More network statistics


Chris Torek (chris@gyre.umd.edu)
Sun, 16 Mar 86 02:47:57 EST


Some more statistics for you, made pretty much at random:

        % date
        Sun Mar 16 02:21:40 EST 1986
        % ping sac-milnet-gw
        ...
        ----sac-milnet-gw PING Statistics----
        80 packets transmitted, 67 packets received, 16% packet loss
        round-trip (ms) min/avg/max = 410/11971/37350

Pretty wild variance, no?

Other gateways show similar statistics:

        ----bbn-milnet-gw PING Statistics----
        89 packets transmitted, 67 packets received, 24% packet loss
        round-trip (ms) min/avg/max = 230/3614/28830

        ----arpa-milnet-gw PING Statistics----
        54 packets transmitted, 44 packets received, 18% packet loss
        round-trip (ms) min/avg/max = 110/6850/24400

        ----dcec-milnet-gw PING Statistics----
        44 packets transmitted, 32 packets received, 27% packet loss
        round-trip (ms) min/avg/max = 200/10639/28140

        ----isi-milnet-gw PING Statistics----
        32 packets transmitted, 26 packets received, 18% packet loss
        round-trip (ms) min/avg/max = 250/9301/21880

[You can see my patience with statistics-gathering going steadily
down here :-).]

In all cases I did see some RFNM blocking; at least something out
there is doing flow control. What this all means (besides `I cannot
get anything done at Berkeley with this going on') is beyond me,
but I am surprised to see this kind of variance at 2 AM Sunday
morning.

But it is not just the gateways! Pinging a MILNET site shows the
same thing:

        ----sri-nic.arpa PING Statistics----
        62 packets transmitted, 49 packets received, 20% packet loss
        round-trip (ms) min/avg/max = 370/7923/29060

I just had another thought: ping ourselves:

        ----26.2.0.57 PING Statistics----
        76 packets transmitted, 73 packets received, 3% packet loss
        round-trip (ms) min/avg/max = 90/1879/13920

Now that seems odd.

(Boy will I be glad when we get an ARPA line; at least we will no
longer be tormenting the bridges so much.)

Musingly,
Chris



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