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Definition
| An amendment to the 802.11 standard that defines a method of assisted roaming, as part of “Radio Resource Management.” |
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| An amendment to the 802.11 standard that defines a method of fast BSS transition (FT). Clients capable of FT associate normally and then can reassociate very quickly by using a special FT 4-way handshake during the authentication and reassociation exchanges with subsequent APs. |
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Definition
| An amendment to the 802.11 standard that defines methods of BSS transition, as part of “Wireless Network Management.” |
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| The original controller a client was associated with before a Layer 3 inter-controller roam occurs. |
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| A fresh wireless connection between a client and an AP. |
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| Cisco Centralized Key Management is a proprietary fast secure roaming method. |
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Definition
| The current controller a client is associated with after a Layer 3 inter-controller roam occurs. Traffic is tunneled from this back to an anchor controller so that the client retains connectivity to its original VLAN and subnet. |
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| Client roaming that occurs between two APs that are joined to two different controllers. |
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Definition
| Client roaming that occurs between two APs joined to the same controller. |
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| An inter-controller roam where the WLANs of the two controllers are configured for the same IP subnet. |
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Definition
| An inter-controller roam where the WLANs of the two controllers are configured for different IP subnets. To support the roaming client, a tunnel is built between the controllers so that client data can pass between the client’s current controller and its original controller. |
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Definition
| A logical grouping of all mobility groups within an enterprise. |
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Definition
| A logical grouping of one or more controllers between which efficient roaming is expected. |
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Term
| Opportunistic Key Caching (OKC) |
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Definition
| A fast, secure roaming method that caches the PMK for the lifetime of the client and shares it across all APs on the same controller. |
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Term
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Definition
| A fast, secure roaming method introduced in 802.11i that caches the pairwise master key (PMK) identifier to improve roaming efficiency. |
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Term
| point of attachment (POA) |
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Definition
| The controller that anchors a client’s IP address for Layer 3 roaming. |
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Definition
| The controller where a client is currently associated. |
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Definition
| A fast, secure roaming method introduced in 802.11i that preauthenticates a client by sharing its PMK across neighboring APs after it associates with one. Cisco WLCs and APs do not support this. |
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| proactive key caching (PKC) |
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Definition
| A roaming action, where a wireless client moves its association from one AP to another. |
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