To allow phone to work which is best: ONT-->XT8--> SR203.... OR ONT-->SR203-->XT8

[frankNsteeen]

Getting FTTP installed. Want to keep my XT8s but also need phone line to work.

So do I allow (and will this work) my XT8 to be the main router connected to the ONT and then the SR203 picks up an IP ( or does this need to have the external IP)  just connected via patch cable allowing phone to work. 

OR

doI allow SR203 to be connected to ONT then the XT8. ( If I do this way I will need to allow XT8 to be the DHCP as have children and XT8 time scheduling is a must)

Hope that makes sense to someone who knows better or has gone this route. 

Ta.

[mae-3]

@frankNsteeen 

The only way the VoIP telephone will work is ONT->Sky router->XT8.

[cookiemonsteruk]

@frankNsteeen 

The only option is to have the sr203 attached to the ont with wifi turned and the xt8 as access point

However this means that the asus aiprotection will not work re parental control 

The asus does need to gain the public ip and control nat and dhcp

[cookiemonsteruk]

@mae-3 

Some one posted a while ago about using the sr203 behind the asus for the phone but is highly convoluted and they haven't posted an update 

[cookiemonsteruk]

@mae-3 

This is it from @Pete-da-Meat on page 13

https://helpforum.sky.com/t5/Broadband/Third-party-router-with-FTTP/td-p/3541862/page/13

[cookiemonsteruk]

@Pete-da-Meat 

Any updates ? 👍

[mae-3]

@cookiemonsteruk 

The XT8 doesn't allow a DHCPv6 PD server to run on it, the OP would require a commercial high-end router or preferable a high-end commercial firewall for doing the job, in my humble opinion... Looking at the post I'd say you need transparent IPv6 with DHCPv6 PD transparently going through the edge router/firewall.

[cookiemonsteruk]

@mae-3 

Such as

"Host a DHCPv6-PD server on a router/server, advertising a subset of your PD allocation (e.g. I used the trailing /60). I used an HPE MSR router for this (lol), but you could easily use another product such as ISC Kea or maybe pfsense."

[mae-3]

@cookiemonsteruk 

I think the poster is referring to a DHCPv6 PD relay?

[mae-3]

@cookiemonsteruk & @frankNsteeen 

From what's been stated it appears that you can place a router/firewall high-end that allows a DHCPv6 PD relay of the first /60 class addresses through it as the edge router/firewall to the inner Sky router and VoIP services will then work when connecting ONT->own router/firewall->Sky router, eg: it is quite easy but very few pieces of commercial equipment at the edge support this functionality.

[cookiemonsteruk]

@mae-3 

See, jargon is not just for Oracles. 😁👍

[mae-3]

@cookiemonsteruk 

That jargon is for the Google search engine for anyone to have Sky VoIP work through an edge router/firewall with DHCPv6 PD relay first /64 of /60 IPv6 class addresses through to the Sky router as the inner router and then the VoIP phone should work... The IPv4 public address can be used as normal for the edge router/firewall device 😀

[cookiemonsteruk]

@mae-3 

See what i started 🤔 all over my head. 

[frankNsteeen]

At the minute, I have VDSL. I have a modem which gives an internal IP to the ASUS XT8 ( thats on a 192.168.0. X address ( wifi is on but hidden. and the modem only gives out a few ip's so kids cant connect)  The XT8's are given a 192.168.0.2 with their "wan" as 192.168.0.1

The XT8's then give out the range 192.168.1.X adresses  to all the stuff in the house - including 10's of smart devices. 

Given what's been said above - would this approach still work?

Thanks for all replies above - some it is above my head but I'll endevour to learn as I read!

[mae-3]

@frankNsteeen 

If you have a VDSL2 modem then it is configured in routed mode currently and you have double NAT, this usually is okay as long as you don't VPN in the house from the public internet, and you can use the setup to restrict the kids on either router if it has the ability?

If it's working to your satisfaction then all good leave alone, when you have an ONT it is almost the same configuration route through the Sky router and then through the Asus XT8 and do the restrictions for the kids on the Asus XT8 which is routed and double NATed.