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What is Layer 3 (L3) roaming?

April 26, 2017l3 Roaming

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What is Layer 3 (L3) roaming?

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A. With Layer 2 (L2) roaming, the wireless client roams between two APs that are part of the same subnetwork on the wired side. AP-based WDS provides this functionality. With AP-based WDS, you must configure the APs to be in the same VLAN. With L3 roaming, the wireless client roams between two APs that reside in two different subnetworks. Therefore, the client roams between two different VLANs on the wired side. This removes the creation of VLANs that span the entire campus, which the AP-based WDS create. Client devices use multipoint generic routing encapsulation (mGRE) tunnels in order to roam to APs that reside on different L3 subnetworks. The roaming clients remain connected to your network without the need to change IP addresses.