FCP target adapter showing LINK DISCONNECTED due to faulty SFP on switch side

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Category:: ontap-9

Specialty:: san

Last Updated:

Applies to

ONTAP 9
FCP
Brocade and Cisco SAN switches

Issue

Event log entry indicates an FC link is disconnected:

5/23/2020 21:11:31 cluster-node1 ERROR scsitarget.ispfct.linkBreak: Link break detected on Fibre Channel target adapter 1b. Firmware status code status1 0x2, status2 0x7, and status4 0x0.

sysconfg -a reports the port status as "Link Disconnected"

slot 1: Fibre Channel Target Host Adapter 1b (QLogic 8324 (8362) rev. 2, <LINK DISCONNECTED>) Board Name: QLE2672 Serial Number: RFE2005W04482 Firmware rev: 8.9.0 Flash rev: 1.1.2 Host Port Addr: 000000 FC Nodename: xx:0a:09:80:80:xx:xy:xx (500a098080b3a125) FC Portname: xx:0a:09:82:80:xy:yy:xx (500a098280b3a125) Connection: No link Switch Port: Unknown SFP Vendor Name: FINISAR CORP. SFP Vendor P/N: FTLF8529P4BCV-QM SFP Vendor Rev: B SFP Serial No.: P2SABCS SFP Connector: LC

Rx and Tx power shows as 0.0 (uWatts) for the Fibre Channel Target Adapter under FCP-Adapter.xml log in ASUP:

Rx : 0.0 (uWatts) Tx : 0.0 (uWatts)

Rx and Tx power is optimal on either ends, storage and switch side.

port 9a Rx : 623.0 (uWatts) Tx : 1020.9 (uWatts)

Slot 9/Port 2: RX Power: -0.5 dBm (883.9uW) TX Power: -1.6 dBm (697.3 uW)

Network fcp adapter show command executed on CLI reports the operational status as "link disconnected"

cluster::> network fcp adapter show Connection Port Admin Operational Node Adapter Established Address Status Status ------------ ------- ----------- --------- ------- ----------------------- cluster-node1 0c false 0 up link not connected cluster-node1 0d false 0 up link not connected cluster-node1 1a true f0500 up online cluster-node1 1b true 0 up link disconnected cluster-node2 0c false 0 up link not connected cluster-node2 0d false 0 up link not connected cluster-node2 1a true f0600 up online cluster-node2 1b true f0600 up online

The storage HBA port is still physically connected
Below troubleshooting steps can be verified to isolate the issue:
1. Verify the remote SFP health and bounce the port using below commands:

Cisco Example:

switch# config terminal switch(config)# interface fc <slot>/<port#> switch(config)# show int fc <slot>/<port#> transceiver detail switch(config-if)# shutdown switch(config-if)# no shutdown

Brocade Example:

switch:admin> sfpshow <index # OR slot/port #> switch:admin> portdisable <index # OR slot/port #> switch:admin> portenable <index # OR slot/port #>

Perform physical inspection and re-seat link and patch panel components.
Repeat port bounce process after re-seat.
Replace/Swap components including cable and sfp on either ends.