should i enable OSPF on core switch or on Edge switch?

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is there any downside enable OSPF on a core switch ? we have remote office connecting back to the HQ , just wondering i should connect to branch with OSPF on a Edge switch or a Core switch

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aboyum On

You should use the three layer-model. If it's a large remote office you may connect it til core, if not you should connect it to a distribution switch at the HQ.

You must have OSPF (or the same routing protocol) on both routers that are going to connect to each other.