Looking for some input on whether layer 2 or layer 3 would be a better design choice for a network that has 4 buildings connected by mm fiber runs and probably 500-600 phones, some analog but most ly IP phones. You know, its not a massive site so I don't want to over-complicate it, but I also don't want tons of broadcasts to bring down the whole network. Is it feasible to use all layer 2 and use port channels to trunk the VLANs between the separate buildings? Or would you rather have a router per building running its own layer 3 network with OSPF to link them all up.
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