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Cisco Bug: CSCur29758 - FCS errors on switch's FFP port (commit CPLD version 2.4.0)

Last Modified

Feb 05, 2017

Products (1)

  • Cisco 4000 Series Integrated Services Routers

Known Affected Releases


Description (partial)

A small number of small packets are dropped in the backplane switch (on the FFP port).
"show platform hardware backplaneswitch-manager r0 ffp statistics" shows a non-zero Rx FCS counter.

This happens occasionally on some ISR4300 routers while small packets (64-98 bytes) are flowing in an egress direction toward module interfaces (NIM or SM).
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