Pod IP Assignment IPAM without CNI

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Cluster information:

Kubernetes version: v1.32.1
Cloud being used: (put bare-metal if not on a public cloud) Playgroud
Installation method:
Host OS:
CNI and version: NA
CRI and version:

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I am trying to see the behavior of the K8s cluster without CNI and how IPs are assigned without CNI. I deleted calico/canal pods and deleted files in directory /etc/cni/net.d/ now nodes are in Not Ready state, why is it so? Cannot a cluster be up and running without CNI ?

Thanks,

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2

Pretty sure that the answer is “no”.

As part of its operation, a CNI plugin is expected to assign (and maintain) an IP address to the interface and install any necessary routes relevant for that interface.

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