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Brocade FC port offline with No_Sync state due to faulty switch SFP

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Category:
fabric-interconnect-and-management-switches
Specialty:
brocade
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Applies to

  • Brocade FC switch
  • Fabric OS (FOS) 

Issue

  • Brocade FC port is in No_Sync state and disabled state as per switchshow output

/fabos/bin/switchshow :
Index Slot Port Address Media  Speed        State    Proto
============================================================
 106   11   10   676a40   id    N32   No_Sync     FC  Disabled

  • Brocade FC port is in No_sync and port state change threshold exceeded

/fabos/bin/switchshow :
Index Slot  Port  Address Media      Speed        State    Proto  
=================================================================
9   15   0b4f40   id    N32       No_Sync       FC       Disabled (Port State Change threshold exceeded)

  • sfpshow displays that Tx value is not in recommended range

=============
Slot 11/Port 10:
=============
Transceiver: 6804404000000000 8,16,32_Gbps M5 sw Short_dist
Vendor PN:   57-1000333-01
RX Power:    -2.2    dBm (604.6uW)
TX Power:    -27.2   dBm (1.9   uW)

Note: Disabled port and TX power is -40 indicates the laser is turned off and does not indicate a fault necessarily.

  • Enabling the port confirms TX power stays < 300 uW

  • Brocade FC port is in No_Sync state as per switchshow output

/fabos/bin/switchshow :
Index Slot Port Address Media  Speed        State    Proto
============================================================
127   12   15   107f40   id    N32        No_Sync     FC

  • Porterrshow reports lot of media errors including pcs error, uncorr errors, c3 discards, along with link fail and loss_sig errors.

/fabos/cliexec/porterrshow :
          frames        enc     crc     crc     too     too     bad     enc    disc    link    loss    loss    frjt    fbsy     c3timeout     pcs      uncor
        tx       rx      in     err     g_eof   shrt    long    eof     out    c3      fail    sync    sig                      tx      rx      err     err
  296:   12.4k   12.1k    0       0       0       0       0       0       0      11       1.5k    57.3k       9.2k    0       0      11       0     252      43.7k
 

  • portstatsshow output shows port is offline & no_sync state along with disable reason as port throttled.

portshow 127
portDisableReason: Port Throttled
portCFlags: 0x0
portFlags: 0x61    PRESENT DISABLED
LocalSwcFlags: 0x0
portType:  26.0
portState: 2          Offline
Protocol: FC
portPhys:  5          No_Sync              portScn:   2          Offline

  • portstatsshow output shows port is offline & no_sync state

portshow 330
portDisableReason: None
portCFlags: 0x0
portFlags: 0x4021              PRESENT U_PORT DISABLED LED
LocalSwcFlags: 0x0
portType:  26.0
portState: 2          Offline
Protocol: FC
portPhys:  5          No_Sync              portScn:   2          Offline

  • Errdump reports link failures and loss signal errors along with rule-defNON_E_F_PORTSSTATE_CHG_20_FENCE & ALL_SFP_32GSWL_TX_POWER_251 getting triggered

