Path MTU discovery, UDP and Linux

Marcelo Barbosa Lima (marcelo.lima@dcc.unicamp.br)
Thu, 28 Oct 1999 20:35:27 -0200


Hi folks,

Does linux 's kernel implement Path MTU discovery in UDP packets (IPv4)? I
runned tcpdump and i saw that TCP packets usind Don't Fragment bit while
UDP packets don't use. Why? I saw that Solaris use Path MTU in UDP packets
too. FreeBSD works like linux in UDP and TCP packets. Thanks and sorry my
poor english!

Regards,

Marcelo (marcelo.lima@dcc.unicamp.br)

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