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[LDM #GHA-946718]: Lost connectivity to idd.unidata.ucar.edu at 10:41 UTC

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  • Subject: [LDM #GHA-946718]: Lost connectivity to idd.unidata.ucar.edu at 10:41 UTC
  • Date: Mon, 26 Jul 2021 09:15:35 -0600
Hi,

re:
> Are supposed to be resolving to 128.117.135.3 for idd.unidata.ucar.edu?

No.  We moved the IP address from the old cluster (the on in the NWSC
computer room) to the new cluster (the one in the NCAR Mesa Lab), so
the IP address was and continues to be:

128.117.130.3

128.117.135.3 is the IP address for the old cluster.  Until the cluster
was turned off (mostly last night), one could REQUEST feed(s) from it,
but I noted that you were _not_ REQUESTing from it.

re:
> ldm@mammatus:~$ ldmping idd.unidata.ucar.edu
> 20210726T145704.284118Z ldmping[13391] INFO ldmping.c:51:print_label()      
> State    Elapsed Port   Remote_Host           rpc_stat
> 20210726T145704.284384Z ldmping[13391] INFO error.c:236:err_log() Resolving 
> idd.unidata.ucar.edu to 128.117.135.3 took 0.000187 seconds
> 
> root@mammatus:~# nslookup idd.unidata.ucar.edu
> Server:         129.118.1.47
> Address:        129.118.1.47#53
> 
> Non-authoritative answer:
> Name:   idd.unidata.ucar.edu
> Address: 128.117.130.3

This is the correct IP address.

re:
> I'm getting different DNS resolutions between linux nslookup and ldmping.

That is very interesting indeed.  Did someone hardwire an IP <-> name
association in the /etc/hosts file on mammatus?

Cheers,

Tom
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Ticket Details
===================
Ticket ID: GHA-946718
Department: Support IDD
Priority: Normal
Status: Closed
===================
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