From owner-IPv6-jp@jp.FreeBSD.org Fri Apr 12 18:01:00 2002
Received: (from daemon@localhost)
	by castle.jp.FreeBSD.org (8.11.6+3.4W/8.11.3) id g3C910174013;
	Fri, 12 Apr 2002 18:01:00 +0900 (JST)
	(envelope-from owner-IPv6-jp@jp.FreeBSD.org)
Received: from ocean.jinmei.org ([3ffe:501:100f:1041::6])
	by castle.jp.FreeBSD.org (8.11.6+3.4W/8.11.3) with ESMTP/inet6 id g3C90vv74001
	for <IPv6-jp@jp.FreeBSD.org>; Fri, 12 Apr 2002 18:00:57 +0900 (JST)
	(envelope-from jinmei@isl.rdc.toshiba.co.jp)
Received: from localhost (localhost [127.0.0.1])
	by ocean.jinmei.org (8.11.6/8.11.6) with ESMTP id g3C90mT02012
	for <IPv6-jp@jp.FreeBSD.org>; Fri, 12 Apr 2002 18:00:49 +0900 (JST)
	(envelope-from jinmei@isl.rdc.toshiba.co.jp)
Date: Fri, 12 Apr 2002 18:00:47 +0900 (JST)
Message-Id: <20020412.180047.59465438.jinmei@ocean.jinmei.org>
From: JINMEI Tatuya / =?iso-2022-jp?B?GyRCP0BMQEMjOkgbKEI=?=
 <jinmei@isl.rdc.toshiba.co.jp>
To: IPv6-jp@jp.FreeBSD.org
In-Reply-To: <200204120209.LAA14712@mosel.vrl.mei.co.jp>
References: <y7vlmbuux19.wl@ocean.jinmei.org>
	 <200204120209.LAA14712@mosel.vrl.mei.co.jp>
User-Agent: Wanderlust/2.6.1 (Upside Down) Emacs/21.1 Mule/5.0 (SAKAKI)
Organization: Research & Development Center, Toshiba Corp., Kawasaki, Japan.
Reply-To: IPv6-jp@jp.FreeBSD.org
Precedence: list
X-Distribute: distribute version 2.1 (Alpha) patchlevel 24e+020409
X-Sequence: IPv6-jp 1038
Subject: [IPv6-jp 1038] Re: Path MTU discovery
Errors-To: owner-IPv6-jp@jp.FreeBSD.org
Sender: owner-IPv6-jp@jp.FreeBSD.org
X-Originator: jinmei@isl.rdc.toshiba.co.jp

--text follows this line--
>>>>> On Fri, 12 Apr 2002 11:09:55 +0900 (JST), 
>>>>> Mitani Hiroshi <hmitani@vrl.mei.co.jp> said:
 
>> > a. MTU =?iso-2022-jp?B?GyRCJHIbKEI=?= 800
 =?iso-2022-jp?B?GyRCJEtAX0RqJDckPyRIJC0hIiVrITwlPxsoQg==?=
 =?iso-2022-jp?B?GyRCJE41c0YwJE8kSSQmJCIkayRZJC0kKxsoQj8=?=
X-Mailer: Mew version 2.1 on Emacs 21.1 / Mule 5.0 (SAKAKI)
Mime-Version: 1.0
Content-Type: Text/Plain; charset=iso-2022-jp
Content-Transfer-Encoding: 7bit

> $B;d$O(B Linux $B$O6l<j(B:-)$B$J$N$G!"NI$/CN$j$^$;$s$,!"(BLinux $B$G$O!"(Binterface 
> MTU $B$r(B1280$B0J2<$K@_Dj$9$k$H!"(Bifconfig $B%3%^%s%I$GI=<($5$l$k(B inet6 $B%"%I(B
> $B%l%9$,>C$($k$=$&$G$9(B($BEvA3(B Linux $B$N$3$H$G$9$+$i!">C$($?$+$i$H8@$C$F!"(B
> $B$=$N%$%s%?!<%U%'!<%9$,(B IPv6 $BE*$J5!G=$r40A4$KDd;_$7$?$+$I$&$+$O$o$+$j(B
> $B$^$;$s$,(B)$B!#3N$+$K!"$=$l$O$=$l$G0l$D$N9M$($H$7$FM}2r$G$-$^$9!#(B

$B$3$3$K$O$$$m$$$m$JOC$,:.$6$C$F$$$k$N$G@0M}$7$K$/$$$G$9$,!"$^$:!"!V$=$N(B
$B%$%s%?%U%'!<%9$,(BIPv6$BE*$J5!G=$r40A4$KDd;_!W$9$k$H$O$I$3$^$G$r;X$9$N$G$7$g(B
$B$&$+!#(B

$B!V$=$N%$%s%?%U%'!<%9$rDL$7$F(BIPv6$B$N%Q%1%C%H$rAw<u?.$7$J$$$h$&$K$9$k!W$O(B
$B4^$^$l$F$$$k$H9M$($F$h$5$=$&$G$9$,!"$?$H$($P!"(B

