Hideki Yamamoto <hyam...@gmail.com> wrote in <90dbee150912261333l602c4161nccaf1995dc836...@mail.gmail.com>:
hy> Hi, hy> hy> I often use FreeBSD for developing the gateway. For example, I use gif for the hy> tunnel protocol when using IPv6 over IPv4 and use an application for changing hy> packet address for special purpose. When we were using old FreeBSD, such as hy> FreeBSD 4.11, the MTU of the tunnel packets or forwarded packets hy> was not limited into 1280. However, FreeBSD 6,7, and 8 fragments packets hy> by 1280 when using tunnel. The gif(4) interface supports MTU up to 8192 and this has not been changed since FreeBSD 4.X IIRC. Why did you think FreeBSD 6 and later supported a fixed MTU only? -- Hiroki
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