I didnt say it wouldnt go down, I just said peak time load was under 1/8 of the capacity of the p-router.
You weren't saying that either ... and I'd have left that simple statement unchallenged. (*)
Instead, you were making pronouncements about how congestion-free the
network would be in the event of certain (huge) failure modes ... which aren't claims that Sky themselves make. Sky's claims are much more limited.
Capacity of one router is meaningless if it isn't fully populated to make use of the capacity. Nor if the core fibre routes can't handle that volume. Nor if there isn't a working router at the other end to receive that data and send it somewhere.
Network capacity is oh so different from router capacity. Network congestion is different from router congestion.
(*) - Perhaps even the simple statement is unlikely to still be true.
When Sky installed the new routers, the fact that the router capacity matched total traffic was happenstance: the hardware was new, with plenty of room for growth. As volumes grow (40%CAGR or more?), that happenstance disappears ... And was always likely to be rendered an obsolete observation.
Now, 18 months on, total traffic may well have doubled (judging from the estimates in the graphs earlier in the presentation). The observation likely no longer applies. It was a red herring, and never useful.