AT&T does not see it differently, the deal with IBM is a cover for outsourcing thousands of employees without drawing attention to it.
Internally ATT has been using RHEL as the default OS for almost every system build, but drifting towards Ubuntu, this may change back to RHEL.
They've built most of AIC on top of Mirantis, they enhanced helm with airship and open sourced it for k8s management so I don't see them jumping on Open Shift anytime soon either.
The deal with MS is where they be shifting most of their actual workloads to that go cloud, IBM will be running the stuff that's left behind in legacy AT&T data centers. IBM will not be touching any of the actual network/SDWAN stuff.
Internally ATT has been using RHEL as the default OS for almost every system build, but drifting towards Ubuntu, this may change back to RHEL.
They've built most of AIC on top of Mirantis, they enhanced helm with airship and open sourced it for k8s management so I don't see them jumping on Open Shift anytime soon either.
The deal with MS is where they be shifting most of their actual workloads to that go cloud, IBM will be running the stuff that's left behind in legacy AT&T data centers. IBM will not be touching any of the actual network/SDWAN stuff.
Edit: Am AT&T IT employee