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NAT-PT
Network Address Translation – Protocol Translation (NAT-PT) enables communication between IPv4
and IPv6 nodes by translating between IPv4 and IPv6 packets. It performs IP address translation,
and according to different protocols, performs semantic translation for packets. This technology is
only suitable for communication between a pure IPv4 node and a pure IPv6 node. For more
information about NAT-PT, see "Configuring NAT-PT."
6PE
6PE enables communication between isolated IPv6 networks over an IPv4 backbone network.
6PE adds labels to the IPv6 routing information about customer networks and advertises the
information into the IPv4 backbone network over internal Border Gateway Protocol (IBGP) sessions.
IPv6 packets are labeled and forwarded over tunnels on the backbone network. The tunnels can be
GRE tunnels or MPLS LSPs.
Figure 88 Network diagram
6PE is a highly efficient solution. When an ISP wants to utilize the existing IPv4/MPLS network to
provide IPv6 traffic switching, it only needs to upgrade the PE routers. In addition, the operation risk
of 6PE is very low. For more information about 6PE, see Layer 3—IP Routing Configuration Guide.
Command and hardware compatibility
Commands and descriptions for centralized devices apply to the following routers:
• MSR1002-4/1003-8S.
• MSR2003.
• MSR2004-24/2004-48.
• MSR3012/3024/3044/3064.
• MSR954(JH296A/JH297A/JH298A/JH299A/JH373A).
• MSR958(JH300A/JH301A).
Commands and descriptions for distributed devices apply to MSR4060 and MSR4080 routers.
Protocols and standards
Protocols and standards related to IPv6 include:
• RFC 1881, IPv6 Address Allocation Management
• RFC 1887, An Architecture for IPv6 Unicast Address Allocation
• RFC 1981, Path MTU Discovery for IP version 6
• RFC 2375, IPv6 Multicast Address Assignments
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