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?
The test questions can be tricky in wording to trigger pulling red herring answer options provided.
My recollection for IS-IS DIS was that they were generally around knowing one or more of these points:
Thanks for the responses guys.
From investigation it looks like the DIS is assigned via an election on our network.