I was under the impression that they still did some of their own software defined routing, maybe at lower bandwidths? That could be an out-dated view. I do know they also buy traditional equipment from the big vendors for high-bandwidth stuff. P4 is very cool.

I was trying to point out that high-end hardware should survive a couple of days despite a data centre losing its cooling. it is designed for exactly that situation.

a typical google data center has a networking room which often will have large numbers of standard commercial networking devices. That room has extra redundancy, locked off from the cattle, etc.