VLAN Wireless Network stops respond to broadcast requests after some time
VLAN Wireless Network stops respond to broadcast requests after some time
Greetings 👋
Setup:
Router: Zyxel Keenetic
Switch: Umanaged TP-Link TL-SG1016D
Controller: Self-hosted Omada Controller v4.2.4
AP: TP-Link EAP 225 v3
2 subnets on Router:
- Home Network (default, 192.168.1.0/26, VLAN 1, VLAN Acess 4 Port)
- IOT Network (192.168.2.0/25, VLAN 10, VLAN Trunk 4 Port)
2 wireless networks on Omada Controller:
- Home Network. 2.4 GHz + 5 GHz, WPA2/3, Rate Control, default VLAN (no configured VLAN).
- IOT Network. No SSID broadcast, 2.4 GHz, WPA2, No Rate Control, VLAN 10)
Devices connected to IOT Network via AP(s):
- Multiple ESP8266
- Smart Bulbs
- Multiple Air Conditioners (AC)
Issue
After some time (4-30 hours), all devices connected to WiFi IOT network stop respond on brodcast requests. Confirmed via running wireshark on router.
- ARP. No response.
- mDNS. No response.
- ICMP (ping). Response if source has mac address in ARP table.
Broadcast packets between devices inside IOT subnet connected via switch go without any problems.
Did try:
- Source Device <-> AP Wifi "IOT Network"
- Source Device <-> Switch
- Source Device <-> AP WiFi "Home Network" (devices don't respond to router ARP packets as well)
Example (Wireshark dump):
on 192.168.2.27 running `ping 192.168.2.10`
Curious thing is router (192.168.2.1) did respond on ARP from AC (192.168.2.10).
What doesn't help:
- Reboot switch.
- Reboot router.
- Connect AP directly to router.
What helps for short time in some cases:
- Reconnect unavailable devices.
- Reboot unavailable devices.
What helps:
- Reboot AP(s).
Topology
Any ideas?
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Dear @Leonarit,
I've the same setup as you but only with 1 one AP and today i experienced the same behavior, for no apparent reason i lost the ability to print from wifi, after same debug i noticed that the clients connected to the same SSID weren't able to discover the printer (No ARP response, mDNS from the printer), but with an PC on the lan i was able to ping the printer, even after flushing the arp table from the pc was able to discover the printer, but despite having arp responses i wasn't getting mDNS traffic from the printer, rebooted the printer same behavior, after restarting the AP arp/mDNS started to work for the printer for all the clients(WLAN/LAN).
May I know the model number of your EAP? Is it EAP225 V3?
Is the Airtime Fairness function enabled on the Omada Controller?
If you disable the Airtime Fairness, would the issue still exist?
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