For all Canadians, it's difficult to understand how a scheduled upgrade could cause such a massive failure of Rogers' network. Normally one would expect the upgrade to be tested extensively and deployed in a sandbox test environment. In fact, when Mr. McKenzie was responding to MP Kram, he indicated that this was done.
I want to dive a little deeper. Did you use both Cisco and Juniper in the sandbox test or only one of those manufacturers' products? How will you ensure future sandbox testing will have greater rigour and resilience?