#clat — Public Fediverse posts

It seems to me, that Microsoft has #clat better implemented than NetworkManager.

In my test NM reduced the outgoing MTU to 1280 while windows uses the full available MTU.

#ipv6 #ipv6only #ipv4rip #464xlat

At the brink of #CLAT on the desktop, this allows for #IPv6mostly access networks.

But on the other hand it will mask over #IPv6 issues as there is the Legacy IP fall back.

How do you think about this?

#clat #windows

https://m.youtube.com/watch?v=N9VYulg3aNg

#Windows #clat #ipv6only #ipv6mostly #ipv6 #ipv4 #internet #microsoft #preview #blog

now in public preview

https://techcommunity.microsoft.com/blog/networkingblog/announcing-windows-clat-public-preview/4506046

Irgendwer hat von irgendeinem irgendwann mal falsch abgeschrieben. Oder RFC 6877 ist einfach missverständlich?

#itadmininistrator
#juniper
#microsoft ?

#clat

Und das bei einem 13 Jahre alten RFC.

#ipv4rip

https://www.juniper.net/documentation/de/de/software/junos/interfaces-next-gen-services/topics/concept/nat-464xlat-usf.html
https://www.juniper.net/documentation/us/en/software/junos/interfaces-next-gen-services/topics/concept/nat-464xlat-usf.html

#ipv6 #ipv4rip #ipv4 #clat #windows #464xlat #ipv6mostly #ipv6only #ripe92

slide 13/14/15 by Wilhelm Boeddinghaus

https://pretalx.ripe.net/media/ripe-92/submissions/XJWGCT/resources/RIPE92-May-2026-IPv6_MmzPXy4.pdf

now corrected by Microsoft as promised two weeks ago

It is still a experimental version, not released yet. (Build 29599.1000 )

(now you can use several windows hosts in one network segment with clat)

@alexhaydock #CLAT needs SLAAC or DHCPv6-PD for the host as it needs to generate CLAT source address(es).

So if you set a static address and have no SLAAC in RAs than it will not work.

If SLAAC is available one should be able to obtain a CLAT address in addition to the static configured.

https://datatracker.ietf.org/doc/draft-ietf-v6ops-claton/

Want to help testing #CLAT on Linux and run #networkmanager?

Please tryout:
https://ipv6-pod.info/2026-02/network-manager-clat.html

#IPv6only #IPv6 #464XLAT

Some statements won't be true anymore within the next three weeks. 🤗

https://pretalx.ripe.net/media/ripe-92/submissions/XJWGCT/resources/RIPE92-May-2026-IPv6_KbCCKtH.pdf

Microsoft announced fixes for their #clat implementation 👍

"We should have a build available to test within 2-3 weeks".

#ipv6only #ipv6 #ripe92

I occupied *the* windows #CLAT address.

#ripe92
#ipv6mostly #windows

@kasperd

DAD works, but nothing more.

Or in other words: At the moment it is not possible to use more than one Windows-PC with IPv6-mostly-support (Preview only ) in a IPv6-mostly or IPv6-only Network.

By accident a host may use one of the other mapped IPv4 addresses (out of 192.0.0.0/29) . But in general it takes the first one anywhere.

and W.B. is right: MS has to fix that problem before it gets released for the masses

#ipv6mostly #ipv6only #ipv6 #clat #windowspreview

Falls jemand in München und Umgebung (habe d-ticket) einen Rechner mit dem Betakanal des Windows-Insider-Programm am Laufen hat, ich wäre über einen CLAT Test (via WLAN) mit zwei Rechnern sehr erfreut. Ein mobiler IPv6-mostly Hotspot und mein Rechner stehen zur Verfügung.
Bitte privat antworten.

#windows11 #clat #ipv6 #ipv6mostly #ipv6only

Nach dem Vortrag von Wilhelm Boeddinghaus zu CLAT für Windows auf dem Berliner Adminstammtisch stellt sich mir jetzt die Frage, wo nehme ich 9 Windows11-Kisten mit aktivierten Beta-Insider-Preview her?

#ipv6only #ipv6 #clat #windows11

After the talk by Wilhelm Boeddinghaus about CLAT for Windows at the Berliner Admin Stammtisch I am wondering how to get 9 windows 11 boxes with beta-insider-preview?

It seems to me, they need more testers.

https://techcommunity.microsoft.com/blog/networkingblog/windows-clat-enters-private-preview-a-milestone-for-ipv6-adoption/4459534

#ipv6 #ipv4rip #ipv4# #clat #464xlat
#ipv6only #ipv6mostly

Tested the #clat implementation of NetworkManager, there seems to be a issue when multiple interfaces are up and connected, but otherwise it's working quite well:
https://gitlab.freedesktop.org/NetworkManager/NetworkManager/-/merge_requests/2107

#ipv6

Looks like Microsoft is making a little more progress on a CLAT for windows.

https://techcommunity.microsoft.com/blog/networkingblog/windows-clat-enters-private-preview-a-milestone-for-ipv6-adoption/4459534

#ipv6 #microsoft #ipv4 #clat

Windows #CLAT Enters Private Preview: A Milestone for #IPv6 Adoption
https://techcommunity.microsoft.com/blog/networkingblog/windows-clat-enters-private-preview-a-milestone-for-ipv6-adoption/4459534

Windows CLAT Enters Private Preview: A Milestone for IPv6 Adoption

https://techcommunity.microsoft.com/blog/NetworkingBlog/windows-clat-enters-private-preview-a-milestone-for-ipv6-adoption/4459534

#IPv6 #CLAT #windows11

This draft has now been officially adopted by the v6ops IETF working group and renamed to:
draft-ietf-v6ops-6mops

https://datatracker.ietf.org/doc/draft-ietf-v6ops-6mops/

Also, a related 464XLAT / CLAT draft to keep an eye on:
https://datatracker.ietf.org/doc/draft-ietf-v6ops-claton/

#IPv6 #IPv6Mostly #CLAT

I opted to test Windows 11 24H2 for my company. Good news, Wi-Fi 7 works great. I’m connected to my U7-Pro at 5.8 Gbps — not that that will get me too far with the AP connected with 2.5GBaseT and 1 Gbps Internet (download, a pathetic 0.035 Gbps upload over DOCSIS). But hey, it looks nice.

Bad news, @jima and @paulos: the promised “future version of Windows 11” with CLAT support isn’t this one. Windows 11 still insists on using legacy IP despite me shoving DHCPv4 option 108 down its throat.

#Windows #Win11 #Windows11 #24H2 #IPv6 #LegacyIP #IPv6mostly #IPv6only #464XLAT #CLAT #UniFi #WiFi7 #sysadmin #EarlyAdopter

ipv4only.arpa 💀 ?

PREF64

https://datatracker.ietf.org/doc/draft-buraglio-deprecate7050/

#clat
#464xlat
#ipv6only