1. Dale Carder
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Dale Carder

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  • September 23, 2022 at 10:02 am in reply to: Packets with bad checksum being dropped. #3156
    Dale Carder
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      Note that in IPv6, there is no IP header checksum!  😉

      And of course in IP there is no data checksum, that’s traditionally left to layer 4.

      September 23, 2022 at 9:46 am in reply to: Packets with bad checksum being dropped. #3154
      Dale Carder
      Participant

        Some switches based on a cut-through architecture (currently, I think these are somewhat rare vs store and forward architecture?) do pass some frames with errors.  On those architectures typically only the first 100-ish bytes are read and the packet is already being sent out the egress port before it’s been completely read in.  As such there isn’t time to evaluate the FCS and discard the frame as it’s already been sent.

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      FABRIC invites nominations for four awards recognizing innovative uses of FABRIC resources—Best Published Paper, Best FABRIC Matrix, Best FABRIC Experiment, and Best Classroom Use of FABRIC — submissions due by **Monday, February 24 at 11:59 PM ET**, and winners announced at KNIT10. [>>>Submit Form](https://docs.google.com/forms/d/e/1FAIpQLSeTp3i2iDhB7bHgN8ryMxZci8ya87yjeQd7_JMZImUodNinVA/viewform)

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      FABRIC invites nominations for four awards recognizing innovative uses of FABRIC resources—Best Published Paper, Best FABRIC Matrix, Best FABRIC Experiment, and Best Classroom Use of FABRIC — submissions due by **Monday, February 24 at 11:59 PM ET**, and winners announced at KNIT10. [>>>Submit Form](https://docs.google.com/forms/d/e/1FAIpQLSeTp3i2iDhB7bHgN8ryMxZci8ya87yjeQd7_JMZImUodNinVA/viewform)

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