Controller Based WLANs

How to configure AP-225 for Link Aggregation?

by on ‎07-16-2014 05:47 AM

AP 225 support for Link Aggregation is introduced from AOS 6.3.1. This helps in using of both the uplinks of AP 225 in sending traffic to the controller.

 

one uplink will be used for a radio. That is Eth0 for 5GHz radio and Eth1 for 2.4Ghz radio.

 

 

rtaImage.png

 

Network Topology : The architecture of the solution.

 

rtaImage (1).png

 

To enable this configuration, in the AP system profile a new parameter called "GRE Striping IP" has to be configured. This has to be LMS IP +1.

 

  • AP-225 creates a different GRE tunnel for each VAP
  • A single IP address is assigned to the AP and used for the AP termination endpoint for all GRE tunnels between the AP and the controller
  • Two consecutive IP addresses (X and X+1) are assigned to the controller so that alternate IP addresses can be used for different GRE tunnels between the AP and the controller
  • In the existing AP-225 implementation, controller IP address X is assigned to all tunnels corresponding to the VAPs on the 5G radio, while controller IP address X+1 is assigned to all tunnels corresponding to the VAPs on the 2.4G radio
  • This ensures traffic from the controller to the AP will have different source IP addresses in the outer IP header based on the destination radio interface
  • The Ethernet switch can be configured to perform Etherchannel load-balancing based on source IP
  • All 5G traffic will be distributed to Enet 0, while all 2.4G traffic will be distributed to Enet 1
  • This will allow AP225 to achieve > 1Gbps throughput in both upstream and downstream directions.

 

Ensure that IP address based load balancing is enabled for all LAGs from AP to controller.

 

 

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