Wireless Access

Hi everyone,

I'm currently experiencing an issue with several Aruba sensors in our environment that periodically report "Gateway is unreachable" under sensor health in Aruba Central. I have about 7 sensors that report this intermittently.

Here's what I've done so far:

• I can ping the default gateway from other devices on the same subnet with no issues.

• I verified that there are no duplicate IP addresses for these sensors or the gateway.

• The APs are close and signal is strong, and these sensors are connected wireless.

• This issue is not constant but appears randomly and temporarily.

Has anyone run into similar behavior?
Some questions I'd like help with:

1. What are the best ways to confirm the gateway reachability from the sensor's perspective?

2. Could this be related to network latency, DHCP renewal issues, or ARP cache?

3. Any Aruba Central logs or CLI tools on the sensor/AP that can help dig deeper into this issue?

4. Is this something that can be safely ignored if the rest of the sensor function is fine?

Appreciate any insights or experience you might have with this!

Thanks,

What version of AOS?  Is the sensor testing multiple WLANs?

Could you clarify what you mean by "What version of AOS?" - are you asking about the Aruba Operating System version running on your devices or something else? Six sensors are testing only one SSID, and one is testing two SSIDs.

What version of AOS are you running on your WLAN hardware?

They running version 10.7.1.1_92045

You are possibly running into an issue that is fixed in the next release of AOS 10.  The behavior of the UXI sensor is triggering an ARP spoof detection in AOS 10 which is showing intermittently on the sensor as an unreachable gateway.