1. $B$=$N%$%s%?%U%'!<%9>e$K3d$jEv$F$i$l$?%"%I%l%908%Q%1%C%H(B($B$G!"!VDd;_!W(B
  $B$7$?$N$H$O0c$&%$%s%?%U%'!<%9$+$iF~$C$F$-$?$b$N(B)$B$r<uM}$9$Y$-$+$I$&$+(B
2.$B!VDd;_!W$7$?%$%s%?%U%'!<%9>e$K3d$jEv$F$i$l$?%"%I%l%9$r<+J,$,=P$9%Q%1%C(B
  $B%H$N%=!<%9%"%I%l%9$K;H$C$F$b$h$$$+(B

$B$"$?$j$OHyL/$@$H;W$$$^$9!#<B:]!"$$$o$f$k(Bweak host model$B$r:NMQ$7$F$$$k(B
$B%N!<%I(B(BSD$B!"$H$/$K(BIPv6$B$OIaDL$3$l$KB0$9$k(B)$B$G$"$l$P!"(B1.$B$O<uM}$9$Y$-!"(B2.
$B$O;H$C$F$b$h$$(B($B$^$?$O;H$($k$Y$-(B)$B!"$,@52r$@$HKM$O;W$$$^$9!#(B

$BKM$b(BLinux$B$N$3$H$O$[$H$s$ICN$j$^$;$s$,!"6a$/$K$$$k(BLinux$BDL$N?M$KJ9$$$?$H(B
$B$3$m$G$O!">/$J$/$H$b(BIPv6$BE*$K$O(Bweak host model$B$r:NMQ$7$F$$$k$h$&$G$9!#(B
$B$@$+$i!"$b$7(Bifconfig$B$GI=<($5$l$k%"%I%l%9$,>C$($k$H$$$&$3$H$,!"$=$N%"%I(B
$B%l%908$N%Q%1%C%H$r<u$1<h$l$J$/$J$k$3$H$r0UL#$7$F$$$k$N$@$H$7$?$i!"$3$l(B
$B$O@09g@-$N<h$l$F$$$J$$5sF0$G$7$g$&!#(B

$B<!$K!"!V(BIPv6$BE*$J5!G=$r40A4$KDd;_!W$N0UL#$,0l1~L@3N$K$J$C$?$H$7$F!"$"$k(B
$B%$%s%?%U%'!<%9$N(BMTU$B$r(BIPv6 minimum link MTU$B$h$j$b>.$5$/$7$?>l9g$K$=$N%$(B
$B%s%?%U%'!<%9>e$G(BIPv6$BE*$J5!G=$r40A4$KDd;_$9$Y$-$+!"$H$$$&$3$H$,LdBj$K$J(B
$B$j$^$9!#(B

$B$3$NJU$j$O%[%9%H$H%k!<%?$G$b;v>p$,0c$&$h$&$K$b;W$$$^$9!#%k!<%?$H$7$F?6(B
$B$kIq$&>l9g$K$O!"!V40A4$KDd;_$9$Y$-!W$,@5$7$$$+$b$7$l$^$;$s!#(B

> $B$=$l$KHf$Y$k$H!"(BFreeBSD-4.5 $B$N5sF0$O>/$7A4BNE*$K@09g@-$,$H$l$F$$$J$$(B
> $B$h$&$K46$8$i$l$^$9!#(B

$B$I$N$h$&$J0UL#$G@09g@-$,<h$l$F$$$J$$$H$*46$8$K$J$C$?$N$+$O$h$/$o$+$j$^(B
$B$;$s$,(B(b$B$NLdBj$G$7$g$&$+!)(B)$B!"%$%s%?%U%'!<%9$N(BMTU $B$r(BIPv6 minimum link
MTU$B$h$j>.$5$/$7$?$H$-$K$I$&$"$k$Y$-$+$N9M;!$r$"$^$j$7$F$$$J$$$H$$$&0U(B
$BL#$G$O$4;XE&$NDL$j$+$H;W$$$^$9!#(B

>> > b. 1500 $B$KLa$7$?8e!"(Bping6 $B$ODL$k$,!"(Budp $B$O>C<:$9$k$N$O$J$<$+(B?

> interface MTU $B$H(B IPv6$BE*(B MTU $B$rFHN)$K4IM}$9$k$J$K$+$NI,A3@-$,$"$k$N$G(B
> $B$7$g$&!#$7$+$7!"FCJL$J(Bpolicy $B$r@_Dj$7$F$$$k$o$1$G$b$J$$$N$K!"(BICMP $B$,(B
> $BN.$l$k$N$K!"(BUDP/IP $B$,N.$l$J$$$H$$$&$N$O!"$"$^$j9gM}E*$H$O;W$($^$;$s!#(B

