“No light” state on Brocade switch ports
Applies to
Brocade Switch
Issue
- "No_light" state reported on Brocade switch port:
/fabos/bin/switchshow :
switchName: XXXXXXX
switchType: 165.0
switchState: Online
switchMode: Native
switchRole: Principal
Index Slot Port Address Media Speed State Proto
============================================================
130 7 2 018200 id N32 No_Light FC
131 7 3 018300 id N32 No_Light FC
- sfpshow output reports low Rx power:
=============
Slot 7/Port 2:
=============
RX Power: -inf dBm (0.0 uW)
TX Power: -0.1 dBm (981.2 uW)
=============
Slot 7/Port 3:
=============
RX Power: -inf dBm (0.0 uW)
TX Power: -0.1 dBm (985.0 uW)
sfpshowreports Tx and Rx stats as "Not Available"
Slot 11/Port 47:
=============
Identifier: 3 SFP
Connector: 7 LC
Transceiver: 6804406000000000 8,16,32_Gbps M5 sw Inter,Short_dist)
[...]
Vendor Name: BROCADE
Vendor OUI: 00:05:1e
Vendor PN: 57-1000333-01
[...]
Temperature : Not Available
Current : Not Available
Voltage : Not Available
RX Power : Not Available
TX Power : Not Available
- Below SNMP alerts are recieved:
No Light;WARN;XX8A8894718xyxyx;
| 130;7/2;OK;No Light;WARN;XX8B8894718xxxxx;
| 131;7/3;OK;No Light;WARN;XX8C8894718yyyyy;
| 142;7/13;OK;No Light;WARN;XX8D8894718xyxyx;
| 143;7/14;OK;No Light;WARN;XX8E8894718yxyxy;
- Perform a physical connectivity on the switch port to check if there is any device connected on the switch port.
- If no device is connected to the switch port, proceed to the solution.