From owner-FreeBSD-net-jp@jp.freebsd.org  Sun Feb 28 18:44:01 1999
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Date: Sun, 28 Feb 1999 18:46:01 +0900
From: "Kono Ken'ichi" <s96355kk@sfc.keio.ac.jp>
To: FreeBSD-net-jp@jp.freebsd.org
In-Reply-To: <199902280232.LAA03634@serv1.hq.imagica.co.jp>
References: <199902280232.LAA03634@serv1.hq.imagica.co.jp>
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Subject: [FreeBSD-net-jp 1400] Re: subnetmask
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$B$?$S$?$S9CLn$G$9!#$*$$$+$o$5$s!"$*JV;v$"$j$,$H$&$4$6$$$^$9!#(B

$B!!K?(BK$BBg3X$N%M%C%H%o!<%/Ak8}$N?M$O!"D>@\OC$rJ9$-$KNI$/$HCzG+$K@bL@$7$F$/$l(B
$B$k$s$G$9$,!"%5%V%M%C%H!"%5%V%I%a%$%s$N?=@A$rAk8}$G$7$?;~!"(B 
IP$B%"%I%l%9$7$+65$($F$/$l$^$;$s$G$7$?!#(B

$B!t4IM}<TE*$JBVEY$H$7$F!"I,MW0J>e$N$3$H$O2?$b65$($J$$$C$F$N$O!"(B
$B!t@5$7$$5$$,$7$^$9!#(B

$B!t$&!A$s!"$@$s$@$s!"%W%i%$%Y!<%H%"%I%l%9$GNc$r=q$$$?$3$H$K(B
$B!t0UL#$,L5$/$J$C$F$-$^$7$?!#4X78<T$NJ}!"$*<8$j$N%a!<%k$O4*J[$7$F$/$@$5$$!#(B

Minoru Oikawa <mino@bb.imagica.co.jp> wrote:

>  $B$*$$$+$o(B@IMAGICA $B$G$9!#$b$R$H$D=q$$$F$*$3$&$+$J!#(B
>  $BA0Ds>r7o$K$O(B /20 $B$H$@$1=q$$$F$"$k$s$G$9$1$I(B?
>  /20 $B$r(B subnet $B2=$7$F;H$C$F$$$k!"$NA0Ds>r7o$,0EL[$K$J$5$l$F(B
> $B$$$k!"$H$$$&M}2r$rMW5a$7$F$$$k$C$F$3$H(B?

$B!!$=$&$G$9!#%[%9%H(B1$B$r@_Dj$7$?;~!"(B/20$B!!$N;v<B$rKM$OCN$j$^$;$s$G$7$?!#(B

>  /masklen $B$N5-K!$H(B mask $B$r$0$A$c$0$A$c$K:.$<$F=q$/$N$ONI$/$J(B
> $B$$$G$9!#$I$C$A$+$K$9$k!"$b$7$/$OA4$FJ;5-$9$k!#(B

$B!!$=$&$$$&$b$N$J$s$G$9$M!#(B
$B2?$+<ALd$7$?$$$H$-$KD>@\<ALd$G$-$k@hGZ$,$$$J$$$s$G$9!#!J%9%Z%$%s8l$G$9$+(B
$B$i(B...)$B!!$=$&$$$&!">o<1$,$"$^$jDL$8$J$$$N$G$9!#(B

$B!!$@$+$i!"B?>/!"K?(BK$BBg3X(BSFC$B$G@lLg$K$d$C$F$k?M$?$A$NH?46$rGc$$$D$D$b!"(B
[FreeBSD-net-jp]$B$G<ALd$7$F$$$k$o$1$G$9!#(B

> >  $B<B:]$N%5%V%M%C%H%^%9%/$O!"(B255.255.254.0$B!!$J$s$G$9$,!"4V0c$C$F(B
> > 255.255.255.0$B!!$r@_Dj$7$F$7$^$$$^$7$?!#(B
> >  $B$G$b!"$A$c$s$H%M%C%H%o!<%/!J%j%s%/%9%F!<%H!K$O3NN)$5$l$F$$$F!"(B
>  $B$3$l!"2?(B?
>  $B2?$G2?$rD4$Y$?$+=q$+$J$$$H(B context $B$K$h$C$FH=CG$9$k$3$H$9$i(B
> $B$b=PMh$J$$$G$9$,!#%j%s%/%9%F!<%H!"$C$F$3$H$O(B netstat -f inet
> $B$N7k2L$H$7$F!"$C$FM}2r$9$l$P$h$$$N(B?

