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On some devices, a routed L3 interface may require less hardware resources (from TCAM) than a VLAN plus SVI. A routed port can enable you to re-use the same VLAN ID from another L3 port or from an L2 VLAN without any risk of L2 traffic in between. A routed port may be easier to manage by an admin, especially with ECMP or similar (no need to twiddle with MSTP ...

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