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Separation of CAPWAP Control and Data Plane : draft- zhang - opsawg - capwap - cds -00

Separation of CAPWAP Control and Data Plane : draft- zhang - opsawg - capwap - cds -00. What is the problem. Access Controller (aka WLC). CAPWAP used widely in WLAN deployments Two modes Local MAC mode Split MAC mode Mainly interested in Split MAC mode

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Separation of CAPWAP Control and Data Plane : draft- zhang - opsawg - capwap - cds -00

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  1. Separation of CAPWAP Control and Data Plane:draft-zhang-opsawg-capwap-cds-00

  2. What is the problem Access Controller (aka WLC) • CAPWAP used widely in WLAN deployments • Two modes Local MAC mode Split MAC mode • Mainly interested in Split MAC mode • CAPWAP assumes control and data plane are co-located on the Access Controller • No mechanism to specify different IP address for data tunnel to carry user traffic No way to split CP and DP in Split-MAC mode Control Channel Data Channel Locally bridged traffic WTP(Wi-Fi AP) Local MAC Mode Access Controller (aka WLC) Control Channel Data Channel WTP(Wi-Fi AP) Split MAC Mode

  3. Proposed Solution • Split AC (access controller) into two parts AC-CP (Control Plane) AC-DP (Data Plane) • WTP created two sets of tunnels Control and Data Channel to AC-CP Data Channel to AC-DP • AC-CP handles CAPWAP Control Chanel: Control/Management of AP CAPWAP Data Channel: User generated Management traffic (security, action frames, etc) • AC-DP handles CAPWAP Data Channel: User generated traffic (non –management traffic) AC-CP AC-DP Control Channel Data Channel WTP

  4. Next Steps • Adopt draft draft-zhang-opsawg-capwap-cds-00 as working group document

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