Brocade FC port offline with No_Sync state due to loose/faulty cable
Applies to
- Brocade FC Switch
- Fabric OS (FOS)
Issue
-
Brocade fiber channel port is in
No_sync,Disabledstate underswitchshowoutput:
/fabos/bin/switchshow :
Index Slot Port Address Media Speed State Proto
============================================================
228 11 20 6be400 id N32 No_Sync FC Disabled (Port Throttled)
-
Porterrshow reports link fail and loss_sync 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
228: 10.5g 16.2g 0 0 0 0 0 0 0 0 14 15 0 0 0 0 0 0 0
- sfpshow reports low Rx power :
=============
Slot 4/Port 24:
=============
RX Power: -20.2 dBm (9.6 uW)
TX Power: -0.6 dBm (879.9 uW)
- Fabriclog output reported link failures:
Switch 0; Sun Jan 29 12:04:25 2023 IST (GMT+5:30) 12:04:25.839042 SCN Port Offline;rsn=0x3,g=0xc44 D2,P0 D2,P0 228 NA 12:04:25.839049 *Removing all nodes from port D2,P0 D2,P0 228 NA 22:21:42.632387 SCN LR_PORT(0);g=0xc44 D2,P0 D2,P0 228 NA 22:21:42.666236 SCN Port Online; g=0xc44,isolated=0 D2,P0 D2,P1 228 NA 22:21:42.666376 Port Elp engaged D2,P1 D2,P0 228 NA 22:21:42.666389 *Removing all nodes from port D2,P0 D2,P0 228 NA 22:21:42.666643 SCN Port F_PORT D2,P1 D2,P0 228 NA 22:27:49.180108 SCN Port Offline;rsn=0x10004,g=0xc46 D2,P0 D2,P0 228 NA 22:27:49.180115 *Removing all nodes from port D2,P0 D2,P0 228 NA 22:29:29.082525 SCN LR_PORT(0);g=0xc46 D2,P0 D2,P0 228 NA 22:29:29.114287 SCN Port Online; g=0xc46,isolated=0 D2,P0 D2,P1 228 NA 22:29:29.114347 Port Elp engaged D2,P1 D2,P0 228 NA 22:29:29.114358 *Removing all nodes from port D2,P0 D2,P0 228 NA 22:29:29.114583 SCN Port F_PORT D2,P1 D2,P0 228 NA
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Verify if the switch end sfp Tx and Rx power are within the recommended range.
-
Low Rx power indicates an issue upstream to the switch, faulty hardware, including cable and end device sfp.