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Omada AP in standalone mode sending UDP broadcasts every 10 seconds

 
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Omada AP in standalone mode sending UDP broadcasts every 10 seconds

Omada AP in standalone mode sending UDP broadcasts every 10 seconds
Omada AP in standalone mode sending UDP broadcasts every 10 seconds
2022-09-14 21:40:51 - last edited 2022-09-15 09:28:08
Model: EAP653  
Hardware Version: V1
Firmware Version: 1.0.1

Hello,

I have deployed a standalone EAP653 to provide coverage in a location where only a single AP is needed and a controller is overkill. However since deploying, I have received complaints about reduced battery life on our wireless devices.

 

Further investigation reveals the EAP653 is sending a UDP broadcast (255.255.255.255) on port 29810 to the network every 10 seconds, causing all wireless clients to have to wake up to process the packet. This packet seems to be only for discovery by the Omada App / controller as it contains the AP information in JSON format - device name, model, firmware, uptime, etc.

 

21:36:20.130241 IP 192.168.1.133.43457 > 255.255.255.255.29810: UDP, length 742
21:36:30.260659 IP 192.168.1.133.43457 > 255.255.255.255.29810: UDP, length 742
21:36:40.380211 IP 192.168.1.133.43457 > 255.255.255.255.29810: UDP, length 742
21:36:50.510290 IP 192.168.1.133.43457 > 255.255.255.255.29810: UDP, length 743
21:37:00.660255 IP 192.168.1.133.43457 > 255.255.255.255.29810: UDP, length 742
21:37:10.810435 IP 192.168.1.133.43457 > 255.255.255.255.29810: UDP, length 741
21:37:20.940418 IP 192.168.1.133.43457 > 255.255.255.255.29810: UDP, length 742
21:37:31.050438 IP 192.168.1.133.43457 > 255.255.255.255.29810: UDP, length 742
21:37:41.190387 IP 192.168.1.133.43457 > 255.255.255.255.29810: UDP, length 742
21:37:51.330460 IP 192.168.1.133.43457 > 255.255.255.255.29810: UDP, length 741
21:38:01.451354 IP 192.168.1.133.43457 > 255.255.255.255.29810: UDP, length 743
 

Now that the AP is set up I have no need to discover it. I would like to request a way to turn off these these discovery broadcast packets to prevent unnecessary wake-ups on mobile devices and preserve battery life. Thanks.

#1
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4 Reply
Re:Omada AP in standalone mode sending UDP broadcasts every 10 seconds
2022-09-15 01:15:40 - last edited 2022-09-15 09:28:08

  @TLnet  I think you're going to have to request this as a feature for a future firmware, beta or otherwise.  @Fae Heads up.  Seems like a legitimate feature request. 

#2
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Re:Omada AP in standalone mode sending UDP broadcasts every 10 seconds
2022-09-15 08:51:57 - last edited 2022-09-15 09:28:08

  @TLnet 

can i know how you test this? the battery drain?

do you wireshark by wireless and receive this? 

i searched on the internet and don't find conclusions about broadcasting that would cause a quick battery drain. and wonder how you draw a conclusion about this?

 

request's reasonable but wonders if broadcasts would really cause a quick batter drain issue?

#3
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Re:Omada AP in standalone mode sending UDP broadcasts every 10 seconds
2022-09-15 09:27:57 - last edited 2022-09-15 09:28:08

  @TLnet, @d0ugmac1,

 

TLnet wrote

I have deployed a standalone EAP653 to provide coverage in a location where only a single AP is needed and a controller is overkill. However since deploying, I have received complaints about reduced battery life on our wireless devices.

Further investigation reveals the EAP653 is sending a UDP broadcast (255.255.255.255) on port 29810 to the network every 10 seconds, causing all wireless clients to have to wake up to process the packet. This packet seems to be only for discovery by the Omada App / controller as it contains the AP information in JSON format - device name, model, firmware, uptime, etc.

Now that the AP is set up I have no need to discover it. I would like to request a way to turn off these these discovery broadcast packets to prevent unnecessary wake-ups on mobile devices and preserve battery life. Thanks.

 

Thank you for your valuable feedback. I've reported to the developer team for evaluation.

 

Best Regards!

2022 TP-Link Wi-Fi 7 Product Launch Event | Watch the Replay at https://www.tp-link.com/us/wifi7/event/.
#4
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Re:Omada AP in standalone mode sending UDP broadcasts every 10 seconds
2022-09-15 12:17:01

@Tedd404 It's logical that that waking up devices that are otherwise in sleep mode is bad for battery life. The effects vary depending on the device and Wi-Fi chipset in use, but certainly it has an impact, especially on older devices. You can find research papers showing this, for example search "All or None? The Dilemma of Handling WiFi Broadcast Traffic in Smartphone Suspend Mode" and  "HIDE: AP-assisted Broadcast Traffic Management to Save Smartphone Energy" (not allowed to post links). I am normally very careful about what devices co-exist on a VLAN when Wi-Fi clients exist, but when the AP itself is the one doing the broadcasting I'm in a difficult position!

 

A possible workaround might be to move all clients into a separate VLAN on the AP side under the assumption that the discovery packets only get sent out over untagged interfaces, but this requires upgrading to a managed switch.

#5
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