Hello,
I can't seem to find decent information regarding this.
DNAC can provision the underlay network, but i find no details on how it does so.
Suppose i have a 3-level campus network: Access, Distribution, Core and Border nodes.
The underlay deployed is a routed access network.
1) By default, DNAC deploys an IS-IS underlay. Is this IS-IS underlay a single area network ?
I find it funny that Cisco itself recommends multi-area networks in the Routed Access design guides (with distributions in seperate OSPF areas, to limit LSA propagation), but then would deploy a full 3-level underlay network as a single area ??
2) With no summarization at Distribution level, only at Border Level ?
3) When DNAC provisions the underlay, what exactly is it expecting regarding connectivity ?
* is it expecting that the distribution switches are interconnected ?
* is it expecting that the core switches are interconnected ?
* or both ?
* Are these obligations or not ? Must they be interconnected or -may- they be interconnected ?
4) Up to what size is supported ? 3 distribution pairs ? 10 distribution pairs ? 50 distribution pairs. There must be some limit ? I am only talking about the underlay. I am not (yet) looking at the overlay enduser limits.
