[evla-sw-discuss] Network outage for EVLA antennas

[James Robnett]

    It shouldn't,  it should only affect devices physically
(as opposed to logically) inside antennas 1-18 and those
two CBE systems.

    There's always a finite chance we'll need to reboot the
entire switch or we'll break something etc.  If we need
to reboot the entire switch then *all* EVLA devices/computers
will go off line for 5+ minutes.  If we horribly break the
switch then we'd be down for a day or more.

    Obviously the latter is incredibly unlikely and never
happened in the 20 years that I've been doing this but
it's always possible ... inserting the line card with
a hammer would probably accomplish it.  The latter is
only sort of tongue in cheek.  Touching anything carries
risks but they're minimal.  The expected outage are just
those items listed in the first sentence.

james

Jim Jackson wrote:
> James,
> 
> Try to coordinate this with Doug Gerrard.  They are checking out and 
> rebooting the EDFA's sometime tomorrow (one chassis keeps producing 
> laser fault alerts for no obvious reason).  It might make sense to do 
> both of these at the same time to minimize downtime.  Does your work 
> affect access to the cmib  "EMR-EDFA" or the deformatters in the new 
> correlator room?
> 
> Jim