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dave2026's avatar
dave2026
Follower
Mar 01, 2026

Orbi 870 - want to enable IPv6 on LAN, but not on WLAN. How?

Want local IPv6 on Local network, but do not want IPv6 'internet connection'.

 

Why? -connectivity / time-out issues with some web pages and work apps when IPv6 enabled, and a handful of Android Apps not loading when connected thru WiFi, but want IPV6 on Local Network for Matter / Thread.

 

Set up:  BT/EE ONT box - ethernet direct into Orbi Router - using PPPOE.  (+2 x satellite on wireless backhaul).  DNS Servers programmed thru 'orbi web interface' to use Cloudflare DNS.  Most configurations left as is - IP Assignment left on Auto Config.

 

Issue - recently set up Orbi 870 as moved away from Linksys Velop.  Previously had IPv6 off since going over to EE over a year ago, couldn't configure PPPOE settings, but set up OK on Orbi.

A lot of Smart Home devices - been troublesome whenever I've tried to set up matter / thread devices previously - noted however.  Noted however - vast improvement with new Orbi Router. 

Issues with certain Web pages and work apps - changed DNS settings etc to no avail, then realised IPV6 was the issue.  Disabled IPV6 on main PC, but still issues loading when phone connected to wifi.

Turned off IPv6 and web issues resolved themselves - but now issues with matter / thread set up.

 

Much as I delve into things, never actually realised till now Matter / Thread set up needs IPv6 enabled on LAN.  This explains why as some points in the past, as my set-ups have differed, it worked fine, then hasn't worked.  (have Thread Border access thru 2 x compatible Nest Hubs)

 

Do notice some dissention online whereby some are saying you only need IPv6 for Matter set-up to obtain addresses, then can turn off - others saying on all the time - a few say not needed at all.

I find that most of the my pre-set-up devices work with IPv4 only, but can have issues.  Near impossible to set up new device.

 

Searching - it appears I need to ditch IPv6 WLAN (so no IPv6 internet) so as to stop webpage / app connectivity issues, but keep enabled on LAN.

 

How?  Anyone??  From all the suggestions I've seen online disable IPv6 WLAN and enable LAN - but can't see way of doing on Orbi web interface.  Otherwise suggestions as to set Firewall to block external IPv6 traffic - but again, not really a way of doing with Orbi.

Anything I've seen suggesting settings / configurations on how to do this seem incompatible with the Orbi web interface.

 

Or do I 'fudge' the settings - i.e. select something like 'auto config' or 'pass through', meaning the main Orbi unit won't be able to establish 'external' IPv6 connection as the settings are incorrect when plugged direct into the ONT box, but IPv6 will still be available on LAN?  Although would this cause issues with the main Orbi unit constantly trying to connect?

 

Any help / suggestions appreciated.

 

Dave

2 Replies

  • FURRYe38's avatar
    FURRYe38
    Guru - Experienced User

    Will need to leave IPv6 disabled for now on the RBR. There is a standing known issue with IPv6 currently that is being worked on and developed to get IPv6 working in FW. Not sure when the fix will be forth coming. All I know its being actively worked on currently at NG. 

     

    What you might want to try is find you a smart or managed LAN switch that has built in IPv6 protocol support. Connect it behind the RBR and connect ethernet devices to this switch for some IPv6 support on the LAN side. You could even connect the RBS to this switch as well and might help with IPv6 pass thru to the wireless devices connected at the RBS.

     

    For the most part IPv6 isnt needed by most wifi or LAN devices. Some may be specific however most should work find with out IPv6 enabled. 

    Until NG gets IPv6 fully working, you'll need to leave it disabled on the RBR for now. Nothing else we can do for now. 

  • CrimpOn's avatar
    CrimpOn
    Guru - Experienced User

    (confession:  ZERO experience with matter/thread)

     

    A brief internet search  turned up a comment that matter/thread require that all devices be on the same Layer 2 network.  Devices create their own link-local IPv6 addresses. (i.e. the primary router does not have to provide DHCPv6.)

     

    Are all of the devices on one network on the 870?  (i.e. none of them on the Guest WiFi? or the IoT WiFi?)