmp link state traps are enabled
    Port mode is F, FCID is 0x7f0500
    Port vsan is 2
    Speed is 4 Gbps                                                                                                 //  SFP is of 8G and the storage port is at Auto state
    Rate mode is dedicated
    Transmit B2B Credit is 40
    Receive B2B Credit is 32
    Receive data field Size is 2112
    Beacon is turned off
    admin fec state is down
    oper fec state is down
    5 minutes input rate 592 bits/sec,74 bytes/sec, 0 frames/sec
    5 minutes output rate 272 bits/sec,34 bytes/sec, 0 frames/sec
      13386138 frames input,818359088 bytes
        0 discards,830 errors
        0 invalid CRC/FCS,0 unknown class
        0 too long,242 too short
      27062166 frames output,8924197768 bytes
        4 discards,0 errors
      20 input OLS,8  LRR,1 NOS,3 loop inits
      132 output OLS,136 LRR, 12 NOS, 19 loop inits
      32 receive B2B credit remaining
      37 transmit B2B credit remaining
      37 low priority transmit B2B credit remaining
    Interface last changed at Sun Jun 29 23:03:03 2014

    Last clearing of "show interface" counters  :never

SAN1#

 

WHEN ITS DOWN :-

SAN1# sh int fc 1/15
fc1/15 is down (Error disabled - bit error rate too high)
    Hardware is Fibre Channel, SFP is short wave laser w/o OFC (SN)
    Port WWN is 20:0f:00:2a:6a:21:26:a0
    Admin port mode is auto, trunk mode is off
    snmp link state traps are enabled
    Port vsan is 2
    Receive data field Size is 2112
    Beacon is turned off
    5 minutes input rate 0 bits/sec,0 bytes/sec, 0 frames/sec
    5 minutes output rate 0 bits/sec,0 bytes/sec, 0 frames/sec
      13385952 frames input,818338116 bytes
        0 discards,755 errors
        0 invalid CRC/FCS,0 unknown class
        0 too long,225 too short
      27062024 frames output,8924188468 bytes
        4 discards,0 errors
      20 input OLS,8  LRR,1 NOS,3 loop inits
      131 output OLS,134 LRR, 12 NOS, 18 loop inits
    Interface last changed at Sun Jun 29 22:36:33 2014

    Last clearing of "show interface" counters  :never

SAN1#

Logs :

2014 Jun 29 22:17:14 NGCORPSAN1 %PORT-5-IF_DOWN_BIT_ERR_RT_THRES_EXCEEDED: %$VSAN 2%$ Interface fc1/15 is down (Error disabled - bit error rate too high)
2014 Jun 29 22:17:16 NGCORPSAN1 %PORT-5-IF_UP: %$VSAN 2%$ Interface fc1/15 is up in mode F
2014 Jun 29 22:18:01 NGCORPSAN1 %MODULE-4-MOD_WARNING: Module 1 (Serial number: JAF1812ALBB) reported warning fc1/15due to MAC Bit error exceeded threshold in device DEV_SABRE_FCP (device error 0xc7f00503)
2014 Jun 29 22:18:01 NGCORPSAN1 %PORT-5-IF_DOWN_BIT_ERR_RT_THRES_EXCEEDED: %$VSAN 2%$ Interface fc1/15 is down (Error disabled - bit error rate too high)
2014 Jun 29 22:19:16 NGCORPSAN1 %PORT-5-IF_DOWN_ADMIN_DOWN: %$VSAN 2%$ Interface fc1/15 is down (Administratively down)
2014 Jun 29 22:19:17 NGCORPSAN1 %PORT-5-IF_DOWN_BIT_ERR_RT_THRES_EXCEEDED: %$VSAN 2%$ Interface fc1/15 is down (Error disabled - bit error rate too high)

Please help me with the cause.

 

Regards,

Ninad Thakare

2 REPLIES
VIP Red

I think something very odd is

I think something very odd is wrong here.

Are you sure, that your storage port is a N port, and not loop port ?

what is the output of "show port internal event-history interface fc1/15 "

http://www.cisco.com/en/US/products/ps5989/prod_troubleshooting_guide_chapter09186a008067a2bb.html#wp38672

 

New Member

 Hi,Got the cause. The other

 

Hi,

Got the cause. The other end SFP was faulty.

Thanks,

 

Brgds,

Ninad

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