jbn@GLACIER.STANFORD.EDU.UUCP (02/16/87)
If implementors want to regard ICMP Destination Unreachable as non-fatal in TCP, hoping that things will get better, they should at least crank up the retransmit timer and slam the congestion window when it happens, since if things are so bad that one is getting ICMP Destination Unreachable, one should at least back off. One could think of Destination Unreachable as a very strong Source Quench. John Nagle