Monday, 16 October 2017

LWAPP and CAPWAP

LWAPP: (Lightweight Access Point Protocol):
  • For communication between AP and Controller (WLC), we need this Protocol.
  • Fragmentation/Re-assembly: Relies on IpV4
  • Path-MTU Discovery: Not supported
  • Control Channel Encryption between AP and WLC: Yes (using AES)
  • Data Channel Encryption between AP and WLC: No
  • UDP Ports: 12222, 12223

CAPWAP:( Control and Provision of Wireless AP)
:
  • Build on top of LWAAP with some improvement.
  • The state machine of CAPWAP is similar to LWAPP's, but with the addition of a full Datagram Transport Layer Security (DTLS) tunnel establishment. 
  • Fragmentation/Re-assembly: CAPWAP itself does both
  • Path-MTU Discovery: Has a robust P-MTU discovery mechanism, can also detect dynamic MTU changes.
  • Control Channel Encryption between AP and WLC: Yes (Using DTLS)
  • Data Channel Encryption between AP and WLC: Yes (using DTLS)
  • UDP Ports: 5246 (ctrl) 5247 (data)

*A maximum transmission unit (MTU)

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