IPv6 Rapid Deployment (6rd) enables IPv6 to be deployed across an IPv4 network quickly and easily. 6rd utilizes a Service Provider’s existing IPv6 address prefixes, ensuring that the 6rd operational domain is limited to the Service Provider’s network and is under the Service Provider’s direct control.
A 6rd tunnel interface is a virtual interface that transports 6rd encapsulated IPv6 packets in an IPv4 network.
When 6rd is deployed, the IPv6 service is equivalent to native IPv6. 6rd mapping of IPv6 addresses to IPv4 addresses provides automatic determination of IPv4 tunnel endpoints from IPv6 prefixes, allowing stateless operation of 6rd.
A 6rd domain consists of several 6rd customer edge (CE) routers and one or more 6rd border relay (BR) routers. IPv6 packets encapsulated by 6rd follow the IPv4 routing topology within the service provider network.
A typical 6rd implementation using customer edge routers and border relay routers requires only one 6rd tunnel interface. A border relay router servicing multiple 6rd domains may have more than one 6rd tunnel interface. However, each 6rd domain can have only one 6rd tunnel interface.
IPv6 packets traverse the border relays when they enter or exit a Service Provider’s 6rd domain. Since 6rd is stateless, packets can be sent to the border relays using the Anycast method, where packets from a single source are routed to the nearest node in a group of potential receivers, or to several nodes, all identified by the same destination address.
Service Providers may deploy 6rd in a single domain or in multiple domains. A 6rd domain can have only one 6rd prefix. Different 6rd domains must use different 6rd prefixes.
On the Network > Routing page, in the Route Policies panel, there are four default route policies for 6rd tunnel interfaces.
There are two configuration modes:
The following four 6rd parameters can be set manually, or they can be set automatically by the DHCPv4 server if you select DHCP as the configuration mode.
In DHCP mode, the 6rd parameters are received from the bound interface. In Manual mode, the 6rd parameters must be configured manually.
