TP-Link ER707-M2 + Sky FTTP ONT Broadband

[Nosprawls]

Hi,

Just wondering if anyone has managed to bypass the Sky router and use ER707 instead as the primary router connected to the ONT fibre modem. Any help would be appreciated before possibly cancelling Sky as an option for broadband.

Sky Service:

- Sky Broadband Ultrafast Plus

- Router shipped from Sky - Sky Hub 4.2

[Chrisee · Accepted solution]

@Nosprawls TP-Link routers do not support the primary authentication requirement of DHCPv4 Option 61. You might get DHCPv6 PD to work but not all connections support that. Asus and some other manufacturers are better fit than TP-Link. 

[Nosprawls]

oh, thats unfortunate 😞 . Guess thats a no go with Sky for broadband backup then. Thank you

[cookiemonsteruk]

@Nosprawls 

Just my own thoughts on the matter. You could give it a go if your chosen router supports prefix delegation as detailed above. There are other things that cannot be accessed unless you are llu ie sky talk shield isn't available on non llu sky lines

[Nosprawls]

I think I managed to get it to work with the suggestion for Ipv6. 

This is how I've configured the WAN for Sky. This then works as expected as I've also enabled Link-Backup so my non Sky WAN is the preferred one and it only uses Sky as the fail-over (tested that and works ok).

What I'm concerned about is IPv6 and lack of firewall. All my VLANs only have IPv4 and do not provision IPv6 for any devices. I'm wondering is that good enough or should I be looking at something further to use this as a reliable backup WAN that doesnt open up other issues esp given my lack of familiarity with IPv6 overall. Sorry if this is more a general networking question than specific to Sky, was just wondering how folk have handled this with their Sky setups if they've gone down this same road.

[mae-3]

@Nosprawls 

Those are almost the correct settings using DHCPv6 PD but the prefix should be /56 for IPv6 and it will allocate a public IPv4 address via just dynamic DHCP IPv4 with the authentication DHCPv6 PD as well, so you'll have a dual-stack.

[Nosprawls]

@mae-3 thank you. I've switched the prefix to 56. It worked even at 48 for some reason, continues to be fine after switching to 56 too.