H3C Technologies H3C SecPath F1000-E - Manual (Page 189)

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Currently, NAT-PT supports Internet Control Message Protocol (ICMP), Domain Name System (DNS), File
Transfer Protocol (FTP), and other protocols that employ the network layer protocol but have no address
information in the protocol messages.
Protocols and Standards
• RFC 2765: Stateless IP/ICMP Translation Algorithm
• RFC 2766: Network Address Translation - Protocol Translation (NAT-PT)
NAT-PT Configuration Task List
Complete the following tasks to configure NAT-PT to allow active access from an IPv6 host to an IPv4 host:
Task Remarks
Enabling NAT-PT Required
Configuring a NAT-PT Prefix Required
Configuring IPv4/IPv6 Address Mappings on the IPv6
Side
Required
Configuring a static mapping on the IPv4 side
Optional
If no static IPv4/IPv6 address mapping is configured,
the lowest 32 bits of the destination IPv6 address is
used as the translated destination IPv4 address.
Setting the ToS Field after NAT-PT Translation Optional
Complete the following tasks to configure NAT-PT to allow active access from an IPv4 host to an IPv6 host:
Task Remarks
Enabling NAT-PT Required
Configuring a NAT-PT Prefix Required
Configuring IPv4/IPv6 Address Mappings on the IPv4
Side
Optional
If no IPv4/IPv6 address mapping is configured, the
source IPv4 address added with the first configured
NAT-PT prefix is used as the translated source IPv6
address.
Configuring Static NAPT-PT Mappings of IPv6 Servers
Required
Complete either task.
Setting the Traffic Class Field after NAT-PT Translation Optional
Configuring NAT-PT
Configuration Prerequisites
Before implementing NAT-PT, you need to: