[HECnet] Is MIM running?

[Tomas Prybil]

Here is a small tcpdump with the ping from A34RTR (34.1023) and FORGER (34.101) for anyone to dig into.
Full pcap file added as attachment.

10:29:02.072710 34.1023 > 34.101 100 link-service 35839>34917 seg 0 dat seg count 0
10:29:02.082747 34.101 > 34.1023 28 disconn-confirm 34917>35839 no link terminate
10:29:02.083147 34.1023 > 34.101 100 link-service 35839>34917 seg 0 dat seg count 0
10:29:02.105797 34.101 > 34.1023 28 disconn-confirm 34917>35839 no link terminate
10:29:02.106169 34.1023 > 34.101 100 link-service 35839>34917 seg 0 dat seg count 0
10:29:02.124764 34.101 > 34.1023 28 disconn-confirm 34917>35839 no link terminate
10:29:02.125142 34.1023 > 34.101 100 link-service 35839>34917 seg 0 dat seg count 0
10:29:02.143922 34.101 > 34.1023 28 disconn-confirm 34917>35839 no link terminate
10:29:02.144279 34.1023 > 34.101 100 link-service 35839>34917 seg 0 dat seg count 0
10:29:02.163085 34.101 > 34.1023 28 disconn-confirm 34917>35839 no link terminate


BR
/t

Den 2021-10-20 19:03 skrev "owner-hecnet at Update.UU.SE på uppdrag av Paul Koning" <owner-hecnet at Update.UU.SE på uppdrag av paulkoning at comcast.net> följande:

    Thanks!  BTW, I've been doing some work on Wireshark to fix its DECnet decoding, there are quite a bunch of errors in there.

    	paul

    > On Oct 20, 2021, at 12:59 PM, Dave McGuire <mcguire at neurotica.com> wrote:
    > 
    > On 10/20/21 12:54 PM, Paul Koning wrote:
    >>>>> Say, that is a very nice ping utility you have!  Would you know where I could get the source to it or its theory of operation?
    >>>> I wonder too.  The DEC standard answer would be an "NCP loop node foo" command, which is an application protocol but a simple one (mirror, object 25).
    >>> 
    >>>  The ping command that he illustrated is from IOS on a Cisco router.
    >> Ok, then it's anyone's guess what it does; Cisco doesn't really understand DECnet or know how to read the specs.  It would be informative to capture a packet trace showing what was sent and received.
    > 
    >  Seems to work pretty well here, and has for the better part of thirty years, for me.
    > 
    >  If I get any desk time soon I'll see if I can capture some traces for you.
    > 
    >            -Dave
    > 
    > -- 
    > Dave McGuire, AK4HZ
    > New Kensington, PA

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