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Internet Message Format  |  1993-01-21  |  1.7 KB
  1. Path: sparky!uunet!usc!sdd.hp.com!hamblin.math.byu.edu!arizona.edu!mvb.saic.com!info-multinet
  2. Newsgroups: vmsnet.networks.tcp-ip.multinet
  3. Subject: How come [UNKNOWN] in SHOW/ARP?
  4. Message-ID: <930121092115.20c0363d@SRCL.SUNNYBROOK.UTORONTO.CA>
  5. From: SYSCHIP@SRCL.SUNNYBROOK.UTORONTO.CA (Chip Campbell)
  6. Date: Thu, 21 Jan 1993 9:21:15 -0500 (EST)
  7. Organization: Info-Multinet<==>Vmsnet.Networks.Tcp-Ip.Multinet Gateway
  8. X-Gateway-Source-Info: Mailing List
  9. Lines: 26
  10.  
  11. Here is a typical (abridged) output from MULT SHOW/ARP on my main server:
  12.  
  13. >MultiNet ARP table:
  14. >Host Network Address                   Ethernet Address    Arp Flags
  15. >--------------------                   ----------------    ---------
  16. >[UNKNOWN] (IP 142.76.1.204)            00:00:C0:AE:95:58   Temporary
  17. >[UNKNOWN] (IP 142.76.1.193)            00:00:C0:A6:94:58   Temporary
  18. >ROBIN.SUNNYBROOK.UTORONTO.CA (IP 142.  AA:00:04:00:68:F0   Temporary
  19. >SRRTR.SUNNYBROOK.UTORONTO.CA (IP 142.  AA:00:04:00:7D:F0   Temporary
  20. >SRPC12.SUNNYBROOK.UTORONTO.CA (IP 142  00:00:C0:9B:25:1C   Temporary
  21. >SRPC16.SUNNYBROOK.UTORONTO.CA (IP 142  00:00:C0:90:1A:2B   Temporary
  22. >[UNKNOWN] (IP 142.76.1.194)            00:00:C0:44:94:58   Temporary
  23. ...etc
  24.  
  25. All of the [UNKNOWN] addresses are in fact perfectly well known, and are
  26. decoded properly when I do MULT NSLOOK/TY=PTR xx.1.76.142.IN-ADDR.ARPA. So
  27. how come SHOW/ARP isn't decoding them?  Is this a real problem or nothing to
  28. worry about?  It doesn't really bug me, although it WOULD be useful if
  29. [UNKNOWN] flagged, at a glance, hosts which really weren't in the DNS,
  30. 'cause that would mean I'd misconfigured something. 
  31.  
  32. Thanks,
  33.  
  34. Chip Campbell
  35. Sunnybrook Health Science Centre (University of Toronto)
  36. syschip@srcl.sunnybrook.utoronto.ca
  37.