2023/01/20-15:37:58, [MAPS-2022], 23317, SLOT 1 | FID 128, WARNING, SWITCHXX, slot6 port8 HBAXX_HBA1 DISABLED_LR_11112022, U-Port 6/8, Condition=ALL_PORTS(LOSS_SIGNAL/min>3), Current Value:[LOSS_SIGNAL, 70 LOS], RuleName=defALL_PORTSLOSS_SIGNAL_3, Dashboard Category=Port Health.
2023/01/20-15:38:28, [MAPS-2018], 23318, SLOT 1 | FID 128, WARNING, SWITCHXX, slot6 port8 HBAXX_HBA1 DISABLED_LR_11112022, U-Port 6/8, Condition=ALL_PORTS(LF/min>3), Current Value:[LF, 4 LFs], RuleName=defALL_PORTSLF_3, Dashboard Category=Port Health.
2023/03/06-17:48:07, [MAPS-1003], 89981, SLOT 1 | FID 128, WARNING, SWITCHXX, slot9 port15, U-Port 9/15, Condition=NON_E_F_PORTS(STATE_CHG/min>11), Current Value:[STATE_CHG, 14], RuleName=defNON_E_F_PORTSSTATE_CHG_11, Dashboard Category=Port Health.
2023/03/06-17:48:13, [MAPS-1010], 89983, SLOT 1 | FID 128, ERROR, SWITCHXX, Port(s) fenced due to RuleName=defNON_E_F_PORTSSTATE_CHG_20_FENCE, Condition=NON_E_F_PORTS(STATE_CHG/min>20), Obj:slot9 port15, U-Port 9/15 [ STATE_CHG,21]
2023/06/15-18:16:27, [MAPS-1005], 182673, SLOT 1 | FID 128, WARNING, H1NETxxx, SFP 12/15, Condition=ALL_32GSWL_SFP(TXP<=251), Current Value:[TXP, 251 uW], Rule ALL_SFP_32GSWL_TX_POWER_251 triggered 57 times in 1 day and last trigger time Thu Jun 15 16:38:27 2023, Dashboard Category=Port Health.
023/06/14-17:29:26, [MAPS-1003], 182281, SLOT 1 | FID 128, WARNING, H1NETxxx, slot12 port15, F-Port 12/15, Condition=ALL_HOST_PORTS(LR/min>1), Current Value:[LR, 2 LRs], RuleName=ALL_HOST_PORTS_LR_1_ELK, Dashboard Category=Port Health.
2023/06/14-17:30:08, [MAPS-1003], 182282, SLOT 1 | FID 128, WARNING, H1NETxxx, slot12 port15, F-Port 12/15, Condition=ALL_HOST_PORTS(LR/min>4), Current Value:[LR, 5 LRs], RuleName=ALL_HOST_PORTS_LR_4, Dashboard Category=Port Health.
2023/06/14-17:30:26, [MAPS-1003], 182283, SLOT 1 | FID 128, WARNING, H1NETxxx, slot12 port15, F-Port 12/15, Condition=ALL_HOST_PORTS(LR/min>1), Current Value:[LR, 8 LRs], RuleName=ALL_HOST_PORTS_LR_1_ELK, Dashboard Category=Port Health.              
2023/06/14-09:27:56 (IST), [MAPS-1003], 915764, SLOT 1 | FID 128 | PORT 9/42, WARNING, Brocade, slot9 port42-H.DELL_Chassis.xx.10.226.xx.xx.3F07xxx.SI, U-Port 9/42, Condition=ALL_OTHER_F_PORTS(STATE_CHG/min>5), Current Value:[STATE_CHG, 9], RuleName=defALL_OTHER_F_PORTSSTATE_CHG_5, Dashboard Category=Port Health, Quiet Time=None.
2023/06/14-09:27:56 (IST), [MAPS-1003], 915763, SLOT 1 | FID 128 | PORT 9/42, WARNING, Brocade, slot9 port42-H.DELL_Chassis.xx.10.226.xx.xx.3F07xx1.SI, U-Port 9/42, Condition=ALL_HOST_PORTS(STATE_CHG/min>5), Current Value:[STATE_CHG, 9],
RuleName= defALL_HOST_PORTSSTATE_CHG_5, Dashboard Category=Port Health, Quiet Time=None.

  • sfpshow reports low Rx power and Tx power as -inf:

=============
Slot  6/Port  8:
=============
RX Power:    -5.5    dBm (284.6uW)
TX Power:    -inf    dBm (0.0   uW)

  • sfpshow reports Tx power as -inf:

=============
Slot  9/Port 15:
=============
RX Power:    -1.2    dBm (751.4uW)
TX Power:    -inf    dBm (0.0   uW)

  • sfpshow reports low Tx power:

=============
Slot 12/Port 15:
=============
RX Power:    -2.5    dBm (556.0uW)
TX Power:    -8.4    dBm (144.1 uW)

  • Fabriclog reports link flapping as shown below:

17:47:01.645590 *Removing all nodes from port               A2,P0  A2,P0  79    NA
17:47:01.645838 SCN Port F_PORT                             A2,P1  A2,P0  79    NA
17:47:01.646695 SCN Port Offline;rsn=0x3,g=0x66c            A2,P0  A2,P0  79    NA
17:47:01.646703 *Removing all nodes from port               A2,P0  A2,P0  79    NA
17:47:02.439648 SCN LR_PORT(0);g=0x66c                      A2,P0  A2,P0  79    NA
17:47:03.316504 SCN LR_PORT(0);g=0x66c                      A2,P0  A2,P0  79    NA
17:47:03.366059 SCN Port Online; g=0x66c,isolated=0         A2,P0  A2,P1  79    NA

 

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