Include route-override chained CNI plug-in

[jboxman]

• WIP Adds whereabouts IPAM CNI and route-override usage descriptions #20605

@dougbtv, route-override fits best as a new topic. Once this is complete, it will be included in the TOC.

Will there be additional chained CNI plug-ins? Eventually this may need to morph into more expansive content if so.

[jboxman]

@dougbtv, do we know what CNI plug-ins route-override is compatible with?

Thanks.

[jboxman]

This overlaps with declarative configurations for creating multiple networks. It might be best to do both.

[openshift-bot]

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/lifecycle stale

[jboxman]

/lifecycle frozen

[vikram-redhat]

@jboxman is this still valid? If not, can you close it?

[openshift-ci]

@jboxman: PR needs rebase.

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[jboxman]

@vikram-redhat, it's relevant to multiple networks, but the necessary background content does not exist. It's one of the focus areas for closing networking documentation gaps, yet to be realized.