[outages] Fwd: Nashville

[Jay R. Ashworth]

This is from yesterday

----- Forwarded Message -----
> From: "Eric Kuhnke"
> To: "Sean Donelan"
> Cc: "NANOG" <nanog at nanog.org>
> Sent: Tuesday, December 29, 2020 6:06:00 PM
> Subject: Re: Nashville

> From a few days ago. Obviously centralizing lots of ss7/pstn stuff all in
> one place has a long recovery time when it's physically damaged. Something
> to think about for entities that own and operate traditional telco COs and
> their plans for disaster recovery.
> 
> 
> Nv1
> 
> Here is the latest update:  6:46AM 12/27:
> 
> Work continues restoring service to the CRS routers in the Nashville
> Central Office. One router remains out of service and the other is in
> service with some links remaining out of service.
> 
> The working bridge will reconvene at 08:00 CT with the following action
> plan:
> Additional cabling added to the first portable generator to enable full
> load capabilities (08:00 CT)
> Pigtails with camlocks installed for easy swap; investigate possibility to
> land generator on the emergency service board to give the site N+1 with a
> manual ability to choose anyone. (08:00 CT)
> check small power plants on floors 4 and 6 (08:00 CT)
> Investigate water damage on 1st floor and energize if safe (08:00 CT
> Air handlers for floors 4,5 and 6 (09:00 CT)
> complete all transport work
> Turn up SS7
> Turn up 911 service - Approximately noon or after)
> Turn up switching service.
> TDM Switching team will reconvene at 09:00 CT and the Signaling team will
> reconvene at 11:00 CT on 12/27/2020.
> DMS equipment on the 1st floor will be assessed for water damage. Switching
> teams will monitor power and HVAC restoration and will begin switch
> restoration as soon as the go ahead is provided by the power team.
> 
> Recovery Priorities:
> 1. 4th & 5th floors (Specify transport equipment needed to clear MTSO SS7
> isolation & Datakit needed for Local Switch restoration). Transport SMEs
> currently working to turn up transport equipment
> 2. 6th floor (ESINET Groomers)
> 3. 10th and 8th floors (N4E) – Trunks
> 4. 1st floor (DMS: DS1, 5E: DS3) - Local POTS
> 5. 1st floor (DMS: DS0, DS2 | 5E: DS6) – Trunks
> 6. 11th floor (DMS: 01T) – Trunks
> 7. 4th floor (STP and SCP with mates up in Donelson)
> 
> The next update will be issued at approximately 09:00 CT on December 27.
> 
> 
> 
> Nv2
> 
> As of 09:00 CT: Teams worked through the night to restore service and
> improve conditions at the Nashville 2nd Ave Central Office. Since the
> initial service impact, over 75% of the Out of Service Mobility Sites have
> been restored. Certain call flows may be limited and should improve as
> additional restoration activities complete.
> The generator that is currently powering equipment on the 2nd and 3rd
> floor, was refueled and ran with no issues through the night. Overnight,
> the batteries connected to it, continued to charge. Teams have placed
> additional power cables, which once connected, will allow the working
> generator, to better handle the load in the building. In order to
> accomplish this, the generator will need to be shut down for 15-30 minutes
> this morning, so teams can connect the new cables to the system. The power
> team reports they are still on target to restore power and cooling to the
> 5th and 6th floor by approximately 12:00 CT. Also, a portable chiller will
> be delivered this morning and strategically placed, in case it is needed to
> assist in cooling the office.
> 
> There is a Call Center at 333 Commerce, in Nashville that does not have
> network or phone services available. Corporate Real Estate (CRE) reports
> there is some damage to that office, but the extent of the damage will not
> be known until they can gain access to the site. Because of this, the
> impacted Call Center ceased operations until further notice.
> 
> DMS switching equipment on the 1st floor will be assessed for water damage.
> Switching teams will monitor power and HVAC restoration. Equipment power
> ups will begin, as soon as the go ahead is provided by the power team.
> 
> Two SatCOLTs remain positioned on the East and West sides of the NSVLTNMT
