IPv6 Config for UDM SE

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#3211661 27-Mar-2024 18:37

Hmm looks like it could be a combination of things with Unifi.
Couldn’t get IPv6 working at all with a DHCP wan connection.
With pppoe it works for less than a minute when the device is on the default vlan1 network.
I’ve connected my iPhone to the guest network and IPv6 seems to be working well.
I did try that with the Quic DHCP connection but that didn’t work at all.

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SanchoNZ

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#3211712 27-Mar-2024 21:53

mentalinc:

Do you have the latest firmware version?

UniFi Next-Generation Gateway Pro 3.1.16 - https://ui.com/download/software/uxg-pro

Yeah I do,

I'm going to submit a ticket as well, but the fresh set of eyes on my config has been helpful for anything I may have missed before submitting.

CYaBro

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#3211729 28-Mar-2024 00:55

SanchoNZ:
mentalinc:

Do you have the latest firmware version?

UniFi Next-Generation Gateway Pro 3.1.16 - https://ui.com/download/software/uxg-pro

Yeah I do,

I'm going to submit a ticket as well, but the fresh set of eyes on my config has been helpful for anything I may have missed before submitting.

You won’t get an ipv6 address on the router itself it seems.
Have you got any vlans?
Do you also find that it’s only the default vlan 1 that ipv6 doesn’t work?

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SanchoNZ

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#3211909 28-Mar-2024 16:28

CYaBro:
You won’t get an ipv6 address on the router itself it seems.
Have you got any vlans?
Do you also find that it’s only the default vlan 1 that ipv6 doesn’t work?

I have no VLAN's sorry. ipv6 worked instantly on my USG-Pro, but not since I changed to the UXG-Pro.

CYaBro

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#3211974 29-Mar-2024 01:00

SanchoNZ:
CYaBro:
You won’t get an ipv6 address on the router itself it seems.
Have you got any vlans?
Do you also find that it’s only the default vlan 1 that ipv6 doesn’t work?

I have no VLAN's sorry. ipv6 worked instantly on my USG-Pro, but not since I changed to the UXG-Pro.

Did you try pppoe as well?

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SanchoNZ

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#3211976 29-Mar-2024 02:02

CYaBro:

Did you try pppoe as well?

I'm going to try pppoe now, I installed the release candidate firmware for the UXG and it's given me the SLAAC option that I didn't have before which was mentioned as working earlier in the thread, so I'll try that.

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SanchoNZ

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#3211977 29-Mar-2024 02:28

switched back to PPPoE and yeah worked for a minute then stopped.

UPDATE-

setup a VLAN, put it just on one port of my switch, and after a couple of reboots it's been going for 10 minutes. devices on the default vlan also seem to have ipv6 as well. I'll check again when I wake up.

CYaBro

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#3212005 29-Mar-2024 08:53

Seems ubiquiti need to fix this.
I’ve logged a ticket with them now.

Otherwise I’ll need to move all devices off the default network.

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SanchoNZ

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#3212048 29-Mar-2024 12:52

Checking again now, and devices on both networks will pass the ipv6 test.

just if anyone reads this later and wonders

Router running the release candidate firmware, which enables SLAAC.

some vlans

and the settings that seem to work, PPPoE etc

and despite ipv6 working fine on both networks it never says the address here

I have no more ideas now but it does appear to be issues with ubiquiti not quic perhaps.

hairy1

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#3212058 29-Mar-2024 13:25

No problems here on my SE with Vodafone:

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CYaBro

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#3214122 4-Apr-2024 11:49

Update:

Unifi support did find an issue and had to manually assign the IPv6 default gateway, which won't survive IPv6 config changes or a reboot.

They took some wire captures from my SE and are going to analyse the SE -- ISP communication to see if the issue is the SE, Quic or both.

Currently I'm working on IPv6 on the default network/VLAN.

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michaelmurfy

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#3214146 4-Apr-2024 12:36

@CYaBro Question for you - as from last night, is configuration working now normally?

Quic have quietly made some IPv6 improvements overnight last night and I'm personally seeing a whole lot of improvement. Presuming you're following my configuration you shouldn't have any problems.

Also, out of interest what BNG are you on? You can find this out via the Quic portal if you look at the JSON payload. Feel free to PM me.

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Opinions are my own and not the views of my employer.

CYaBro

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#3214156 4-Apr-2024 13:38

michaelmurfy:

@CYaBro Question for you - as from last night, is configuration working now normally?

Quic have quietly made some IPv6 improvements overnight last night and I'm personally seeing a whole lot of improvement. Presuming you're following my configuration you shouldn't have any problems.

Also, out of interest what BNG are you on? You can find this out via the Quic portal if you look at the JSON payload. Feel free to PM me.

Hey, I and Unifi support have made changes on the UDM SE today but it wasn't working this morning before we started.

Still not 100%, it seems browsing has long delays sometimes and browser windows just sit there trying to connect and eventually do.
I assume this is an IPv6 issue as it only started after the changes were made by us today. 🙃

Looks like we're connected to: bng1-chc2

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Fuzzi9986

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#3214323 4-Apr-2024 20:56

michaelmurfy:

Quic have quietly made some IPv6 improvements overnight last night

I may give it a try again when home tonight to see if it starts behaving and giving me a gateway on my connection

MichaelNZ

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#3215167 6-Apr-2024 21:04

If you can get access to a Mikrotik router I am happy to offer you some guidance with that.

I work at an ISP and through we offer IPv6, it does have mixed results. This is because some CPE is not as mature as it should be. FWIW Mikrotik works effectively with IPv6, at least client side. If you can get ahold of a Mikrotik unit I suggest you try this and see how it goes.

WFH Linux Systems and Networks Engineer in the Internet industry | Specialising in Mikrotik | APNIC member | Open to job offers | ZL2NET

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