What config is needed for own router with OpenWRT TP-Link AX23?

Question

Hi everyone, I hope you don't mind me asking in English, my dutch is too basic to ask this type of questions hehe. Please be patient with me, I am relatively new to networking (want to learn) and I tried several hours before posting here, also read all documentation already but it is a bit tricky with my current dutch and networking level.

So, I installed OpenWRT on my TP-Link AX23 in order to replace my XperiaBox V10a. I was doing this as testing before buying a GL.iNet MT6000. The thing is that I followed several configurations, of my own an others I saw in the forum but non worked, which made me think if I may have skip something. Like, do I have to call KPN and tell them I am going to use my own router so it is recognized? Or is the TP-Link AX23 not compatible with my setup? Or if besides the basics configurations that KPN ask for there is something besides (like firewall or stuff like that) I should do.

My KPN setup is: GoF/ExperiaBoxV10A/FTU_GN01/KPN ONT.

I tried this configs:

config device
	option name 'eth0'
	option mtu '1508'

config device
	option type '8021q'
	option ifname 'eth0'
	option vid '6'
	option name 'eth0.6'

config interface 'wan'
	option proto 'pppoe'
	option device 'eth0.6'
	option username 'internet'
	option password 'internet'
	option mtu '1500'
	option peerdns '0'
	list dns '1.1.1.2'
	list dns '8.8.4.4'
	option ipv6 '1'
	option metric '1'

config interface 'wan6'
	option proto 'dhcpv6'
	option device 'pppoe-wan'
	option reqaddress 'try'
	option reqprefix 'auto'
	option peerdns '0'
	list dns '2606:4700:4700::1112'
	list dns '2001:4860:4860::8844'
	option metric '0'

config interface 'wan'
	option proto 'pppoe'
	option username 'internet'
	option password 'internet'
	option mtu '1500'
	option peerdns '0'
	list dns '8.8.8.8'
	list dns '8.8.4.4'
	option device 'eth3.6'
	option metric '1'
	option ipv6 '1'
	option force_link '1'

config interface 'wan6'
	option proto 'dhcpv6'
	option device 'pppoe-wan'
	option reqaddress 'try'
	option reqprefix 'auto'
	option peerdns '0'
	list dns '2001:4860:4860::8888'
	list dns '2001:4860:4860::8844'
	option metric '0'

config device
	option name 'eth3'
	option mtu6 '1512'
	option mtu '1512'

config device
	option type '8021q'
	option ifname 'eth3'
	option vid '6'
	option name 'eth3.6'
	option mtu '1508'

If this is info is not enough then I will reconfigure the TP-Link with OpenWRT again and try to get logs to share.

Thank you in advance :)

Dave van Toer · Answer

I’ve compiled a couple of things using AI to try and give you a proper answer, hopefully it’s helpful!

It looks like you’re trying to replace your KPN ExperiaBox V10A with OpenWRT on your TP-Link AX23, but it’s not working. Let’s go through the key points to troubleshoot:

1. Is the TP-Link AX23 Compatible?

• OpenWRT support for the AX23 is still in development, and VLAN handling might not work properly. If your firmware isn’t the latest snapshot or a properly patched build, that could be a problem.

• Some TP-Link devices have issues with VLAN tagging, which is required for KPN (VID 6 for internet).

2. Does KPN Need to Activate Your Router?

• No, KPN does not require activation for a new router.

• However, KPN does require VLAN tagging (VID 6 for internet and optionally VID 4 for IPTV).

3. Configuration Issues

Your config has duplicate wan and wan6 entries, which might cause conflicts. Try a cleaner setup:

config device

option name 'eth0'

option mtu '1508'

config device

option type '8021q'

option ifname 'eth0'

option vid '6'

option name 'eth0.6'

config interface 'wan'

option proto 'pppoe'

option device 'eth0.6'

option username 'internet'

option password 'internet'

option mtu '1500'

option peerdns '0'

list dns '1.1.1.1'

list dns '8.8.8.8'

option ipv6 '1'

config interface 'wan6'

option proto 'dhcpv6'

option device 'pppoe-wan'

option reqaddress 'try'

option reqprefix 'auto'

option peerdns '0'

list dns '2606:4700:4700::1111'

list dns '2001:4860:4860::8888'

4. Important Checks

1. ONT Connection: Your TP-Link AX23 should be directly connected to the KPN ONT via the WAN port.

2. VLAN Support: If the router does not properly support VLAN tagging, you may need a managed switch to handle VLAN 6 externally.

3. MTU Size: KPN Fiber needs an MTU of 1500 for PPPoE (meaning the physical interface must support at least 1508).

4. Reboot Everything: After applying the configuration, reboot both the router and the ONT.

If it still doesn’t work, check the system logs (logread) and network status (ifstatus wan) in OpenWRT.

What config is needed for own router with OpenWRT TP-Link AX23?

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