IEEE 802.3 PAUSE frame
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Posted by mihau on January 5, 2005, 6:24 pm
Please log in for more thread options Question regarding 802.3x MAC control frames: MAC controller receives PAUSE frame during own transmission of (another) frame. When pause timer with new pause_timer_value should be started? Immediately after valid RX PAUSE is received or rather after MAC finishes sending (probably this)? thanks in advance, Michal | ||||||||||||||||
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Posted by Rich Seifert on January 5, 2005, 11:42 am
Please log in for more thread options As you guessed, he timer is started after the completion of the station's own transmission. See IEEE 802.3, Annex 31B, Figure 31B-2: The condition for entering the "PAUSE FUNCTION" state (where the timer is started) is gated by the expression "transmission_in_progress = false AND (DA = reserved_multicast_address or phys_Address)". Thus, the timer is not started until there is no transmission in progress. -- Rich Seifert Networks and Communications Consulting 21885 Bear Creek Way (408) 395-5700 Los Gatos, CA 95033 (408) 228-0803 FAX Send replies to: usenet at richseifert dot com | ||||||||||||||||
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> Question regarding 802.3x MAC control frames:
> MAC controller receives PAUSE frame during own transmission of (another)
> frame. When pause timer with new pause_timer_value should be started?
> Immediately after valid RX PAUSE is received or rather after MAC finishes
> sending (probably this)?
>