IPv6 is a buggy mess

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aphocus

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#303338 2-Feb-2023 15:23

I got IPv6 enabled, and it's nothing but connection issues, I've triple checked all my router settings (mikrotik hAP ac2 with v7 firmware)

It's seems to work for 2-3 days but after that I get timeouts and some connections hang for over 4mins, making page load times god awful and system updates for Linux break.

The only thing that seems to work consistently is to disable ipv6, or restart my routers connection.

I guess this is why it's an opt-in option that's hidden from most users?

RunningMan

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#3030987 2-Feb-2023 15:34

It's not exactly a hidden option. Have seen a few reports of recent IPv6 issues though. What happens with 6.49 instead?

VygrNetworkMonkey

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#3030989 2-Feb-2023 15:38

Heya @aphocus

I've seen an issue on Mikrotiks & IPv6 with a couple of customers before.

A couple of things to check

Set IPv6 TCP-MSS Clamping to 1432 (IPv4 is 1452, but IPv6 needs another 20 bytes)
Change the Firmware (upgrade/downgrade) - there are a couple of interesting bugs out there in the 'Tik world with IPv6. 7.2.x in particular has cropped up a few times and being problematic.

I've checked in with the team and run a number of tests and we can see no issues with the IPv6 network - all lights green on the ISP side.
If you can DM me your connection details, I can look into it a bit deeper if the above doesn't resolve the issue for you.

Voyager Internet - Network Monkey

amanzi

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#3030995 2-Feb-2023 15:45

I have a Mikrotik router on Voyager and am using IPv6 without issues.

aphocus

37 posts

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#3031001 2-Feb-2023 16:18

Here's my mikrotik config: https://gist.github.com/YellowOnion/37beb17d72c6fc8a1a83b2514baf78f9

I just set ND/RA to advertise the MTU, is that the correct way to do it?

> It's not exactly a hidden option.

I only found out about it, via this forum, there's zero mention on their website of IPv6, nor requiring a support request to get it enabled, nor an option during signup. (as an aside, why is it like this? why not have it enabled by default, unless it's only in "beta" testing?)

> Change the Firmware (upgrade/downgrade)

I'm stubbornly holding out as fq_codel/cake is too good to downgrade to v6.

RunningMan

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#3031003 2-Feb-2023 16:22

aphocus:

> It's not exactly a hidden option.

I only found out about it, via this forum, there's zero mention on their website of IPv6, nor requiring a support request to get it enabled, nor an option during signup. (as an aside, why is it like this? why not have it enabled by default, unless it's only in "beta" testing?)

Thought you were talking about IPv6 in ROS.