Just wanted clarification on this question:
During my certification process I had numerous questions on IS-IS and a couple were based around the requirement of a DIS if no point-to-point is configured. I don't agree with this as I have configured IS-IS as our IGP on our 4 MX routers and have NOT configured point-to-point and it works just fine. No issues at all.....
Is point-to-point required only on level 1 systems? Or is a DIS required only on level 1 systems if point-to-point is not configured?