Cisco Bug: CSCuz62750 - Incremental drops on counter DROP_FRM_CRC_ERR_SGMII0 causes traffic loss
Sep 02, 2020
- Cisco ASR 9000 Series Aggregation Services Routers
Known Affected Releases
Symptom: Partial data traffic loss can be observed. Below list counters need to focus to determine the issue:- "show controller np counters all loc <location>" could indicate FRM_FRM or CRC drop counts. 1082 DROP_FRM_CRC_ERR_SGMII0 1429516994 0 1083 DROP_FRM_FRM_ERR_SGMII0 74455703 0 1084 DROP_FRM_CRC_ERR_SGMII1 1427728248 0 1085 DROP_FRM_FRM_ERR_SGMII1 74942820 0 1086 DROP_FRM_CRC_ERR_SGMII2 1431171380 0 1087 DROP_FRM_FRM_ERR_SGMII2 75133739 0 1088 DROP_FRM_CRC_ERR_SGMII3 1436187894 0 1089 DROP_FRM_FRM_ERR_SGMII3 74761074 0 It is also theoretically possible for data corruption to happen after the CRC check, which should then be detected at the higher protocol layers. Conditions: Problem observed on operational network. Cause is SEU (single event upset) soft errors. This issue can affect (A9K-1X100GE-SE/TR, A9K-2X100GE-SE/TR), but not all cards are affected.
Bug details contain sensitive information and therefore require a Cisco.com account to be viewed.
Bug Details Include
- Full Description (including symptoms, conditions and workarounds)
- Known Fixed Releases
- Related Community Discussions
- Number of Related Support Cases