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Resolving scaling concerns 5K MAC/node limit in IS-IS could be solved with RFC3786 Don’t use per-VLAN (multi-instance) routing Use reachability-based MAC announcement Scaling MAC distribution requires VLAN-aware flooding: Each node and link is associated with a set of VLANs Only information needed by the remote nbr is flooded to it Not present in current IS-IS framework Forget about mobility ;-) |