tcp-ip@ucbvax.ARPA (06/27/85)
From: Murray.pa@Xerox.ARPA A few days ago, Andrew McDowell @ucl-cs sent a msg to namedroppers reporting round trip times to the states of "about 2.5-3 seconds". That seemed too good to be true, but when I tried popking his server, that's what I observed. Well, a while ago, I was testing a new ICMP Echo tool, and looking for strange cases, I fished around in my old mail file for Andrew's message and tried one of his hosts: 128.16.5.2. I've seen round trip times as long at 34 seconds! I'm using 20 byte packets. In the last hour or so, I've rarely seen anything as low as 3 seconds. From a recent run: 5 out of 35 packets were lost. (That's 14%.) 23% of the packets took between 7 and 10 seconds. 20% of the packets took between 10 and 14 seconds. 40% of the packets took between 20 and 28 seconds. The min time was 3.2 seconds. The max time was 28 seconds. Things just started working again. A test that just finished had a strong peak between 2 and 2.8 seconds. Oops. I guess I spoke too soon. It's back to the slow mode now. 4 out of 14 took over 28 seconds.