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Altera_Forum's avatar
Altera_Forum
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17 years ago

CRC of jumbo frames

does any body know how is the CRC of jumbo frames (in Gigabit Ethernet)of size greater than 9K is found? What algorithm is used for that?

2 Replies

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    17 years ago

    Why do you assume there is any difference to the commonly used CRC32 for Ethernet?

    Accoring to Ethernet Spec the FCS is the same. What you have to keep in mind though is, that in case you are using half duplex with frame bursting, the FCS is followed by extension bits during the interframe gap, then the next frame begins. Hope that helps.

    Lokla
  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    17 years ago

    Thank you for ur reply.

    But i asked this question becouse when frame size is above 9K,CRC32 will loose its effectiveness. then how can we use that?