$B'#'Z'X(B $B'd'`'S'Q(B, $B'^'`'X'V(B $B'U'Q(B $B'd'Z(B $B'V(B
$B'`'d(B $B'a'`']'Y'Q(B...!!!
(B
(B
(B============================================================================
(BEthernet flow/control
(B *
(B With large switches it is necessary to be able to limit the flow of
(Bpackets to avoid packet discarding following an overflow
(B *
(B Vendors had tried to implement non standard mechanism to overcome the
(Bproblem
(B *
(B One of this mechanism that could be used for half/duplex links is
(Bsending carrier bursts to simulate a busy channel
(B *
(B This mechanism does$B!G(Bnt apply to full/duplex links
(B *
(B MAC control protocol : to support flow control on f/d links
(B o a new ethernet type = 0x8808, for frames of 46 bytes (min
(Blength)
(B o first 2 bytes are the opcode other are the parameters
(B o opcode = 0x0001 PAUSE stop txmitting
(B o dst address = 01-80-c2-00-00-01 (an address not forwarded by
(Bbridges)
(B o following 2 bytes represent the number of 512 bit times to stop
(Btxmission
(B===========================================================================
(B
$B'*(B $B'd'`'S'Q(B:
(B===========================================================================
$B!|(B IEEE802.3x$B!JA4Fs=E%U%m!<@)8f!?(BFull Duplex PAUSE Operation$B!K(B
(B[EMAIL PROTECTED]"%I%l%9(B $B!a(B 01-80-C2-00-00-01
$B%$!<%5%M%C%H%?%$%W!a(B 0x8808
(BMAC$B@)8fL?Na(B $B!a(B 0x0001
(B===========================================================================
(B
(B
(B-----Original Message-----
(BFrom: [EMAIL PROTECTED]
(B[mailto:[EMAIL PROTECTED] On Behalf Of $B'*'S'`(B $B'4'Q'i'V'S(B
(BSent: Tuesday, March 01, 2005 7:22 PM
(BTo: lug-bg@linux-bulgaria.org
(BSubject: Re: lug-bg: $B'3'd'b'Q'_'V'_(B $B'd'b'Q'f'Z'\(B
(B
$B'/'Q(B 01 03 2005 18:30 Dragomir Zhelev $B'_'Q'a'Z'c'Q(B:
(B> $B')'U'b'Q'S'V'['d'V(B,
(B>
(B> $B'`'d(B $B'_'q'\'`']'\'`(B $B'c'V'U'^'Z'h'Z(B
(B> $B'_'Q'R']'p'U'Q'S'Q'^(B $B'c(B tcpdump $B'c']'V(B
$B'U'_'Z'q(B $B'd'b'Q'f'Z'\(B :
(B>
(B>
(B> 18:22:17.358898 00:00:00:00:00:00 > 01:80:c2:00:00:01, ethertype Unknown
(B> (0x8808), length 60:
(B> --- cut ---
(B>
(B> $B'1(B.$B'3(B $B'd'Z'q(B 00:00:00:00:00:00 > 01:80:c2:00:00:01
(B> $B'_'V(B $B'c'Q(B MAC $B'Q'U'b'V(B
$B'c'Z(B $B'`'d(B $B'^'b'V'X'Q'd'Q(B
(B> $B'^'Z(B $B'a'`'_'V'X'V(B $B'a'b'V'd'l'b'c'Z'g(B $B'Y'Q(B
(B> $B'd'q'g(B $B'S'l'S(B $B'S'c'Z'i'\'Z(B $B'V'd(B
$B'V'b'c(B $B'R'Q'Y'Z(B $B'R'V'Y(B $B'U'Q(B $B'`'d'\'b'Z'q(B
$B'\'Q'\'S'`'d'`(B $B'Z(B $B'U'Q(B
(B> $B'V(B.
(B>
(Bethertype $B'V(B $B'b'V'T'Z'c'd'b'Z'b'Q'_(B $B'`'d(B Bay Networks -
$B'd'`'S'Q(B $B'^'`'X'V(B $B'Z(B
$B'U'Q(B $B'a'`'^'`'T'_'V(B?
(B
(B--
$B'*'S'`(B $B'4'Q'i'V'S(B
(B"$B'&'3','0'2'4(B" $B'3'%(B - $B'\'`'^'a'p'd'l'b'V'_(B $B'c'V'b'S'Z'Y(B
$B'd'V'](B. /02/963-04-02
(B============================================================================
(BA mail-list of Linux Users Group - Bulgaria (bulgarian linuxers).
(Bhttp://www.linux-bulgaria.org - Hosted by Internet Group Ltd. - Stara Zagora
(BTo unsubscribe: http://www.linux-bulgaria.org/public/mail_list.html
(B============================================================================
(B
(B============================================================================
(BA mail-list of Linux Users Group - Bulgaria (bulgarian linuxers).
(Bhttp://www.linux-bulgaria.org - Hosted by Internet Group Ltd. - Stara Zagora
(BTo unsubscribe: http://www.linux-bulgaria.org/public/mail_list.html
(B============================================================================
