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Re: Ethernet NAPs (was Re: Miami ...)
On Thu, 23 Aug 2001, John Kristoff wrote: > > Mikael Abrahamsson wrote: > > If NAPs do not support jumbos, then end systems will never support them. > > Many end systems will never support jumbo frames, period. There are > lots of 10/100 Mb/s ethernet hosts that will not ever be upgraded. While not a standard feature, many 100mbit nics support jumbo on full-duplex links and some 100tx switches do as well. > Certainly. In a nutshell, it might be best to take steps to avoid > fragmentation elsewhere in the network. Perhaps a rule of thumb that > should be stressed is to use jumbo frames if you know for sure the other > end system(s) support it, otherwise default to 1500. Path MTU discovery works fine. (except for broken firewalls) Your complaint about end systems never supporting jumbos is a moot point because if neither end supports them, then PMTU discovery isn't even an issue.