- ONTAP 9
- Small form-factor pluggable
- Cisco Switch
EMSlog reports Link flap events on Fibre Channel target adapter:
Thu May 25 01:23:26 AEST [Netapp: fct_tpd_work_thread_0: scsitarget.ispfct.linkBreak:error]: Link break detected on Fibre Channel target adapter 0e. Firmware status code status1 0x2, status2 0x7, and status4 0x0.
Thu May 25 01:30:08 AEST [Netapp: fct_tpd_work_thread_0: scsitarget.hwpfct.linkUp:notice]: Link up on Fibre Channel target adapter 0e.
- FC target port status shows as online under
slot 0: Fibre Channel Target Host Adapter 0e
(QLogic 8324 (8362) rev. 2, <ONLINE>)
Firmware rev: 8.7.0
Flash rev: 7.0.3
Host Port Addr: ae0700
FC Nodename: 50:0a:09:80:80:84:xy:xx (500a09808084179e)
FC Portname: 50:0a:09:81:80:84:yx:yy (500a09818084179e)
Connection: PTP, Fabric
Switch Port: sw:1/8
SFP Vendor Name: AVAGO
SFP Vendor P/N: AFBR-57F5MZ-NA3
SFP Vendor Rev: 01
SFP Serial No.: AC1804Jxxxx
SFP Connector: LC
SFP Capabilities: 4, 8, 16 Gbit/S
- Rx and Tx power are in the optimal range as per
- On Cisco switch connected to the affected port, switch port Tx power is showing as NA.
[2023-05-31 17:09:33] Tx Power N/A -- 1.70 dBm -13.00 dBm -1.30 dBm -9.00 dBm
[2023-05-31 17:09:33] Rx Power -2.19 dBm 3.00 dBm -15.90 dBm 0.00 dBm -11.90 dBm
- Switch port is in
error disabledstate as per
show int brieflog and
ITWerrors being generated for the switch port under
show interface counters:
show int brief-
fc1/8 is down (Error disabled - bit error rate too high)
show interface counters-
[2023-05-31 17:09:32] System Errorcode : 0x4042001e MAC Bit error exceeded threshold
[2023-05-31 17:09:32] Error Type : Warning
[2023-05-31 17:09:32] PhyPortLayer : Fibre Channel
[2023-05-31 17:09:32] Port(s) Affected : fc1/8
[2023-05-31 17:09:32] Error Description : MAC Bit error exceeded threshold [ITW]
- We could see entries of port flapping on switch port under
show logging log:
[2023-05-31 17:09:40] 2023 May 22 09:42:24 sw %PORT-5-IF_DOWN_ADMIN_DOWN: %$VSAN 10%$ Interface fc1/8 is down (Administratively down) CS1A-naclu01-02_e0e
[2023-05-31 17:09:40] 2023 May 22 09:42:27 sw %PORT-5-IF_UP: %$VSAN 10%$ Interface fc1/8 is up in mode F CS1A-naclu01-02_e0e
023 May 25 01:29:55 sw %PORT-5-IF_DOWN_ADMIN_DOWN: %$VSAN 10%$ Interface fc1/8 is down (Administratively down) xxxx
[2023-05-31 17:09:40] 2023 May 25 01:30:08 sw %PORT-5-IF_UP: %$VSAN 10%$ Interface fc1/8 is up in mode F xxxx
Below steps can be implemented to isolate the issue further:
Reseat the cable/sfp on storage and switch port.
Perform end to end cable testing including the patch panel , replace the cable if its faulty.
If cable is not faulty, replace the SFP at switch end first as Tx power is NA.
If issue persists , storage end sfp will be replaced in that case.