today I want to tell you how to create a redundant point-to-point connection with Aruba 387 access points.
Let’s look at the background
The customer has 2 warehouses which are about 150 meters apart and connected by WLAN. The previous WLAN solution manages the redundancy with cold standby devices. Unfortunately the problem was that there is no IT staff at this location to connect the backup APs in case of failure.
We have 2 Aruba 2930 24G PoE switches in the VSF stack on each side. One AP 387 is connected to each stack member. The access points are in standalone mode and form a point to point connection in pairs. AP01 + AP03 and AP02 + AP04. To prevent a switching loop, one of the two connections is switched off via Spannig Tree.
Since the article is more about the point-to-point connection, I will only roughly describe the switch configuration.
Build the stacks, activate Spanning Tree on the switches. Configure the switch facing the Internet (SW-Stack-01) as STP root. Otherwise, configure the typical switch configuration such as management IP, management user and password, etc.
The APs are all connected to SW-Stack-01. Alternatively you can also use a lan cable between SW-Stack-01 and SW-Stack-02. Convert all APs to standalone access points (no IAP cluster). Assign a fixed IP, gateway and DNS address on all APs.
Do the following on all APs:
Edit the Access Point profile
Now reboot all APs.
Configure the mesh links
After the reboot we continue on the shell.
If you can’t access it via SSH, you can also do the steps via the Com Port of the AP.
link between AP01 and AP03
Perform the following configuration on AP01 and AP03
no mesh-disable mesh-cluster-name Link-A mesh-cluster-key MyPassword123
link between AP02 and AP04
On AP02 and AP04 the configuration is almost identical. Only a different mesh cluster name and mesh key is used.
Turn AP03 and AP04 into mesh points
The following steps must be performed on AP03 and AP04.
Then connect AP03 and AP04 to switch SW-Stack-02. Or remove the LAN cable between SW-Stack-01 and SW-Stack-02 if you have connected both switches for a test setup.
checking the result
The mesh is not visible in the Web GUI.
show ap mesh cluster status
show ap mesh cluster topology
show ap mesh link
During a failover test with this configuration I had 0 to 1 ping drop out during a continuous ping
Have a nice day!