--Apple-Mail=_7C933544-4635-4400-B1DC-F80968D9C397 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=iso-8859-1
Le 8 ao=FBt 2017 =E0 14:53, Moacir Ferreira = <moacirferreira@hotmail.com> a =E9crit : =20 But if you receive a 9000 MTU frame on an "input" interface that = results sending it out on an interface of a 1500 MTU, then if you set DF = bit the frame will just be dropped by the router.
The frame will be dropped and the router will send an ICMP message = "packet to big" to the sender, it's network stack will received that, = learn that the PMTU is lower and try with smaller fragment, see = https://en.wikipedia.org/wiki/Path_MTU_Discovery. --Apple-Mail=_7C933544-4635-4400-B1DC-F80968D9C397 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=iso-8859-1 <html><head><meta http-equiv=3D"Content-Type" content=3D"text/html = charset=3Diso-8859-1"></head><body style=3D"word-wrap: break-word; = -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" = class=3D""><br class=3D""><div><blockquote type=3D"cite" class=3D""><div = class=3D"">Le 8 ao=FBt 2017 =E0 14:53, Moacir Ferreira <<a = href=3D"mailto:moacirferreira@hotmail.com" = class=3D"">moacirferreira@hotmail.com</a>> a =E9crit :</div><br = class=3D"Apple-interchange-newline"><div class=3D""><div = id=3D"divtagdefaultwrapper" dir=3D"ltr" style=3D"font-style: normal; = font-variant-caps: normal; font-weight: normal; letter-spacing: normal; = orphans: auto; text-align: start; text-indent: 0px; text-transform: = none; white-space: normal; widows: auto; word-spacing: 0px; = -webkit-text-stroke-width: 0px; font-size: 12pt; font-family: Calibri, = Helvetica, sans-serif;" class=3D""><div style=3D"margin-top: 0px; = margin-bottom: 0px;" class=3D"">But if you receive a 9000 MTU frame on = an "input" interface that results sending it out on an interface of = a 1500 MTU, then if you set DF bit the frame will just be dropped by the = router.</div></div></div></blockquote><br class=3D""></div>The frame = will be dropped and the router will send an ICMP message "packet to big" = to the sender, it's network stack will received that, learn that the = PMTU is lower and try with smaller fragment, see <a = href=3D"https://en.wikipedia.org/wiki/Path_MTU_Discovery" = class=3D"">https://en.wikipedia.org/wiki/Path_MTU_Discovery</a>.<div = class=3D""><br class=3D""></div></body></html>= --Apple-Mail=_7C933544-4635-4400-B1DC-F80968D9C397--