On Mon, 2012-07-02 at 15:23 +0200, Simon Goldschmidt wrote: > "Pomeroy, Marty" <[email protected]> wrote: > > > The TCP_TMR_INTERVAL is the time the stack should wait for an ACK from > > my master, right? > > > > Yes, before it re-transmits. > > Is that so? I would have thought that slow-retransmission depends on > the connection's RTO (which is normally an order of magnitude slower > than 250ms!) while fast-retransmission does not depend on timer > intervals but is triggered by receiving 2 dup-ACKs.
Simon's right. The estimation of the RTO though may be (i) measured in slow timer ticks; and (ii) potentially much less than 1 slow timer tick. In these cases the stack will wait for exactly TCP_TMR_INTERVAL. In cases where the RTO is measured to be more than that it will wait longer. Kieran _______________________________________________ lwip-users mailing list [email protected] https://lists.nongnu.org/mailman/listinfo/lwip-users
