Known Issues
The following sections describe known issues in firmware releases and possible workarounds.
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Internal Ref. |
Issue |
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2355994 |
Description: In AOCs MFS1S00-H0xx-LL and splitter cables MFS1S50-H0xxE-LL , effective BER of 1e-12 in EDR speed may be observed. |
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Workaround: N/A |
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Keywords: Cables, BER |
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Discovered in Version: 27.2008.2102 |
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2127531 |
Description: When using H-cable MFS1S90 with HDR speed in split mode, the link, on rare occasion, goes down. |
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Workaround: N/A |
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Keywords: Cables, Link |
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Discovered in Version: 27.2008.1300 |
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2223568 |
Description: When using active copper cables, link down counter may be observed on occasion. |
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Workaround: N/A |
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Keywords: Active Copper Cables |
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Discovered in Version: 27.2008.0232 |
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2109975 |
Description: Occasionally, EDR linkup time might take up to 1 minute when using Amphenol 100G (EDR) optical cables. |
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Workaround: N/A |
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Keywords: Cables, EDR |
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Discovered in Version: 27.2008.0232 |
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2239632 |
Description: EDR linkup time might take up to 50sec when using HDR optical cable. |
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Workaround: N/A |
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Keywords: Cables, EDR |
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Discovered in Version: 27.2008.0232 |
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2145881 |
Description: Occasionally, when using Active Fiber Splitter cables (OPNs: MFS1S90-Hxxx), unclean RAW BER (10e-6) might be seen. |
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Workaround: N/A |
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Keywords: Cables, BER |
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Discovered in Version: 27.2008.0232 |
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2145881 |
Description: FDR link is unstable when using an FDR cable in ports: #27-#34. |
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Workaround: N/A |
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Keywords: FDR, cables |
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Discovered in Version: 27.2008.0232 |
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2057793 |
Description: Congestion profiles in VS-MAD PortProfileSetting support only fixed mode. Percentage mode is not supported. |
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Workaround: N/A |
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Keywords: DCQCN Congestion Control |
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Discovered in Version: 27.2007.0300 |
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1959529 |
Description: When HDR Active Copper cables are used between Quantum switches, or between Quantum switch and ConnectX-6 HCA, the counter indicating ‘Link Down’ may have a value other than zero, after the first time the cable is connected. As this may happened only at the first time, it is recommend to clear the counters after the cluster is brought up. |
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Workaround: N/A |
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Keywords: Cables |
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Discovered in Version: 27.2000.3276 |
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1856717 |
Description: High BER may occur when connecting cables of type 0.5/1m DAC to an HDR speed. |
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Workaround: N/A |
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Keywords: Cables |
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Discovered in Version: 27.2000.1886 |
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- |
Description: The supported length of HDR copper cables is currently up to 2M. |
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Workaround: N/A |
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Keywords: HDR cables |
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- |
Description: Although the effective BER (after FEC) is expected to meet our design targets (e.g. 10e-14 or lower), occasionally it may be higher. |
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Workaround: N/A |
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Keywords: Cables |
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- |
Description: The following features are currently not supported on Quantum-based systems:
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Workaround: N/A |
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Keywords: Quantum |
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955641 |
Description: VL_HIGH_LIMIT is not affecting the VL arbiter as expected. |
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Workaround: Arbitration table should be set using only the low priority VL arbitration table. |
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Keywords: VL Arbitration |
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1249608 |
Description: Configuring weight "0" for VL, results in unexpected behavior. |
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Workaround: Arbitration table should be configured with weights other than "0". |
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Keywords: VL Arbitration |
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- |
Description: Module info page in Diagnostics Data VS-MAD is not supported |
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Workaround: N/A |
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Keywords: Diagnostics Data VS-MAD |