sbiddle:

 

Lias:

 

No mention of Kapiti in this, but it seems very likely it was the same outage.

 

https://www.stuff.co.nz/dominion-post/wellington/300144325/cut-cable-leaves-vodafone-customers-in-wellington-without-internet

 

What baffles me is how a cable cut impacted two suburbs out in the Hutt, Wadestown and apparently Kapiti but not other suburbs. Genuinely curious if any of our resident Chorus / Vodafone / general Telco gurus can explain.

 

 

The most obvious guess (which may or may not actually be correct answer as I know nothing more about the outager) is that customers are load balanced across multiple BNG's and that this outage affected customers connected to one of these.

 

Starting to get way out of my depth here and stretch some old Cisco classroom reading material but here goes nothing lol.

If I understand correctly, my ONT connects back to an OLT, which in turn connects back to a BNG and the BNG in turn connects to all the ISP's that have paid chorus for access, and things are tunnnelled so that the ISP is providing the DHCP lease etc? So if I understand that correctly, and your hypothesis correctly, a bunch of OLT's in widely scattered suburbs were all connected to a single BNG back in a central location (Wellington "Exchange"/POP or similar?)

I'm still struggling then to understand how a single cable cut causes the outage? Given it only impacted Vodafone customers it would almost have to be an issue between the BNG and Vodafone wouldn't it, and surely there'd carrier type equivalents of the sort of link redundancy, multiple paths, failover routing etc between that central BNG and Vodafone?