protocol 0800 is buggy, protocol 86dd is buggy...

[fbreve]

I'm using an ASUS RT-AC86U router and the latest firmware version (384.10). This issue is not related to this firmware version, it's been happening since a long time, even on my previous RT-AC68U if I recall correctly.

My WAN connection is through DHCP, since I have a Peplink Balance One router doing Load Balancing. Whenever I enable IPv6 in passthrough mode, I get loads and loads of these messages on the system log:

Mar 26 09:21:23 kernel: net_ratelimit: 27 callbacks suppressed
Mar 26 09:21:30 kernel: net_ratelimit: 2 callbacks suppressed
Mar 26 09:21:35 kernel: net_ratelimit: 16 callbacks suppressed
Mar 26 09:21:43 kernel: net_ratelimit: 437 callbacks suppressed
Mar 26 09:21:48 kernel: net_ratelimit: 3508 callbacks suppressed
Mar 26 09:21:53 kernel: net_ratelimit: 1 callbacks suppressed
Mar 26 09:21:59 kernel: net_ratelimit: 24669 callbacks suppressed
Mar 26 09:22:04 kernel: net_ratelimit: 58701 callbacks suppressed
Mar 26 09:22:10 kernel: net_ratelimit: 737 callbacks suppressed
Mar 26 09:22:16 kernel: net_ratelimit: 15 callbacks suppressed
Mar 26 09:22:22 kernel: net_ratelimit: 28 callbacks suppressed
Mar 26 09:22:29 kernel: net_ratelimit: 5 callbacks suppressed
Mar 26 09:22:35 kernel: net_ratelimit: 174 callbacks suppressed
Mar 26 09:22:40 kernel: net_ratelimit: 1029 callbacks suppressed
Mar 26 09:22:46 kernel: net_ratelimit: 14 callbacks suppressed
Mar 26 09:22:51 kernel: net_ratelimit: 15 callbacks suppressed
Mar 26 09:22:56 kernel: net_ratelimit: 9 callbacks suppressed
Mar 26 09:23:01 kernel: net_ratelimit: 44217 callbacks suppressed
Mar 26 09:23:06 kernel: net_ratelimit: 104175 callbacks suppressed
Mar 26 09:23:12 kernel: net_ratelimit: 34246 callbacks suppressed
Mar 26 09:23:17 kernel: net_ratelimit: 49 callbacks suppressed
Mar 26 09:23:22 kernel: net_ratelimit: 145 callbacks suppressed
Mar 26 09:23:27 kernel: net_ratelimit: 1200 callbacks suppressed
Mar 26 09:23:33 kernel: net_ratelimit: 59 callbacks suppressed
Mar 26 09:23:41 kernel: net_ratelimit: 16 callbacks suppressed

If I connect through SSH and run dmesg, I get messages like these:

protocol 86dd is buggy, dev br0
net_ratelimit: 69 callbacks suppressed
protocol 0800 is buggy, dev eth0
protocol 0800 is buggy, dev br0
protocol 0800 is buggy, dev br0
protocol 0800 is buggy, dev eth0
protocol 0800 is buggy, dev eth0
protocol 0800 is buggy, dev br0
protocol 0800 is buggy, dev eth0
protocol 86dd is buggy, dev eth0
protocol 86dd is buggy, dev br0
protocol 86dd is buggy, dev br0
net_ratelimit: 1105 callbacks suppressed
protocol 0800 is buggy, dev eth0
protocol 0800 is buggy, dev br0
protocol 0800 is buggy, dev eth0
protocol 0800 is buggy, dev eth0
protocol 0800 is buggy, dev br0
protocol 0800 is buggy, dev br0
protocol 0800 is buggy, dev eth0
protocol 0800 is buggy, dev eth0
protocol 86dd is buggy, dev eth0
protocol 0800 is buggy, dev br0

I understand that 0800 is the EtherType for IPv4 and that 86dd is the EtherType for IPv6. But I can't figure out how to solve these error messages.

Besides that, both IPv4 and IPv6 connections work just fine.

Any ideas?

 

[ColinTaylor]

https://www.snbforums.com/threads/384-9_alpha-builds-testing-all-variants.54050/page-9#post-457973

 

[fbreve]

Thank you. I read through that topic, but apparently, no solution was found.

 

[L&LD]

Thank you. I read through that topic, but apparently, no solution was found.

To clarify the state of your router, does it exhibit this issue after a full reset to factory defaults?

 

[fbreve]

I didn't try a full reset to factory defaults with the current firmware which were just released.
But I tried with some earlier versions and it didn't help.

 

[EmeraldDeer]

Thank you. I read through that topic, but apparently, no solution was found.

So the following is true?

• No network devices have jumbo frames enabled
• No VLAN traffic other than PVID 1 flowing through router
• No bonded ports

 

[ColinTaylor]

Thank you. I read through that topic, but apparently, no solution was found.

Whilst there was no solution did you try to determine the cause. Have you tried disabling your load balancing?

 

[fbreve]

So the following is true?

• No network devices have jumbo frames enabled
• No VLAN traffic other than PVID 1 flowing through router
• No bonded ports

I tried leaving only one device (with jumbo frames disabled) connected to the router and the problem persisted.
I also tried enabling jumbo frames on the router, and the issue persisted.

From the Peplink router above the Asus only 'Untagged LAN' is flowing. I didn't try setting it to PVID 1. I can do it tonight.

I don't think RT-AC86U support bonded ports.

 

[fbreve]

Whilst there was no solution did you try to determine the cause. Have you tried disabling your load balancing?

Yes, but in that scenario the Asus router is handling PPPoE, so IPv6 goes to 'Native' mode and there is no issue. The issue only appears in the IPv6 'passthrough' mode.

 

[fbreve]

I just changed the Peplink LAN port where ASUS is connected from Trunk to Access, but it didn't help.
Also tried setting a specific VLAN ID (1) instead of Untagged, but it didn't help either.

 

[fbreve]

I did a factory reset with the new firmware and started configuring stuff, starting with IPv6 passthrough.
The bug kicks in whenever I enable TrendMicro stuff, like AiProtection or QoS. It was hard to diagnose because it doesn't come back to normal by just disabling TrendMicro stuff, it needs a full reboot.

Now I don't know what to do. QoS is the reason I use this router. Without QoS I may just leave it as an access point only and use only the Peplink as router.

 

[mister]

I have the problem as well and didn´t found a solution up to now. Merlin 384.13 .
I changed the WAN MTU and tried a lot of things, but I didn´t found out, which tiggers the buggy protocoll....
Did you find a solution ?

 

[fbreve]

No, I didn't.
I don't have two ISPs anymore, so now RT-AC86U is my only router and I'm using the IPv6 native mode. But if I ever use the passthrough mode, the bug is still there.

 

[cooloutac]

i get this message, and i don't even have ipv6 enabled. unless i'm not understanding, how do i check if passthrough is enabled on my ac86u? i did assume it was related to trend micro or qos as almost every bug and error message i see in syslog usually is. its crazy...

 

[maghuro]

Same issue here only when ipv6 is set to passthrough. When set to native, no error log messages