EAP670 IPv6 UDP Packet Drops

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EAP670 IPv6 UDP Packet Drops

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EAP670 IPv6 UDP Packet Drops
EAP670 IPv6 UDP Packet Drops
2022-12-15 17:09:24 - last edited 2022-12-26 06:39:39
Model: EAP670  
Hardware Version: V1
Firmware Version: 1.0.2

I am experiencing an issue with my EAP670 where IPv6 UDP traffic is being dropped when using 3 SSIDs with their own VLANs. I have tested both the latest stable firmware version and the beta firmware provided at the following link: https://community.tp-link.com/en/business/forum/topic/577390. I have used iperf3 to test UDP traffic and have found that IPv4 traffic has no issues. In an attempt to narrow down the problem to the EAP670, I tried using a Unifi AP with one SSID enabled and the UDP traffic worked as expected on that AP.

 

I was able to reproduce this issue by resetting the AP, adding 3 SSIDs, and then enabling the VLAN on one of the SSIDs. The SSID with the VLAN enabled does not seem to pass UDP IPv6 packets.

 

Here is a tcpdump from the router to to the AP:

vyos@vyos:~$ sudo tcpdump -nni eth1.20 udp port 5201
tcpdump: verbose output suppressed, use -v[v]... for full protocol decode
listening on eth1.20, link-type EN10MB (Ethernet), snapshot length 262144 bytes
00:19:11.113500 IP6 2600:4040:5d7c:3102:3542:5f52:8356:dca5.60836 > 2603:c020:4000:9301:f777:df11:fc2d:db85.5201: UDP, length 4
00:19:11.130896 IP6 2603:c020:4000:9301:f777:df11:fc2d:db85.5201 > 2600:4040:5d7c:3102:3542:5f52:8356:dca5.60836: UDP, length 4

 

Here is a tcpdump from the device to the AP:

kyle@laptop ~ > sudo tcpdump -nni en0 host 2603:c020:4000:9301:f777:df11:fc2d:db85 and udp
Password:
tcpdump: verbose output suppressed, use -v[v]... for full protocol decode
listening on en0, link-type EN10MB (Ethernet), snapshot length 524288 bytes
19:19:11.099589 IP6 2600:4040:5d7c:3102:3542:5f52:8356:dca5.60836 > 2603:c020:4000:9301:f777:df11:fc2d:db85.5201: UDP, length 4

 

It looks like the traffic from the WAN to the device is getting dropped by the AP.

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#1
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1 Accepted Solution
Re:EAP670 IPv6 UDP Packet Drops-Solution
2022-12-26 06:39:29 - last edited 2022-12-26 06:39:39

Dear @KyleM0,

 

Thank you for taking the time to report the issue in TP-Link Community!

 

The Beta firmware to fix the IPv6 related issue has just been provided in this post. Please take your time to confirm whether the Beta fixed your issue.

 

Thanks for your cooperation and patience. See you in the community soon!

>> Omada EAP Firmware Trial Available Here << *Try filtering posts on each forum by Label of [Early Access]*
Recommended Solution
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#6
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6 Reply
Re:EAP670 IPv6 UDP Packet Drops
2022-12-16 20:22:58

  @KyleM0 

 

I just opened a ticket I thought was actively being worked on regarding the dropping of ipv6 router solicitations for this model (same problem for EAP650 and contributed to the thread it was also happening with the 670).  Use the contact us at the bottom of the screen and provide this information directly to speed things up.  Use bullet points and try to explain things as clear as possible as there is a language barrier (at least to some extent).  Expecially on how to recreate the problem.  That's my experience.

APs: EAP225v3, EAP245v3, EAP670, Controller: Linux, Primary Switch: T2600-28TS, Routing: OPNsense
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#2
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Re:EAP670 IPv6 UDP Packet Drops
2022-12-17 00:25:58

  @GPB Thank you, I submitted an email/ticket. I also linked this thread. I can't tell if it's a firmware issue, I'm not sure why enabling VLANs would cause IPv6 UDP traffic to drop.

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#3
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Re:EAP670 IPv6 UDP Packet Drops
2022-12-17 00:46:56

  @KyleM0 

 

Probably best to report it.  I don't have ipv6 enabled on my VLANs, only my primary LAN so I wouldn't see that bug.  Likewise, I don't understand why the AP would drop specifically an ipv6 router solicitation...I do know I spent hours trying to prove it was the daemon in OPNsense until someone here posted similar findings to what I was seeing.  I never thought to test using a wired connection...hopefully they can fix it...before they sunset the device support lol.  Cheers.

APs: EAP225v3, EAP245v3, EAP670, Controller: Linux, Primary Switch: T2600-28TS, Routing: OPNsense
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#4
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Re:EAP670 IPv6 UDP Packet Drops
2022-12-19 15:49:11

For anyone that is looking for the same solution, I contacted the TP-Link support and they said they are already aware of the issue and are working on a beta soon.

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#5
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Re:EAP670 IPv6 UDP Packet Drops-Solution
2022-12-26 06:39:29 - last edited 2022-12-26 06:39:39

Dear @KyleM0,

 

Thank you for taking the time to report the issue in TP-Link Community!

 

The Beta firmware to fix the IPv6 related issue has just been provided in this post. Please take your time to confirm whether the Beta fixed your issue.

 

Thanks for your cooperation and patience. See you in the community soon!

>> Omada EAP Firmware Trial Available Here << *Try filtering posts on each forum by Label of [Early Access]*
Recommended Solution
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#6
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Re:EAP670 IPv6 UDP Packet Drops
2022-12-26 19:10:02

  @Fae Thank you for the link, I applied that beta to my AP last night and it looks like all the IPv6 tests I run are working again with VLAN enabled! I'll keep using the beta firmware and I look forward to it going stable.

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#7
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