Resolving issues with interrupted, stalled or failing MTU migrations on Openshift 4.10+

Solution Verified - Updated 2024-12-17T15:46:12+00:00 -

Issue

MTU migration was interrupted and rollover has stalled
Selected incorrect MTU values when following the documentation and now cluster is unresponsive
Rollover of MTU results in node moving to NOTREADY and never coming back online
Machine Configuration pool stalls when MTU rollover is in progress, cannot recover
Error logged in SDN pods or similar during MTU rollout

F0606 17:32:42.939063  343976 cmd.go:118] Failed to start sdn: interface MTU (1500) is too small for specified overlay MTU (8950)

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