[EHPweb] DFC DMZ Network Outage - Saturday 14 July 2012

[Christopher J Bidwell]

As you may be aware, the DFC DMZ is having a scheduled network outage in 
order to upgrade their routers / switches to ipv6.  The portion of this 
upgrade for the DFC DMZ will occur from ~8-8:30 Mountain on Saturday (14 
Jul 2012) so we're looking at at least a 30 minute outage for our systems. 
  Looking at Level3's configuration of our setup for ehp1 and 4 and 
ehpcache-den, we have a 1 minute TTL for our servers, so they should 
automatically (in that time frame) become unavailable.  At which time we 
will only be running on ehpcache-men for those 30 minutes.  Once the 
network comes back up, the aliveness checking will reacquire ehpcache-den. 
 

I'm debating on whether to manually exclude the Denver systems from L3 or 
rely on the failover.  We have tested the failover and it does work 
properly.

Along with ehpcache-den (caching for ehp1 and ehp4), other servers 
affected are ghscweb.cr.usgs.gov (geohazards and geomag.cr), 
pdl1.cr.usgs.gov, eids1.cr.usgs.gov, comcat.cr.usgs.gov, ciimwebden, 
ciimwebden2, ciimwebmaster,  (also covered by L3), igskcicggsgis, and 
gldplone (neic.usgs.gov).

If you have any questions, please let me know.  I will be in the office to 
ensure our systems come back online as soon as possible.
----------------
Thank you,

Chris Bidwell, RHCSA
Red Hat Linux Administrator
National Earthquake Information Center
US Geological Survey
email: cbidwell at usgs.gov
work: 303-273-8642
mobile: 303-435-6362
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