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What Are the Precautions for Deploying a Central AP?
Note the following points when deploying a central AP:
- The central AP cannot be connected to other central APs in the downstream direction.
- A Layer 2 or Layer 3 network can be deployed between the central AP and AC, and the central AP and RUs must be able to communicate at Layer 2.
- The central AP and RUs must reside on the same Layer 2 network. The PVID of the central AP's downlink interfaces is the management VLAN ID and cannot be changed. That is, the central AP's downlink interfaces join the management VLAN (mVLAN) by default and cannot be removed from the mVLAN, but they can be added to other VLANs. As such, the working mode of the interfaces must be set to middle.
- CAPWAP packets between the central AP and RUs are forwarded at Layer 2 and are independent of IP addresses. Therefore, the configuration of a static IP address does not affect the RU onboarding. Ensure that a route is reachable between the IP address of an RU and the central AP source address. Otherwise, services involving IP addresses may be affected, for example, Telnet.
- The central AP needs to report RU information to the AC before RUs go online. Therefore, the central AP must go online before RUs.
- If an RU is not added to an AP group, the RU automatically joins the AP group to which the central AP belongs.
- If a switch is deployed between the central AP and RUs, ensure that the uplink and downlink interfaces of the switch can communicate at Layer 2. In direct forwarding mode, if a 10GE central AP such as the AD9431DN-X is deployed, the uplink and downlink interfaces of the switch also need to allow packets from service VLANs to pass through.