RE: [ethmac] Hai...

[suresh.dorepally@st.com]

Thank u for your reply...
How the maximum transfer time can be 2 * 1518 bytes . The maximum
ethernet frame is anyway 1518 bytes .So the time taken to transmit this
frame is 2 * 1518 transmit clocks...Is it right or not...
Is this true that the incorporation of defer counter is just to abort
transmission of a packet which doesn't got a chance to transmit due to
occupation of the media...
and is it justified to abort a packet transmission for the reason of
unavailability of the media...
What happens  if it happens to every packet in an a worst case ....
Thanks in advance.
Best Regards
Suresh

> A transfer is suppose to be finished in a predifined period of time.
While
> one station is transmitting, all the others are waiting. The maximum
> transfer
> time is 2 x 1518 bytes. When the carrier sense is not deasserted within
that
> period of time, the defer counter reaches the excessive defferal value
> and a packet can be aborted or the MAC can wait forever for the
carrier.
> 
> Regards,
> 	Igor
>