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To: FreeBSD-users-jp@jp.freebsd.org
From: "MIYOKAWA, Nobuyoshi" <nmiyo@hic.co.jp>
In-Reply-To: Your message of "Wed, 27 May 1998 20:00:06 +0900 (JST)"
	<199805271100.UAA21568@mail.hitachi-cable.co.jp>
References: <199805271100.UAA21568@mail.hitachi-cable.co.jp>
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Subject: [FreeBSD-users-jp 28789] Re: Is IP_DF flag always set to 1?
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From: Ito Kazumitsu <ito@htk.hitachi-cable.co.jp>
Subject: [FreeBSD-users-jp 28761] Is IP_DF flag always set to 1?
Date: Wed, 27 May 1998 20:00:06 +0900 (JST)
Message-ID: <199805271100.UAA21568@mail.hitachi-cable.co.jp>

| $BF|N)EE@~$N0KF#$H?=$7$^$9!#(B
| 
| FreeBSD $B$N%^%7%s$+$iAw=P$5$l$k%Q%1%C%H$N(B IP $B%X%C%@$N(B IP_DF $B$,(B
| $B>o$K(B 1 $B$K$J$C$F$7$^$&$H$$$&8=>]$KG:$s$G$$$^$9!#(B
...
| Ethernet $B$N(B MTU 1500 $B$.$j$.$j$N%Q%1%C%H$,!"1s3VCO$N(B
| $B%k!<%?$N(B MTU 1492 (IEEE 802.3) $B$N%$%s%?!<%U%'%$%9$K(B
| $B9T$/$H!"$=$3$G(B fragment $B$,$J$5$l$:$KGK4~$5$l$F$7$^$&!#(B
| 

  $B%=!<%9$rFI$`$N$,2<<j$J$N$G!"B?J,$K21B,$,:.$8$C$F$$$k$N$G$9(B
$B$,!"(B

  1) MTU $BC5:w$r(B TCP $B$G$b$d$m$&!#(B
  2) $B$=$l$K$O(B IP_DF $B$K(B 1 $B$rN)$F$J$/$A$c!#(B
  3) $BAw?.$7$?%Q%1%C%H$,%U%i%0%a%s%HMW5a$G!"%(%i!<$K$J$C$?$h!#(B
  4) $B$7$+$b%(%i!<Fb$K(B MSS $B$,=q$+$l$F$$$J$$$>!#(B
  5) $B;EJ}$,$J$$$+$i(B MSS $B$r?dB,$7$h$&!#K\Ev$O!"(B576 $B$K$7$J$/$A$c(B
     $B$$$1$J$$$s$@$1$I!":r:#$N(B Internet $B$K$O9g$o$J$$$+$i!"$=(B
     $B$N7PO)$N:G>.CM$K$9$l$PNI$$$h$M!#(B

$B$HF0:n$7$F$$$k$h$&$K8+$($^$9!#0KF#$5$s$N>l9g$O!"$3$N(B 5) $B$K$V(B
$B$D$+$C$F$7$^$C$?$N$G$O$J$$$G$7$g$&$+(B?

# TCP$B%;%0%a%s%H$NAw?.B&(B/$B<u?.B&$N(B MSS $B$,!"$H$b$K(B 1492 $B0J>e$J(B
# $B$N$G$7$g$&$+(B?

  $B$b$7;d$N21B,$,@5$7$1$l$P(B($B>/$J$/$H$b!"(B2.2.5R $B$N%=!<%9>e$G$O(B)$B!"(B

| $BBP>INEK!$H$7$F$O!"(BMTU $B$r@hJ}$K9g$o$;$F>.$5$/$9$k$H(B
| $B$$$&$3$H$G2?$H$+$J$j$=$&$G$9$,!"3d$j$-$l$J$$$b$N$r(B
| $B46$8$^$9!#(B

$B$9$k$7$+$J$5$=$&$J5$$,$7$^$9!#$^$?$O!"(B

From: Ito Kazumitsu <ito@htk.hitachi-cable.co.jp>
Subject: [FreeBSD-users-jp 28786] Re: Is IP_DF flag always set to 1?
Date: Thu, 28 May 1998 10:47:17 +0900 (JST)
Message-ID: <199805280147.KAA27100@mail.hitachi-cable.co.jp>

| $B$H$"$j$^$9$,!"$3$N(B #if 1 ... #endif $B$N0U?^$O2?$J$N$G$7$g$&$+!#(B
| $B$3$l$r(B #if 0 $B$KJQ99$7$F%3%s%Q%$%k$7$F$bBg>fIW$G$7$g$&$+!#(B

$B$H=q$+$l$F$$$^$9$h$&$K!"(B#if 1 $B$r(B #if 0 $B$K$9$l$P(B TCP $B$N(B MTU
$BC5:w$O9T$o$l$J$$$h$&$J5$$,$7$^$9(B($B$,!"$3$l$ODj$+$G$O$"$j$^$;(B
$B$s(B)$B!#(B

# FreeBSD-net-jp $B%a%$%j%s%0%j%9%H$G;G$&$H!";d$J$I$h$j$b3N$+(B
# $B$JEz$($,F@$i$l$=$&$J5$$,$7$^$9(B...$B!#(B
-- 
MIYOKAWA, Nobuyoshi / nmiyo@hic.co.jp