> $BNc$($P!"(B

> a. UDP/IP $B$,DL$i$J$$$J$i!"(BICMP $B$bDL$i$J$$!#(B

> $B$3$l$J$i!"LdBj$,$I$3$GH/@8$7$F$$$k$N$+$9$0$KH=$j$^$9!#(B

$B$9$_$^$;$s!"!V(B(udp$B$O%@%a$J$N$K(B)ping6$B$,DL$k!WJ}$K$D$$$F$N@bL@$rA0$N%a!<(B
$B%k$G$O=q$-K:$l$F$$$^$7$?!#!VDL$k!W$N0UL#$,L@3N$G$J$$$N$G!"%Q%1%C%H%@%s(B
$B%W$G$b8+$J$$$H3N>Z$O;}$F$^$;$s$,!"<B:]$K$O!"(BUDP$B$b!VDL$C$F!W$O$$$k$N$G(B
$B$O$J$$$+$H;W$C$F$$$^$9!#(BBSD$B$G$O!"%Q%1%C%H$rE>Aw$9$k$H$-$K;2>H$9$k(BMTU$B$H(B
$B$7$F$O!"!V(BIPv6$BE*(BMTU$B!W$G$O$J$/%$%s%?%U%'!<%9$N(BMTU$B$rMxMQ$7$F$$$k$+$i$G$9!#(B
$B!V(BUDP$B$,DL$i$J$$!W$h$&$K8+$($k$N$O!"(BUDP$B$N>l9g$K$O(Bicmp6 error$B$rJV$=$&$H(B
$B$7$?;~E@$G<:GT$7$F!"$=$l$h$j@h$K?J$^$J$$$h$&$K8+$($k$+$i$G$O$J$$$G$7$g(B
$B$&$+!)(B

> $B$"$H!"L>A0$KOG$o$5$l$F(B ndp $B$rA4A3CN$i$J$+$C$?$N$G$9$,!"(B

>> $B$^$:!"(BBSD(KAME)$B$O(BIPv6$BE*$J(Blink MTU$B$r(Binterface$B$N(BMTU$B$H$OFHN)$K4IM}$7$F$$(B
>> $B$F!"(BIPv6$BAX$N(BMTU$B4XO"$N=hM}(B($B%U%i%0%a%s%H$9$Y$-$+!"$J$I(B)$B$K$O(BIPv6$BE*$J(BMTU$B$r(B
>> $B;2>H$7$F$$$^$9!#(B($B$b$A$m$s!"!VFHN)$K!W$H$O$$$C$F$b!"(Binterface MTU$B$+$i$/(B
>> $B$k@)8B$K$OG{$i$l$^$9!#$?$H$($P!"(Binterface MTU$B$h$jBg$-$JCM$r(BIPv6$BE*(Blink
>> MTU$B$H$7$F$O;}$F$^$;$s!#(B)$B!V(BIPv6$BE*(BMTU$B!W$O(B"ndp -i $B%$%s%?%U%'!<%9L>(B"$B$H$9$k(B
>> $B$HI=<($5$l$^$9!#(B

> $B%$%s%?!<%U%'%$%9L>$,I,MW$J$3$H$+$i$b!"(BIPv6$BE*(B MTU $B$G$"$C$F$b!"%$%s%?!<(B
> $B%U%'%$%9(B($BBgDq$N>l9g!"FCDj$N%j%s%/(B)$B$KIU$/CM$G$"$k$J$i$P!"(B ifconfig $B$K(B
> $B=8Ls$5$l$k$Y$-5!G=$G$O$J$$$G$7$g$&$+(B?

$B$J$<!V(BIPv6$BE*(BMTU$B!W$,(Bndp$B%3%^%s%I$GI=<($5$l$k$+$H$$$&$H!"(BND(neighbor
discovery)$B$N0lIt$G$"$k(BRA$B$N(BMTU$B%*%W%7%g%s$G<u$1$?CM$r0U<1$7$F$$$k$+$i$G(B
$B$9!#$=$N0UL#$G$O(Bndp$B$H$$$&%3%^%s%I$G07$o$l$F$$$F$b$*$+$7$/$O$J$$$H;W$$(B
$B$^$9!#(B

$B$?$@$7!"K\Mh$J$i(Bifconfig$B$N$h$&$J%3%^%s%I$G07$&$Y$-FbMF$r(Bndp$B$K4^$a$F$7(B
$B$^$C$F$$$kNc$,(B($B>/$J$/$H$b(BKAME snap$B$K$O(B)$B$"$k$N$b;v<B$G$9!#$3$NJU$j$b@0(B
$BM}$7$?$$$H$O;W$C$F$$$k$N$G$9$,!"(Bifconfig$B$O(B4$B$D$N(BBSD$B$GA4It0c$C$F$$$k$H$$(B
$B$&$3$H$b$"$C$F!"$J$+$J$+<j$r$D$1$i$l$F$$$^$;$s!#(B

				$B?@L@(B $BC#:H(B (jinmei@isl.rdc.toshiba.co.jp)
				$B3t<02q<R(B $BEl<G(B  $B8&5f3+H/%;%s%?!<(B
				$BDL?.%W%i%C%H%[!<%`%i%\%i%H%j!<(B