$B!!$3$l$b!"%M%C%H%o!<%/$K$D$$$FOC$;$k?M$,?H6a$K$$$J$$$3$H$,860x$G$7$F!"4*(B
$BJ[$7$F$/$@$5$$!#4*J[$J$i$s$C$F!)(B

$BNc$($P!"(Bwww.jp.freebsd.org$B!!$r%V%i%&%6$G8+$K9T$1$k$H$$$&0UL#$G;H$$$^$7$?!#(B

$B!!$J$k$[$I!"%j%s%/%9%F!<%H$N<B:]$N0UL#$O!"(Bnetstat -f inet$B!!(B
$B$N7k2L$J$N$G$9$M!#CN$j$^$;$s$G$7$?!#(B

> > $BC<Kv#1$NB0$9$k%;%0%a%s%H$O$b$A$m$s!"$=$N30$K=P$k$3$H$b=PMh$^$9(B
>  $B5U$J$i!"FCDj$N>r7o$G%H%i%V%k$K$J$k$s$@$m$&$1$I!#(B
> > $B!!$3$l$O!"KM$,!"(B/etc/rc.conf$B!!$K$*$$$F!"(Bdefault wateway$B!!(B192.168.36.1$B!!$r(B
> > $B@_Dj$7$F$$$k$+$i$@$H;W$$$^$9!#!J(BFreeBSD2.2.8Release$B$r;HMQ$7$F$$$^$9(B) 
>  $B$o$+$i$J$$!#(B
>  $B$3$N%M%C%H%o!<%/$N>\:Y$,2?=h$K$b=P$FMh$F$J$$$+$i!#(B

$B!!5U$K$I$&$$$&>\:Y$r=q$1$P$h$m$7$$$N$G$7$g$&$+!)(B
$B7P83ITB-$f$(!"$A$g$C$H;W$$$D$-$^$;$s!#(B

> > $B!!$G$9$,!"%[%9%H(B1$B!J(B192.168.36.33$B!K$dF1%;%0%a%s%H!J(B192.168.36.0$B!K$KB0$9$k(B
> > $B%[%9%H0J30$N%[%9%H$+$i2?$G%[%9%H#1$K%"%/%;%9$G$-$k$N$G$7$g$&$+!)(B
>  arp $B$,5!G=$7$F$$$k$+$i!#(B
>  /24 $B$H8m$C$F$$$F$b!"F10l$H$_$J$5$l$k%M%C%H%o!<%/$KB0$7$F$$(B
> $B$k$+$i!#(B

$B!!$3$&$$$&Iw$K!"$9$i$C$HEz$($k$3$H$,=PMh$k?M$O$9$4$$$G$9!#(B

> > $B!!%5%V%M%C%H%^%9%/$O;2>H$7$F$$$J$/$F$H$$$&$3$H$G$7$g$&$+!)(B
>  $B!V$7$F$$$J$/$F!W2?$G$9$C$F(B? $B0UL#ITL@$C$9$h!#(B

$B!!!V;2>H$7$F$$$J$$$H$$$&$3$H$G$7$g$&$+!W$J$iI=8=$H$7$F@5$7$$$G$9$+!)(B
$B!t$d$C$Q$j!"IaCJOC$7$F$$$J$$MQ8l$r;H$&$H!"?M$K$ODL$8$J$$$h$&$G$9!#(B

$B!!$J$s$+!"$=$l$G$b4V0c$C$F$$$k5$$,$7$^$9$N$G!"4hD%$C$F8@$$$?$$$3$H$r=q$-(B
$B$^$9$H!"$"$k%[%9%H$+$i%;%0%a%s%H$,0c$&JL$N%[%9%H$K%"%/%;%9$9$k;~$O!"(B
$B$^$:!"<+J,$N%5%V%M%C%H%^%9%/$r8+$F08@h$N%[%9%H$K9T$/$?$a$N7hDj$r$7$^$9$h$M!#(B
$B$G!"08@h$K9T$/$?$a$N<!$N%N!<%I!J%[%C%W!)!K$K9T$C$F!"$=$N%N!<%I!J%[%9%H!K$O(B
$B<+J,$N%5%V%M%C%H%^%9%/$r8+$F!"!"!"!"$H$$$&Iw$K%Q%1%C%H$,>/$7$:$D$K08@h$K(B
$B6a$E$$$F!":G=*E*$K08@h$KE~C#$7$^$9!#(B