> Central Office providing critical communication for teams working
> restoration efforts. There are 17 assets deployed in the field- 15 are on
> air (the 2 at the CO and 13 supporting FN Customer Requests) and 2 are in
> hot-standby for FN Customers where macro service recently recovered. There
> is 1 asset staged at a deployment site in KY where macro service restored,
> and 8 additional assets are on route to Nashville today to fulfill pending
> FN Customer requests. Incoming requests continue to be triaged. The ones in
> areas where service looks to have been restored, are being held, while the
> others are being prioritized to be dispatched upon.
> 
> The next update will be issued at approximately 14:00 CT, unless there is a
> significant change in status.
> 
> 
> 
> Nv3
> 
> AT&T Nashville update below, received at 3:35PM 12/27.
> 
> Since the initial service impact, over 95% of the Out of Service Mobility
> Sites have been restored. Certain call flows may be limited and should
> improve as additional restoration activities complete.
> 
> Electricians have installed the additional power cables from the generator,
> to the emergency bus. These new cables will allow the generator to support
> more of the load, of the building. The portable chiller requested, has
> arrived on-site, and is available to assist in cooling, if needed.
> Generally speaking, there are four (4) phases of restoration per floor (Air
> Handler restoral, Power restoral, Transport Equipment restoral, and
> Switch/Application Equipment restoral). Teams report that Air Handlers are
> up and running, and all power plants are on floors 2 through 7 are online.
> Given significant progress made, floors 2 through 7, are ready for
> technology turn up. Relative to Priority Transport related equipment,
> approximately 90% of the elements have been turned up on floors 2 through
> 7. The Power team is currently working on Floors 8 through 11 (N4E). The
> first floor is not accessible, at this time. Once access is granted by
> federal and local authorities, further assessment and restoration efforts
> will begin.
> 
> The generator is currently supporting approximately 50% of its capacity,
> and alternative plans are being considered to handle the full load of the
> building. Teams continue to work proactively in effort to identify
> potential issues and are actively engaged working to restore services and
> repair infrastructure.
> 
> AT&T Network Disaster Recovery (NDR) has eleven (11) SatCOLTs in service
> (TN, AL, GA). Two (2) of the eleven (11) are deployed at the Nashville, TN
> Central Office to provide coverage for the AT&T response teams as well as
> FirstNet (FN) customers. One (1) COLT is in hot-standby (TN). Six (6) COLTs
> are en-route to deployment sites in TN and AL. Three (3) COLTs are being
> demobilized in Alabama and coming back to Nashville for new assignments and
> five (5) additional COLTs are en-route to the Nashville area to support
> additional requests.
> 
> The next update will be issued at approximately 19:00 CT, unless there is a
> significant change in status.
> 
> 
> 
> On Mon, Dec 28, 2020, 5:59 PM Sean Donelan <sean at donelan.com> wrote:
> 
>>
>> AT&T statement says nearly all services have been restore in Nashville as
>> of Monday, 5pm CST
>>
>> They are working on permanent repairs.
>>
>> https://about.att.com/pages/disaster_relief/nashville.html
>>
>>
>> AT&T's Network Disaster Recovery group faces management questions nearly
>> every year to justifying their budget. While no one wants disasters,
>> business continuity has to be part of the business.  There are also mutual
>> aid agreements between companies, but I don't know how many were invoked
>> for this incident.
>>
>>
>> https://about.att.com/ecms/dam/pages/disaster_relief/NDR_edited_04.22.19.pdf

-- 
Jay R. Ashworth                  Baylink                       jra at baylink.com
Designer                     The Things I Think                       RFC 2100
Ashworth & Associates       http://www.bcp38.info          2000 Land Rover DII
St Petersburg FL USA      BCP38: Ask For It By Name!           +1 727 647 1274