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IGP interaction
Shouldn’t require a single IGP between distinct sites.
Even if an IGP is running between all sites it may not be able to compare inter-site metrics (Provider assigned) and intra-site.
Perform implicit “next-hop self” on the PE/RR
when advertising to CE.
when advertising to other PEs.
PE/RR makes decisions by taking inter-cluster metrics always higher than intra-cluster.
PPT Version