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    Sky VDSL with ZyXEL VMG3925-B10B - MER (IPoE)

    This is a discussion on Sky VDSL with ZyXEL VMG3925-B10B - MER (IPoE) within the Sky Broadband (Fibre) Help forums, part of the Sky Broadband help and support category; I figured out that IPoE may be the way forward and found old ZyXEL VMG3925-B10B. Here is my settings for ...

    1. #1
      MAC.Encapsulation.Routing's Avatar
      MAC.Encapsulation.Routing is offline Sky User Member
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      Sky VDSL with ZyXEL VMG3925-B10B - MER (IPoE)

      I figured out that IPoE may be the way forward and found old ZyXEL VMG3925-B10B.

      Here is my settings for IPoE [in brackets is selected option]:

      #General
      ------------------------------------------------------------------------
      Active [Enable] - Disable
      Name Sky VDSL IPoE MER
      Type [ADSL/VDSL over PTM] - ADSL over ATM - Ethernet
      Mode [Routing] Bridge
      Encapsulation [IPoE] - PPPoE
      IPv4/IPv6 Mode [IPv4 Only] - IPv4 IPv6 DualStack - IPv6 Only


      #IP Address
      ------------------------------------------------------------------------
      [Obtain an IP Address Automatically] - Static IP Address


      #VLAN
      ------------------------------------------------------------------------
      Active : [Enable] - Disable
      802.1p : 0
      802.1q : [101] - (1~4094)


      #MTU
      ------------------------------------------------------------------------
      MTU : 1500


      #Routing Feature
      ------------------------------------------------------------------------
      NAT Enable [Enable] - Disable
      Fullcone NAT Enable Enable - [Disable]
      IGMP Proxy Enable [Enable] Disable
      Apply as Default Gateway [Enable] Disable


      #DNS Server
      ------------------------------------------------------------------------
      [Obtain DNS Info Automatically] - Use Following Static DNS Address


      #DHCPC Options
      ------------------------------------------------------------------------
      Request Options : option 43 - option 121

      Sent Options : option 60

      Vendor ID : option 61
      IAID :
      DUID :
      option 125


      #6RD
      ------------------------------------------------------------------------
      6RD Enable [Disable]


      But option 61 has 2 choices IAID and DUID.

      When I attempt to populate and save the fields I get the following errors:
      DHCP Option 61 IAID must be 8 hexadecimal digits.
      DHCP Option 61 DUID must be hexadecimal digits.


      So can someone confirm what format should I use?

      I have found interesting webpage explaining things bit more:
      https://www.draytek.co.uk/support/gu...re-setup-guide

      8 hexadeximal digits must be the password
      but if I try to fill in the DUID with 7c4ca5123456@skydsl I get the error.

      Does anyone know what format should the DUID be?

      And what is the "option 125"?
      Last edited by MAC.Encapsulation.Routing; 15-06-20 at 04:46 PM.


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    3. #2
      det's Avatar
      det
      det is offline Sky User Member
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      Re: Sky VDSL with ZyXEL VMG3925-B10B - MER (IPoE)

      Contrary to the popular belief on internet forums (and even the Sky Hub's interface), Sky's Fibre products do not make use of MER / RFC1483.
      IPoE is indeed the correct term, which simply means DHCP over Ethernet. (VDSL2 uses native Ethernet framing instead of Ethernet over ATM)

      Regarding DHCPv4 Option 61 "Client-ID" (Not to be confused with DHCPv6 Option 61, which is something completely different), is still required so that Sky's BNG/RADIUS knows that the DHCPv4 Client is coming from a Sky Hub and not some random device on the LAN. The actual content of Option 61 isn't important anymore, but I know there is still some legacy regex that matches on the fake "username" string before the pipe, so if you include that format, you'll be safe.
      Previous experience has shown that DHCPv4 clients require providing this value encoded as hex, rather than a string. So if we take "7c4ca5123456@skydsl|" (with a pipe on the end) and pass it through an ascii to hex tool, we get: "37633463613531323334353640736b7964736c7c", try that.

      Regarding IAID and DUID, Sky isn't using Option 61 formatted in this fashion, but you can read about this format in RFC4361. Instead, Sky are simply using Option 61 as an opaque/free text field. If your CPE router UI doesn't let you input a single string for Opt61 and instead forces you to use IAID + DUID, try taking the above hex-encoded string, split it in to two, putting the first 8 hex digits in the IAID, and the remaining in the DUID field.


      See this post over on Sky's official forums, DHCPv4 Option 61 is no longer strictly needed if you live in an area where Openreach insert the required options in to DHCPv6. However it's probably best to do include them if you want DHCPv4 to be stable and not rely on DHCPv6 for authentication.

      - - - Updated - - -

      Also you're not configuring it for Dual Stack?
      Last edited by det; 17-06-20 at 12:10 PM.

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    5. #3
      MAC.Encapsulation.Routing's Avatar
      MAC.Encapsulation.Routing is offline Sky User Member
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      Re: Sky VDSL with ZyXEL VMG3925-B10B - MER (IPoE)

      I would love to have Dual Stack, but first wanted to get the IPv4 working first, but without any luck.

