Pause frame address determines its not be bridge, the purpose of forwarding, which means that it can't through the switches? If A and B by switches sends data to C, C congestion, send PAUSE FRAME, must be through the switch to A and B ah, why say not be switches forward? There is no master answer, thank you

CodePudding user response:

Based on my experience can give you an example to explain, assume that the TC (flow meter, used to produce traffic) port 1 to send packets to switch port 2, the second after switches forward, out of the port 3, if the port 3 to congestion, and TC can port 1 flow control, 2 flow control can also make the switch port, port 1 to send packets rate will reduce rate for the port 3 out, this is the flow control function,

CodePudding user response:

First, do you know about pause frame format is definitely not! PAUSE the frame of the destination address is 0180 c2000001, instead of sending to the MAC address of A and B! Switch is not forwarded, but delay forwarding, pause has two bytes of the frame is used to represent the stop sending time, after this time, the switches will continue to forward! Say well, remember to points!

CodePudding user response:

C congestion, send PAUSE FRAME to switch, switch if the flow control, will slow down, don't slow down if not open flow control, the is C will lose processing package, should be engraved, so remember to points oh

CodePudding user response:

reference printf_mylife reply: 3/f

C congestion, send PAUSE FRAME to switch, switch if the flow control, will slow down, don't slow down if not open flow control, the is C will lose processing package, should be engraved, so remember to points oh

Are you sure is exchange of open flow control, is slow, not pause to send? ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~

CodePudding user response:

reference 4 floor u012202729 response:

Quote: reference printf_mylife reply: 3/f

C congestion, send PAUSE FRAME to switch, switch if the flow control, will slow down, don't slow down if not open flow control, the is C will lose processing package, should be engraved, so remember to points oh

Are you sure is exchange of open flow control, is slow, not pause to send? ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~

reference 4 floor u012202729 response:

Quote: reference printf_mylife reply: 3/f

C congestion, send PAUSE FRAME to switch, switch if the flow control, will slow down, don't slow down if not open flow control, the is C will lose processing package, should be engraved, so remember to points oh

Are you sure is exchange of open flow control, is slow, not pause to send? ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~

Receives the flow control frame sent will be suspended for a period of time after (flow control with time), received after the time of zero flow control frame or timeout continue to send, if it is timeout after sending this kind of situation, send flow control frame of one party does not necessarily can handle well, will lead to packet loss. Size is important, so with time parameter is too small flow control effect is not so good, as a whole is, the greater the greater the time to slow down but usually the time value is 0 XFFFF, work time is too small.

CodePudding user response:

refer to the second floor u012202729 response:

first, do you know about pause frame format is definitely not! PAUSE the frame of the destination address is 0180 c2000001, instead of sending to the MAC address of A and B! Switch is not forwarded, but delay forwarding, pause has two bytes of the frame is used to represent the stop sending time, after this time, the switches will continue to forward! Say well, remember to points!

You're right, did not know the frame structure, how to give points,

CodePudding user response:

The entry of link congestion or not acceptable