North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: Thoughts on increasing MTUs on the internet
On Apr 13, 2007, at 4:55 PM, Fred Baker wrote: The biggest value in real practice is IMHO that the end systems deal with a lower interrupt rate when moving the same amount of data. That said, some who are asking about larger MTUs are asking for values so large that CRC schemes lose their value in error detection, and they find themselves looking at higher layer FEC technologies to make up for the issue. Given that there is an equipment cost related to larger MTUs, I believe that there is such a thing as an MTU that is impractical. Keep in mind that a 9KB MTU still reduces the Ethernet CRC effectiveness by a fair amount. Adoption of CRC32c by SCTP and iSCSI has a larger Hamming distance restoring the detection rates for Jumbo packets. -Doug
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