The Churn – Type I
Network must have multiple paths to a prefix via multiple Neighbor ASs
Network must have a single tier of RRs or Sub ASs to have Type I churn
Type I can be fixed today
Network must use “deterministic-med”
Network must follow the deployment guidelines of the RR and Confed drafts
Drafts state that “intra cluster/SubAS paths must be preferred over inter cluster/SubAS paths”
Result is that “intra” IGP metrics must ALWAYS be lower than “inter” IGP metrics