From owner-FreeBSD-net-jp@jp.freebsd.org  Mon Aug 25 17:32:17 1997
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To: FreeBSD-net-jp@jp.freebsd.org
From: TANIYAMA Hideki <yoko@sunny.co.jp>
In-Reply-To: Your message of "Mon, 25 Aug 1997 00:28:56 +0900"
References: <199708241528.AAA26792@nucoop.coop.nagoya-u.ac.jp>
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Date: Mon, 25 Aug 1997 17:32:11 +0900
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Subject: [FreeBSD-net-jp 129] Re: bridge ?
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$BC+;3$G$9!#(B

>>>> On Mon, 25 Aug 1997 00:28:56 +0900,
>>>> 	Mitsuru Ogino <ogino@coop.nagoya-u.ac.jp> wrote:

>> Switching HUB $B$H$$$&$N$r$7$C$+$j$HM}2r$7$F$$$J$$$N$G$$$1$J$$$N$G$9(B
>> $B$,!"$3$N(BHUB$B$rF3F~$7$?>l9g!"!VG$0UFsE@4V$K#4Bf$^$G!W$H$$$&LdBj$b2sHr(B
>> $B$G$-$k$N$G$7$g$&$+!)(B

ogino> $B2sHr$G$-$^$9!#(BSwitching HUB $B$O3N$+$K(B HUB $B$N3J9%$r$7$F$$$^$9$,!"(B
ogino> $BF/$-$O(BBridge $B$J$N$G!"(BHUB $B$H>JN,$9$k$N$O8D?ME*$KDq93$,$"$j$^$9!#(B
ogino> $BC;$/$$$&$H$-$K$O!V%9%$%C%A!W$H8F$s$G$$$^$9!#(B

$B$3$N$X$s$NOC$r0JA0(BIRC$B$G$A$g$C$H$7$?$3$H$,$"$C$F!"$=$N;~$O7kO@$,=P$J$+$C(B
$B$?$N$G!"$3$N>l$r<Z$j$F$_$J$5$s$N$*CN7C$rGR<Z$5$;$F$$$?$@$-$?$$$H;W$$$^(B
$B$9!#(B

$B$?$H$($P!"(BRepeater$B$NCJ?t$K@)8B$,$"$k$N$O!"(B(Repeater$B$O$?$@$N%"%s%W$G$9(B
$B$+$i(B)$BC1$KGH7A$,$J$^$k$@$1$J$N$+!"$=$l$H$b(B802.[23]$B$K5,Dj$5$l$k(BCSMA/CD$B$N(B
$BJ}<0$K$+$i$s$G!"(BJabber$BAw=PA0$N(Brandom delay$B!"$"$k$$$O(BJabber$B$=$N$b$N$NEA(B
$BAwCY1d$H>WFM8!=P%?%$%_%s%0$J$I$K$+$i$s$G>e8B$,7h$^$C$F$k$N$+$J!)$J$s$F(B
$B$$$&OC$K$J$C$?$N$G$9$,!D(B

$B$"$d$U$d$J5-21$G?=$7Lu$J$$$N$G$9$,!"$O$k$+@N(B(Ethernet=10base5$B$@$C$?:"(B)$B!"(B
$B2?$+$N;qNA$G(BBridge$B$N:G9bCJ?t$O(B7$BCJ$@!D$J$s$F$$$&OC$rFI$s$@5-21$,$"$j$^(B
$B$7$F!"(BIRC$B$G$N2qOC$G$O!V3N$+$=$s$J$N$,$"$C$?$h$&$J5$$,$9$k!W$H$$$&OC$K(B
$B$J$j$^$7$?!#(B

$B$J$i$P!"$=$N@)8B$O$I$3$+$i=P$F$/$k$N$@$m$&!)$H$$$&OC$K$J$C$?$N$G$9$,!"(B
$B7k6IG<F@$G$-$k:,5r$r;W$$$D$/$3$H$,$G$-$^$;$s$G$7$?!#(B

$B;3K\$5$s$,$*$C$7$c$C$F$$$?$h$&$K!"(BBridge$B$O(Bdatalink layer$B$G$NCf7Q$r9T$J(B
$B$&$o$1$G!"(BEthernet frame$BC10L$N$d$j$H$j$r@UG$;}$C$F(B(?)$B$d$C$F$/$l$^$9!#(B
($B$H8@$C$F$b!"(Berror free$B$H$$$&0UL#$G$O$"$j$^$;$s$,(B)

$B$b$A$m$s!"L58B$KCJ?t$r=E$M$i$l$k$o$1$G$O$J$$$G$7$g$&$,!"(B7$BCJ$d$=$3$i$G(B
$BF,BG$A$K$J$kM}M3$H$$$&$N$,$I$&$7$F$b;W$$$D$+$J$+$C$?$o$1$G$9!#(B10$BCJ$d(B20
$BCJ=E$M$?$H$3$m$G!">e0L(Blayer$B$G$N(Bhandshake$B$K1F6A$,=P$k$[$I$N(Bdelay$B$,=P$k(B
$B$o$1$J$$$h$J!D$H$$$&OC$K$J$j$^$7$?!#(B

$B$G!D7k6I!"0J2<$N$&$A$N$I$l$J$N$G$7$g$&$M!)(B

1. Bridge$B$O(B7$BCJ>e8B$J$s$F$$$&5-21<+BN$,;W$$0c$$$G$"$k!#(B

2. 10Base5$B$N:"(B($B@N(B)$B$N(BBridge$B$K$O$=$&$$$&@)8B$,$"$C$?$,!":G6a$N(BSwitching
   Hub$B$G$O<BMQ>e$=$N$h$&$J@)8B$O$J$/$J$C$?!#(B

3. $B<B$O!":#$G$b@)8B$,$"$k!#(B(7$B$H$$$&?t;z$,@5$7$$$+$I$&$+$OJL$H$7$F(B)

$B$A$J$_$K!"(BIRC$B$G$3$N%M%?$,=P$?$N$O!"!V(Bend-to-end$B$N(Bshared-hub$B$NCJ?t$r4*(B
$BDj$9$k;~$K!"4V$K(Bswitch$B$,$"$C$?$i$=$3$GL5>r7o$K%+%&%s%H$r%/%j%"$7$F$b$$(B
$B$$$N$+!)!W$H$$$&OC$K$J$C$?;~$G$7$?!#(B

$B!A!A!A!A!A!A!A!A!A!A!A!A!A!A!A!A!A!A!A(B  $BC+;3(B $B=(<y(B yoko@sunny.co.jp
  $B$h$3$J$_(B $B$h$3$J$_(B $B$h$3$J$_(B $B$h$3$J$_(B   $B3t<02q<R(B $B%5%K!<%=%U%H(B