$B!!$"$%!"J8>O$K$7$F$_$F4V0c$$$K5$$,IU$-$^$7$?!#%5%V%M%C%H%^%9%/$O!"<+J,$N(B
$B%[%9%H$+$i30$N%M%C%H%o!<%/!J%;%0%a%s%H!K$K9T$/;~$K;2>H$9$k$@$1$G!"5U$N>l(B
$B9g$O!J30$N%[%9%H$+$i<+J,$N%[%9%H$KC/$+$,%"%/%;%9$7$?>l9g$O!K!"30$N%[%9%H(B
$B$O<+J,$N%[%9%H!J$H$$$&$+!"30$N%[%9%H$K$H$C$F$N:G=*08@h%[%9%H!K$N%5%V%M%C(B
$B%H%^%9%/$O;2>H$7$J$$$N$G$9$M!)@52r$C$9$+!)(B

> > $B2>$KE,Ev$J%5%V%M%C%H%^%9%/!!(B 255.0.0.0$B!!$H@_Dj$7$?$H$7$F$b30$+$i$bCf$+$i(B
> > $B$bF1MM$K%"%/%;%9$G$-$k$N$G$7$g$&$+!)(B
>  $B30$+$i(B ICMP $BEj$2$F$b!"$^$:3N<B$KJV;v$OMh$J$$$G$9$M!#(B
>  $BFbB&$+$i$@$H(B IP $B$N<BAu$K0M$k$N$+$J!#(B
>  $B$3$l$rD4$Y$?$+$C$?$i!"(B
> A. /23 $B$J%M%C%H%o!<%/$KFsBf$N%[%9%H$rN)$A>e$2$k!#(B
> B. $B$=$l$>$l$K!"(B
> 	10.0.20.3/24
> 	10.0.21.3/24
>   $B$J$I$H@_Dj$7$F$d$C$F!"(B
> C. arp $B$NMM;R$r4Q;!!#(B
>  $BN;2r(B?

$B!!%i%8%c!<(B

>  $B@8$-$F$k4{B8%M%C%H%o!<%/$K7R$$$8$c%@%a$@$h!#LBOG$@$+$i$M!#(B

$B!!$4$a$s$J$5$$!#$J$s$G<U$C$F$k$s$@$m$&!J>P!K(B
$B!t$3$l$O!"K?(BK$BBg3X$N%M%C%H%o!<%/4IM}<T$N?MC#$K$b8@$$$?$$(B
$B!t2a5n!"KM$OCN$i$:$K$$$m$$$m0-$5$r$7$F$$$?$h$&$G$9!#(B

>  $B:#!"<B:]$K(B ifconfig $B$G@5$7$/$J$$(B netmask $B$r@_Dj$7$F<B83$7$^(B
> $B$7$?$1$I!"(BFreeBSD 2.2.8-19990116-SNAP $B$J%[%9%H$N>l9g$@$H!"$U(B
> $B$D$&$K5!G=$7$F$^$9!#(B
>  $B$D$^$j$A$c$s$H%M%C%H%^%9%/$,:G=i$NH=CG4p=`$K$J$C$F$$$k$h$&(B
> $B$K8+$($^$9!#%M%C%H%^%9%/$rL5;k$7$F(B arp $B$9$k$h$&$JLBOG$J<BAu(B
> $B$K$O$J$C$F$$$^$;$s$M!#(B

$B!!%W%i%$%Y!<%H%"%I%l%9$G!"$$$m$$$m<B83$7$F$_$^$9$M!#(B
$B!t5!:`$O!"(Bmn128-soho$B!"(Bdynakook portage310CT$B!"<+:n(BK5-133$B%^%7%s(B
$B!t$7$+L5$$$G$9$,!"4hD%$C$F$_$^$9!#(B

$B!!>/$7$*$j$3$&$K$J$C$?5$$,$7$^$9!#K\Ev$K$"$j$,$H$&$4$6$$$^$9!#(B

$B!t%j%W%i%$$r2<$5$C$?B>$N3'MM$K$bF1MM$K46<U$7$^$9!#(B

-----
$B9CLn!!8,0l!!7D1~Bg3X(BSFC$B!!%9%Z%$%s8l8&5f<<(B
s96355kk@sfc.keio.ac.jp
