Cradlepoint COR IBR350 Manual page 83

There are two main types of IPv6 WAN connectivity: native (Auto and Static) and tunneling over IPv4 (6to4, 6in4, and 6rd).
• Native – (Auto and Static) The upstream ISP routes IPv6 packets directly.
• IPv6 tunneling – (6to4, 6in4, and 6rd) Each IPv6 packet is encapsulated by the router in an IPv4 packet and routed over an IPv4 route to a
tunnel endpoint that decapsulates it and routes the IPv6 packet natively. The reply is encapsulated by the tunnel endpoint in an IPv4 packet
and routed back over an IPv4 route. Some tunnel modes do not require upstream ISPs to route or even be aware of IPv6 traffic at all. Some
modes are utilized by upstream ISPs to simplify the configuration and rollout of IPv6.
Enable IPv6 and select the desired IPv6 connection method for this WAN interface.
• Disabled (default) – IPv6 disabled on this interface.
• Auto – IPv6 will use automatic connection settings (if available).
• Static – Input a specific IPv6 address for your WAN connection. This is provided by the ISP if it is supported.
• 6to4 Tunnel – Encapsulates the IPv6 data and transfers it to an automatic tunnel provider (if your ISP supports it).
• 6in4 Tunnel – Encapsulates the IPv6 data and sends it to the configured tunnel provider.
• 6rd Tunnel (IPv6 rapid
When you configure IPv6, you have the option to designate DNS Servers and Delegated Networks. Because of the dual-stack setup, these
settings are optional: when configured for IPv6, the router will fall back to IPv4 settings when necessary.
DNS Servers
Each WAN device is required to connect IPv4 before connecting IPv6. Because of this, DNS servers are optional, as most IPv4 DNS servers will
respond with AAAA records (128-bit IPv6 DNS records, most commonly used to map hostnames to the IPv6 address of the host) if requested. If
no IPv6 DNS servers are configured, the system will fall back to the DNS servers provided by the IPv4 configuration.
Delegated Networks
A delegated network is an IPv6 network that is inherently provided by or closely tied to a WAN IP configuration. The IPv6 model is for each device
to have end-to-end IP connectivity without relying on any translation mechanism. In order to achieve this, each client device on the LAN network
needs to have a publicly routable IPv6 address. ##### Auto IPv6 auto-configuration mode uses DHCPv6 and/or SLAAC to configure the IPv6
networks. When you select Auto, all of the following settings are optional (depending on your provider's requirements):
• PD Request Size – Prefix Delegation request size. This is the size of IPv6 network that will be requested from the ISP to delegate to LAN
networks. (Default: 63)
• Primary IPv6 DNS Server – (optional) Depending on your provider, this may be required. This only takes effect if the default global DNS
setting on the Network Settings > DNS page is "Automatic".
• Additional IPv6 DNS Server – Secondary DNS server.
• Delegated IPv6 Network – (optional) Network available for delegation to LANs. Depending on your provider, this may be required. Prefixes
specified here only take effect if those supplied by the connection are insufficient to configure your LANs.
• Delegated IPv6 Network – Additional network available for delegation to LANs.
Example Configuration:
Static As with IPv4, static configuration is available for situations where the WAN IPv6 topology is fixed.
• IPv6 Address/CIDR – Input the IPv6 static IP address and mask length provided by your ISP (see the
• IPv6 Gateway IP – Input the IPv6 remote gateway IP address provided by your ISP.
• Primary IPv6 DNS Server – (optional) Depending on your provider/setup, this may be required. This only takes effect if the default global
DNS setting on the Network Settings > DNS page is "Automatic".
deployment) – Encapsulates the IPv6 data and sends it to a relay server provided by your ISP.
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Wikipedia explanation of CIDR).