To view the optical signal strength of an IBM B24 switch, follow these steps: 1. run porterrshow to check the port status, and then 'statsclear 'and 'slotstatsclear' 2. view: porterrshow. Check the port status www.2cto.com 3. collect supportshow, supportsave 4. to view sfpshow-all, you can check the RX Power status of the second row on the 23th port. If it is large, it will be normal for www.2cto.com sfpshow-all: ============== Port 0 :================ Identifier: 3 SFPConnector: 7 LCTransceiver: 540c402000000000 200,400,800 _ MB/s M5, M6 sw Inter_distEncoding: 1 8B10BBaud Rate: 85 (units 100 megabaud) Length 9u: 0 (units km) Length 9u: 0 (units 100 meters) length 50u: 5 (units 10 meters) Length 62.5u: 3 (units 10 meters) Length Cu: 0 (units 1 meter) Vendor Name: BROCADE Vendor OUI: 00: 05: 1 eVendor PN: 57-1000012-01 Vendor Rev: A Wavelength: 850 (units nm) Options: 001a Loss_of_Sig, Tx_Fault, Tx_DisableBR Max: 0 BR Min: 0 Serial No: uaa210473104682 Date Code: 101127 DD Type: 0x68Enh Options: 0xf0Status/Ctrl: 0x92Alarm flags [0, 1] = 0x0, 0x0Warn Flags [0, 1] = 0x0, 0x40 Alarm Warn low high low highTemperature: 34 Centigrade-15 100-10 95 Current: 7.112 mAmps 2.000 8.500 2.000 8.500 Voltage: 3286.1 mVolts 2800.0 3800.0 2970.0 RX Power: -7.2 dBm (190.9 uW) 0.0 uW 6550.0 uW 49.0 uW 1100.0 uWTX Power:-2.3 dBm (588.7 uW) 50.0 uW 800.0 uW 100.0 uW 700.0 uW5. if it is still small, it turns out: -16.3 dBm (23.2 uW): replace the optical fiber cable and repeat the preceding steps.