      I have manged to get RouterBoard working with Sky VDSL and Huawei EchoLife HG612 3B in the meantime ...
      http://www.skyuser.co.uk/forum/techn...tml#post476368


      It could be that the firmware that I am running on the VMG3925-B10B is 5.13(AAVF.9)C0 and may have to upgrade to newer one.


      Maybe I did not explain properly, here ar the details I was working with
      24a7aabbeeff@skydsl|54321fed - ASCII | HEX - 32346137616162626565666640736b7964736c7c3534333231 666564
      24a7aabbeeff@skydsl| - ASCII | HEX - 32346137616162626565666640736b7964736c7c
      24a7aabbeeff@skydsl- ASCII | HEX - 32346137616162626565666640736b7964736c
      54321fed - ASCII | HEX - 3534333231666564

      DHCP Option 61 IAID must be 8 hexadecimal digits.
      so I set it to: 54321fed as it is 8 character in lenght
      Converting to HEX I get 3534333231666564, but that is too long, it only takes 8 characters

      DHCP Option 61 DUID must be hexadecimal digits.
      so I set it to: 24a7aabbeeff@skydsl|
      and tried as well: 24a7aabbeeff@skydsl
      and: 32346137616162626565666640736b7964736c7c
      as well as: 32346137616162626565666640736b7964736c

      And nothing worked .....

      Let me see, maybe if I shorten the hex code to 8 characters for the "DHCP Option 61 IAID" then it may work ..... as now it does not matter what is in the DHCP Option 61 details, right?

    6. #4
      det's Avatar
      det
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      Re: Sky VDSL with ZyXEL VMG3925-B10B - MER (IPoE)

      Don't be confused by the hexadecimal characters that you see in the string "24a7aabbeeff@skydsl|54321fed", it's still a string.

      Take the full string and convert it all to hex, 32346137616162626565666640736b7964736c7c3534333231 666564

      Take the first 8 hex digits (
      32346137) and put that in as the IAID
      Take the remaining hex digits (
      616162626565666640736b7964736c7c3534333231666564) and use that as the DUID.


      Ironically, if you ignore all this and simply enable DHCPv6 as well, it may fix DHCPv4, for reasons mentioned in that Sky forum post I linked above.


    7. #5
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      Re: Sky VDSL with ZyXEL VMG3925-B10B - MER (IPoE)

      Nope, not working ;(
      See below settings I have used.

      #General
      ------------------------------------------------------------------------
      Active [Enable] - Disable
      Name Sky VDSL IPoE MER
      Type [ADSL/VDSL over PTM] - ADSL over ATM - Ethernet
      Mode [Routing] Bridge
      Encapsulation [IPoE] - PPPoE
      IPv4/IPv6 Mode IPv4 Only - [IPv4 IPv6 DualStack] - IPv6 Only


      #IP Address
      ------------------------------------------------------------------------
      [Obtain an IP Address Automatically] - Static IP Address


      #VLAN
      ------------------------------------------------------------------------
      Active : [Enable] - Disable
      802.1p : 0
      802.1q : [101] - (1~4094)


      #MTU
      ------------------------------------------------------------------------
      MTU : 1500


      #Routing Feature
      ------------------------------------------------------------------------
      NAT Enable [Enable] - Disable
      Fullcone NAT Enable Enable - [Disable]
      IGMP Proxy Enable [Enable] Disable
      Apply as Default Gateway [Enable] Disable


      #DNS Server
      ------------------------------------------------------------------------
      [Obtain DNS Info Automatically] - Use Following Static DNS Address


      #DHCPC Options
      ------------------------------------------------------------------------
      Request Options :
      - option 43
      - option 121

      Sent Options :
      - option 60

      Vendor ID :
      -[option 61]
      IAID : 32346137
      DUID : 616162626565666640736b7964736c7c3534333231666564

      - option 125


      #IPv6 Address
      ------------------------------------------------------------------------
      [Obtain an IPv6 Address Automatically] - Static IPv6 Address


      #IPv6 Routing Feature
      ------------------------------------------------------------------------
      MLD Proxy Enable [Enable] - Disable - I have tried both
      Apply as Default Gateway [Enable] - Disable


      #IPv6 DNS Server
      ------------------------------------------------------------------------
      [Obtain IPv6 DNS Info Automatically] - Use Following Static IPv6 DNS Address





      reboot and the router still did not get any IPv4 or IPv6 ...


      I may have to upgrade the firmware and try again later ;)

    8. #6
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      Re: Sky VDSL with ZyXEL VMG3925-B10B - MER (IPoE)

      You could just use the 3925 in bridge mode and run opnsense or pfsense if you prefer. Both support sky ipv6
      zyxel VMG3925 (bridge mode)
      Qotom i5 Opnsense with IPV6
      Asus RT-AC88U - as wap

      ECI CAB- G.INP disabled 8th April 2016


      click for ECI VDSL line stats

      click for Huawei VDSL line stats

     

     

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