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metalwolf
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Sky FTTP Configuration

Mon Apr 25, 2022 12:18 am

Hi,

Not sure if this is the correct part of the forum to post. I've been trying to get my mikrotik router to get IP from Sky but without much luck. Has anyone managed to get it to work and can point me in the right direction?
I've learned that code 61 is required to be set on the dhcp client for ipv4 and ipv6 to something@skydsl|something where something can be anything as its not checked. This is the only thing that seems to be required. I read they don't want duid passed and I've unchecked that for both ipv4 and ipv6 although its still listed for ipv6. It appears to do the authentication over ipv6 and it goes to state error when I connect the cable. I'm really hoping someone already has this working and can point me in the right direction. There is a post for sky vdsl but it doesn't have the same setup as it is only meant to require the code 61.
Any help is appreciated.
 
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MickeyT
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Re: Sky FTTP Configuration

Mon Apr 25, 2022 10:48 am

I've never used Sky FTTP so this is only a guess. Do they require a VLAN ID to be set on the WAN connection (some ISPs do and others don't)? Also, some (control freak) ISPs bind the link to the MAC address of the modem/router they provide and you have to get them to remove the binding before a different modem/router can be used.

Have you contacted Sky directly for the network configuration required and if the link is bound to the modem/router MAC address?
 
tdw
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Re: Sky FTTP Configuration

Mon Apr 25, 2022 1:01 pm

No. They were the first provider in the UK to use IPoE instead of PPPoE on WAN connections, and used DHCP option 61 to identify the router so any other random devices plugged directly into WAN would not acquire an address. Many modem/router manufacturers, and sometimes Sky themselves, erroneously refer to this as 'MER' or 'MER Authentication'.

This explains the history and current state https://helpforum.sky.com/t5/Broadband/ ... 05#M242413
 
metalwolf
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Re: Sky FTTP Configuration

Mon Apr 25, 2022 9:51 pm

i did ask in the sky user forums as there are lots of people there who have switched to their own routers. The comment they suggest is that I need to turn on SLAAC/stateless for IPv6 which seems to be neighbor discovery but I really don't understand that. Hopefully someone who has got it working will spy this otherwise I'm stuck with the sky standard router with my mikrotik hanging off that.
 
tdw
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Re: Sky FTTP Configuration

Mon Apr 25, 2022 10:30 pm

Per that Sky forum post - if you configure IPv6 and DHCPv6 that "authenticates" the DHCPv4, otherwise you have to fake up an option 61 in the DHCPv4 request.

Last year I used the following on an IPv4 only setup after the WAN connection was slammed:
/ip dhcp-client option
add code=61 name=clientid_duid_sky value=0x322e30342e313931392e527c3030337c45523131357c4231323334314142303031323334
add code=61 name=clientid_sky value=0x31326331616231326161313240736b7964736c7c3132336131613132
/ip dhcp-client
add dhcp-options=clientid_duid_sky,clientid_sky interface=ether1
based on viewtopic.php?t=162419. I'm not sure why that sends option 79 as it wasn't required, and I'm not sure if both of those option 61 values are necessary as I didn't have time to experiment.
 
metalwolf
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Re: Sky FTTP Configuration

Tue Apr 26, 2022 11:58 am

I followed that guide already and had no luck with it. From what I've read the VDSL and FTTx is different. It doesn't use the DUID for FTTx products.
 
tdw
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Re: Sky FTTP Configuration

Tue Apr 26, 2022 7:56 pm

The setup in my previous post was used on FTTP, ether1 plugged directly into the Openreach ONT. If you are switching between a Sky router and something else I believe you have to leave some time or the new device will fail to acquire an address.
 
AidanAus
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Re: Sky FTTP Configuration

Thu Apr 28, 2022 6:04 am

The setup in my previous post was used on FTTP, ether1 plugged directly into the Openreach ONT. If you are switching between a Sky router and something else I believe you have to leave some time or the new device will fail to acquire an address.
Most ISP's should have something on their portal where you can close the old session if they are using mac biased auth on their IPoE

Hey OP IPoE is generally just the DHCP server sending 2 additional attributes, one saying what port it is coming off and the hostname of the router, this is called option 62, you sure this is not what yours is set up as? If so nothing apart form the DHCP client should be needed on your end other than possibly closing the old session through your ISP portal.
 
metalwolf
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Re: Sky FTTP Configuration

Thu Apr 28, 2022 1:36 pm

It seems for sky its all Option 61 for DHCP and all they check for is @skydsl|, they also don't do mac address verification - so i don't need that. It looks like I need to do some more reading on DHCPv6 PD as that apparently can block it. If I figure it out I'll post the commands I've used. I have a mikrotik I can zero the config on so that I can test and make sure it works. I've been reading a lot on sky forums on how other routers are configured (often fairly simply), but with mikrotik being as configurable I just need to figure out the options.

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