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Single Bcast domain (CP) Total of O(1K) MAC addresses Each address: 12bit VLAN tag + 48bit MAC = 60 bits IS-IS update packing: 4 addr’s per TLV (TLV is 255B max) 20 addr’s per LSP fragment (1470B default) ~5K add’s per node (256 frags total) LSP refresh rate: 1K MACs = 50 LSPs 1h renewal = 1 update every 72 secs MAC update rate: Depends on MAC learning & dead detection procedure |