IPv6 in eir Fibre broadband

The F2000 modem supports dual-stack Internet access.

Modem WAN Interface

The modem has to request IPv6 in addition to the old IPv4.
IPv6 is provided in parallel with IPv4 in native Dual-Stack mode (neither DS-Lite or 6RD modes are used). The F2000 modem's DHCPv6 client requests a delegated prefix (IA_PD) from the network. The network DHCPv6 server responds with an Advertise message containing the delegated prefix with a valid-lifetime of 1 hour. The same prefix will be assigned as long as the modem is connected. If the modem is disconnected for 1 hour or sends a Release message (e.g. when set to IPv4 only) a different delegated prefix will be The Internet's assigned on a subsequent request.

Modem LAN/WiFi Interface

There's nothing to do on the LAN/WiFi side, it is all automatic.
The modem selects a fixed /64 prefix from the delegated prefix and uses SLAAC to provide IPv6 addresses to connected wired and WiFi devices. The remainder of the delegated prefix is reserved for future use when the router supports further delegation.
IPv6 will only be advertised on the LAN when an IPv6 delegated prefix has been requested and received on the WAN interface.
IPv6 recursive DNS servers (RDNSS) are advertised on the LAN by the modem's DHCPv6 server.

Will IPv4 applications continue to work?

Yes. The modem is still assigned a public IPv4 address. However most applications will prefer to use IPv6 end-to-end in cases where it is available across the Internet.

Is the delegated prefix static?

No, it comes from a pool, but it will be retained for as long as it is RENEWed successfully. Static delegated prefix assignments require some development work and staff administrative time to manage them. By launching now with dynamic IPv6 addresses a contribution can be made to increasing the ratio of IPv6 to IPv4 usage and encouraging websites to support IPv6. It will be easier to get through product development later when IPv6 deployment is greater and more customers are requesting it.

Modem software

B035 software (released March 2017) has the following IPv6 related improvements
  • RDNSS router advertisement option (RFC6106) - this will allow IPv6-only Internet from Android 5.0+ devices
  • Periodic Router Advertisements are sent with a random interval between 200 to 600 seconds
An upcoming release (provisionally B036) due in approximately July 2017 will:
  • Fix an issue with NDP NA messages in some client OSes that breaks communication from the DNS proxy in the F2000
  • Allow static IPv6 DNS servers be specified for the modem caching DNS proxy
  • Dual-stack is made the default on factory settings restore for VDSL-WAN and GE-WAN interfaces
  • When upgrading to the new firmware dual-stack will be turned on for the VDSL-WAN and GE-WAN interfaces if not already on

Comments

  1. Unknown1 August 2017 at 04:46

    "B035 software (released March 2017)" - where can we get this???

    ReplyDelete
  2. RC1 August 2017 at 11:17

    The F2000 will download the current software if it has "TR069" ticked in the Service type list. This can be found under Internet-->Internet-Settings for the active WAN interface. B036 should begin being downloaded mid-August.

    ReplyDelete

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