Monitored Host

Products Enterprise Wi-Fi Networks
1

I am seeing radios disabling their WLAN where I have set up Monitored Host.

Pretty sure its not doing what its supposed to.

What I am expecting is for the AP to send pings to a target on an interval I SET.

Then it should not take action until a threshold is met.

Like here is how I think its supposed to work.
Ping host. On INTERVAL. Here it would be 60 seconds.
Attempts I would guess relates to HOW MANY FAILURES IN A ROW before shutting down the WLAN.

So if I were to set these parameters to 60 and 5.
I would expect 5 CONTINUOUS minutes of missed pings.
At the 6th minute where the host didn’t ping. THEN I WOULD EXPECT THE RADIO TO DISABLE.

This doesn’t seem to be the case at all…
Here is what my router sees.

09:17:53 firewall,info Monitored Host forward: in:bridge out:ether1-WAN1, connection-state:new src-mac b4:a2:5c:e8:99:7c, proto ICMP (type 8, code 0), 192.168.101.252->96.xxx.xxx.xx8, len 84
09:17:53 firewall,info Monitored Host forward: in:bridge out:ether1-WAN1, connection-state:new src-mac b4:a2:5c:e8:99:7c, proto ICMP (type 8, code 0), 192.168.101.252->96.xxx.xxx.xx8, len 84
09:17:54 firewall,info Monitored Host forward: in:bridge out:ether1-WAN1, connection-state:established,snat src-mac b4:a2:5c:e8:99:7c, proto ICMP (type 8, code 0), 192.168.101.252->96.xxx.xxx.xx8, NAT (192.168.101.252->96.xxx.xxx.xx4)->96.xxx.xxx.xx8, len 84
09:17:54 firewall,info Monitored Host forward: in:bridge out:ether1-WAN1, connection-state:established,snat src-mac b4:a2:5c:e8:99:7c, proto ICMP (type 8, code 0), 192.168.101.252->96.xxx.xxx.xx8, NAT (192.168.101.252->96.xxx.xxx.xx4)->96.xxx.xxx.xx8, len 84
09:17:55 firewall,info Monitored Host forward: in:bridge out:ether1-WAN1, connection-state:established,snat src-mac b4:a2:5c:e8:99:7c, proto ICMP (type 8, code 0), 192.168.101.252->96.xxx.xxx.xx8, NAT (192.168.101.252->96.xxx.xxx.xx4)->96.xxx.xxx.xx8, len 84
09:17:55 firewall,info Monitored Host forward: in:bridge out:ether1-WAN1, connection-state:established,snat src-mac b4:a2:5c:e8:99:7c, proto ICMP (type 8, code 0), 192.168.101.252->96.xxx.xxx.xx8, NAT (192.168.101.252->96.xxx.xxx.xx4)->96.xxx.xxx.xx8, len 84
09:17:56 firewall,info Monitored Host forward: in:bridge out:ether1-WAN1, connection-state:established,snat src-mac b4:a2:5c:e8:99:7c, proto ICMP (type 8, code 0), 192.168.101.252->96.xxx.xxx.xx8, NAT (192.168.101.252->96.xxx.xxx.xx4)->96.xxx.xxx.xx8, len 84
09:17:56 firewall,info Monitored Host forward: in:bridge out:ether1-WAN1, connection-state:established,snat src-mac b4:a2:5c:e8:99:7c, proto ICMP (type 8, code 0), 192.168.101.252->96.xxx.xxx.xx8, NAT (192.168.101.252->96.xxx.xxx.xx4)->96.xxx.xxx.xx8, len 84
09:17:57 firewall,info Monitored Host forward: in:bridge out:ether1-WAN1, connection-state:established,snat src-mac b4:a2:5c:e8:99:7c, proto ICMP (type 8, code 0), 192.168.101.252->96.xxx.xxx.xx8, NAT (192.168.101.252->96.xxx.xxx.xx4)->96.xxx.xxx.xx8, len 84
09:17:57 firewall,info Monitored Host forward: in:bridge out:ether1-WAN1, connection-state:established,snat src-mac b4:a2:5c:e8:99:7c, proto ICMP (type 8, code 0), 192.168.101.252->96.xxx.xxx.xx8, NAT (192.168.101.252->96.xxx.xxx.xx4)->96.xxx.xxx.xx8, len 84

So I am guessing my idea of how this works is wrong.

Could someone explain what exactly its supposed to do and when. Then I can make parameters that fit my needs

Screenshot 2023-11-23 09.27.57
Screenshot 2023-11-23 09.27.57959×230 13.7 KB

2

Monitored Host parameter explanation :

Host => IP Address or hostname that should be reachable for this WLAN to be active

Interval (Duration in Seconds) => Its an Interval in seconds where device (AP) will check the reachability of the IPaddress/hostname mentioned in the “Host” Section at regular interval

Attempts (1-20) => Its a number of attempts via ping to check the reachability of monitored host configured.

For Example :
If somebody set the monitored host parameter as follow :’

Host : 8.8.8.8
Interval : 60 seconds
Attempts : 5

Now Device Behavior will like this :

  • At an interval of every 60 seconds (1 minute) Device will check the reachability of the host 8.8.8.8 via ping request/reply

  • Number of Ping request = Number of attempts configured

  • Now Device will send 5 ping request (Attempts) at an interval of 1 seconds and verify the reachability by the reply message

  • If got the reply from host it will mark host is reachable and WLAN will be in Up state

  • Scenario 1 : Host reachable

  • If host is reachable it will again wait for 60 seconds and then repeat the above process in loop until host is reachable

  • Scenario 2: Host become unreachable

  • If host is unreachable then it will make the WLAN down immediately after attempting the 5 ping request for reachability check

  • Since host is unreachable so device will not receive any reply from host, therefore immediately after attempting the 5 ping check it will make WLAN down

  • Device will keep check the host reachability after making the WLAN down , but the duration or interval this time will be half of the configured value in Interval section

  • Now at an interval of every 30 seconds it will check the Host reachability

  • NOTE : Once Host become reachable, device will follow the scenario 1 again

3

What is the fail threshold?
What is the timeout length?

All 5 pings need to make it?