Minimum Internet MTU

Hani Mustafa hani.mustafa at
Mon Dec 22 13:57:07 UTC 2003

> by GRE or IPSec. With this in mind, would we be safe to flag/drop/what
> ever all fragments smaller than 1200 bytes that are not last fragments
> (i.e., more fragments is still set)? 

No. Check previous thread about IPSec and MTU. Some IPSec implementations split the greater-than-mtu sized packet in half in order to avoid the possibility of further fragmentation down the road, thus better performance.

~Hani Mustafa

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