Update: 12:18 AM
All network maintenance is complete.  There 
was a short outage, roughly 3-5 minutes in duration due to an issue we 
experienced with the NSSU upgrade.  Since we had engineers engaged 
on-site, we were able to address the problem very quickly.
Update: 11:23PM
NSSU update is completed. 
Update: 10:30PM
NSSU update is in progress.
Update: 10:13PM
We
 are almost complete with re-enabling redundancy on dist3.denver2.  Once
 this is complete, we will perform an NSSU upgrade to the chassis 
cluster.
Update: 9:09 PM
Our work is beginning.  
Date: August 13, 2019
Time: 9:00 PM - 2:00 AM (Mountain Time)
Purpose of Work: After the network incident on August 12, 2019, we have some critical tasks that we need to carry out this evening to restore redundancy to our network core.
- Restore redundancy to our      dist3.denver2 switch stack.
 - Upgrade JunOS on our dist3.denver2      switch stack to the latest JTAC recommended JunOS.  
 
Impact of Work:
This work will impact our clients in two distinct manners:
It will experience network      disruptions up to 15 minutes in duration during this maintenance      window. Theoretically, it should be possible to do the work we need      to do with very little network impact, but after the events which      transpired on Monday, it's hard to say that with any level of confidence.