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Date: Wed, 24 Apr 2002 11:57:33 +0900
Message-ID: <y7v662hhkgy.wl@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: <200204110834.RAA14868@mosel.vrl.mei.co.jp>
References: <200204110834.RAA14868@mosel.vrl.mei.co.jp>
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Subject: [IPv6-jp 1056] Re: Path MTU discovery
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>>>>> On Thu, 11 Apr 2002 17:34:29 +0900 (JST), 
>>>>> Mitani Hiroshi <hmitani@vrl.mei.co.jp> said:

> 2)MTU $B$r(B 1500-->800-->1500 $B$HJQ2=$5$;$?>l9g(B

> MTU $B$,(B 800 $B$N>uBV$G$O!"(Bv6 $B$ODL$i$J$$$N$G$9$,!"(Bv4 $B$N%k!<%?$H$7$F$O(B
> $BF0$$$F$$$^$9!#$o$+$i$J$$$N$O!"(BMTU $B$r:F$S(B 1500 $B$KLa$7$?$H$-$G$9!#(B
> $B$3$N;~!"(Bping6 -s 1400 $B$ODL$j$^$9!#$,!"%5%$%:$,(B 1400 $B$N(B UDP $B%Q%1%C%H(B
> $B$O!"%k!<%?$rDL2a$G$-$^$;$s!#$7$+$b!"2?$N(B ICMP $B$b%k!<%?$+$i%=!<%9B&(B
> $B%[%9%H$K$OJV$C$FMh$J$$$N$G$9!#(B

>   tracepath6 $B$O:G=i$K!"(BICMP echo request $B$rEj$2$F!"FO$/$h$&$J$i!"(B
>   udp $B%Q%1%C%H$r%5%$%:$r(B 1500 $B$+$i=y!9$K>.$5$/$7$F!"Aj<j$N;H$C$F(B
>   $B$$$J$$%]!<%H$KEj$2!"(BICMP unreach $B$,JV$C$FMh$k$^$GD4$Y$^$9!#(B

$B$3$N7o$G$9$,!"(BKAME snap$B$G$O0J2<$N$h$&$KJQ99$7$^$7$?!#(B

1. IPv6$BE*(BMTU$B$O!"(Binterface MTU$B$H$OFHN)$K4IM}$9$k!#%Q%1%C%H$r=P$9$H$-$K!"(B
   $BFs$D$N$&$A$N>.$5$$J}$r<B:]$N(BMTU$B$H$7$FMxMQ$9$k!#(B
2. ifconfig mtu($B$J$I(B)$B$G(Binterface$B$N(BMTU$B$rJQ99$7$?7k2L$,(BIPv6 link minimum
   MTU$B$h$j>.$5$/$J$C$?>l9g$O!"(Bkernel$B$N(Blog message$B$r=P$9(B($B$,!"$=$NB>$N5s(B
   $BF0$OJQ$($J$$(B)$B!#(B

1.$B$K$h$j!"$?$H$($P:#2s$NNc$G%$%s%?%U%'!<%9(BMTU$B$r(B1500$B$KLa$7$?8e$K$*$+$7(B
$B$J5sF0$r<($9$3$H$O$J$/$J$k$O$:$G$9!#$3$NJQ99$NJ}8~<+BN$O@5$7$$$H;W$&$N(B
$B$G!"$$$:$l(BFreeBSD$B$K$b%^!<%8$5$l$k$3$H$K$J$k$G$7$g$&$1$l$I!"$?$V$s(B4.6$B$K(B
$B$O4V$K9g$o$J$$$H;W$$$^$9!#(B

$B%$%s%?%U%'!<%9(BMTU$B$r(BIPv6 minimum link MTU$B$h$j>.$5$/$7$F$7$^$C$?>l9g$K$D(B
$B$$$F$I$&?6$kIq$&$Y$-$+$O!"$H$/$K$=$N%$%s%?%U%'!<%9$r(BIPv6$BMQ$K;H$$$O$8$a(B
$B$F$7$^$C$?8e$@$H!"$$$m$$$m$J0UL#$G$J$+$J$+Fq$7$$$H$3$m$G$9!#:#2s$O(B2.$B$N(B
$BJQ99$K$h$jCm0U$rB%$7$F!"8e$O4IM}<T$NH=CG$K$^$+$;$k!"$H$$$&O)@~$r<h$k$3(B
$B$H$K$7$^$7$?!#(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
