Operational Defect Database
BugZero found this defect 2278 days ago.
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Hewlett Packard Enterprise | a00042333en_us
Advisory: HPE StoreFabric C-series 16 Gb Fibre Channel LW SFP+ Transceiver - Invalid Power Warning Message Reported on Affected Transceivers
Last update date:
2/28/2024
Affected products:
HPE C-series SN6500C Multiservice Switch
HPE Storage Fibre Channel Switch C-series SN6010C
HPE C-series Switch Expansion Upgrades
Affected releases:
No affected releases provided.
Fixed releases:
No fixed releases provided.
Description:
Info
HPE C-series 16Gb FC LW SFP+ Transceivers may trigger invalid transmit (Tx) or receive (Rx) High Power Warnings due to incorrect Tx and Rx High Power Warning threshold values set during manufacturing. A transceiver Tx or Rx High Power Warning message is incorrectly produced when Tx or Rx power exceeds 0.50 dBm on affected transceivers. The correct High Power Warning threshold values for Tx and Rx should be 2.00 dBm.
Scope
This issue affects HPE C-series 16Gb FC LW SFP+ transceivers (Cisco PID: DS-SFP-FC16G-LW, HPE PN: C8S73A) with Date Codes 0000 to 2125. The Date Code is encoded in the transceiver serial number in character positions 4 through 7 (for example, serial number AVD2044N0NS has a date code of 2044). This issue is resolved in transceivers that were manufactured with Date Codes 2126 and later.
Resolution
If a High Tx or Rx Power Warning is encountered, Verify the date code of the affected transceiver If the date code is 2126 or later, the Power Warning is valid (>2.00 dBm). If the date code is 2125 or earlier, proceed to Step 2. Verify the actual Tx or Rx power levels from the console output. If the actual Tx or Rx power levels are >/= 2.00 dBm, the High Power Warning is valid (>2 dBm). If the actual Tx or Rx power levels are < 2.00 dBm, the High Power Warning is invalid and can be safely ignored. Replacement of affected HPE C-series 16Gb Fibre Channel Longwave optical transceivers is necessary only if the Tx orRx power level displayed in the console output is >/= 2.00 dBm. Example console and syslog messages with invalid High Tx and Rx Power Warning: Serial number is AVD2044N0NS. Cisco part number is 10-2673-01. Cisco pid is DS-SFP-FC16G-LW. No tx fault, no rx loss, in sync state. SFP Diagnostics Information: Note: ++ high-alarm; + high-warning; -- low-alarm; - low-warning 2017 May 3 14:26:08.372 JD97SN18-L3 %PORT-4-IF_SFP_WARNING: Interface fc9/37, High Rx Power Warning port-channel122 2017 May 3 14:36:08.484 JD97SN18-L3 %PORT-4-IF_SFP_WARNING: Interface fc9/37, High Tx Power Warning port-channel122High Tx Power Warning port-channel122In the sample console output above, the transceiver has incorrect Tx and Rx High Power Warning thresholds (0.50 dBm) because it has a date code less than or equal to 2125. The actual Tx and Rx power levels can be seen on the "Tx Power" and "Rx Power" rows above, in the first column; Tx Power = 0.55 dBm and Rx Power = 0.62 dBm. Both Tx and Rx power values are <2.00 dBm and High Power Warnings can be safely ignored. Additional information about this issue can be found in Cisco Field Notice: FN - 70025 - MDS9K - DS-SFP-FC16G-LW - High Power Warnings - Workaround Provided NOTE: Products sold prior to the November 1, 2015 separation of Hewlett-Packard Company into Hewlett Packard Enterprise Company and HP Inc. may have older product names and model numbers that differ from current models. RECEIVE PROACTIVE UPDATES : Receive support alerts (such as Customer Advisories), as well as updates on drivers, software, firmware, and customer replaceable components, proactively in your e-mail through HPE Subscriber's Choice. Sign up for Subscriber's Choice at the following URL: Proactive Updates Subscription Form.
