Ipv4-Initiated Communication - HPE FlexNetwork HSR6800 Configuration Manual
Comware 7 layer 3, ip services
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Also See for FlexNetwork HSR6800:
- Security command reference (538 pages) ,
- Configuration manual (482 pages) ,
- Command reference manual (153 pages)
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If a matching policy is found, AFT translates the source IPv6 address according to the
policy.
If no matching policy is found, AFT discards the packet.
4.
AFT forwards the translated packet and records the mappings between IPv6 addresses and
IPv4 addresses.
5.
AFT translates the IPv4 addresses in the response packet header to IPv6 addresses based on
the address mappings before packet forwarding.
For more information about IPv6-to-IPv4 destination address translation policies, see
an IPv6-to-IPv4 destination address translation
For more information about IPv6-to-IPv4 source address translation policies, see
IPv6-to-IPv4 source address translation
Figure 150 AFT process for IPv6-initiated communication
IPv6 addr: 3000:0:ff02:202:200::/48
Embedded IPv4 addr: 2.2.2.2/8
IPv6 host
IPv4-initiated communication
As shown in
follows:
1.
Upon receiving a packet from the IPv4 host, AFT compares the packet with IPv4-to-IPv6
destination address translation policies.
If a matching policy is found, AFT translates the destination IPv4 address according to the
policy.
If no matching policy is found, AFT does not perform address translation.
2.
AFT performs the pre-lookup to determine output interface for the translated packet. PBR is not
used for the pre-lookup.
If a matching route is found, the process goes to step 3.
If no matching route is found, AFT discards the packet.
3.
AFT compares the source IPv4 address with IPv4-to-IPv6 source address translation policies.
If a matching policy is found, AFT translates the source IPv4 address according to the
policy.
NAT64 prefix: 2000::/32
IVI prefix: 3000::/32
Dst: 2000:0:101:101::
Src: 3000:0:ff02:202:200::
Translates addresses based on
the NAT64 prefix, IVI prefix, or
v6tov4 AFT policy
Translates addresses based on
the recorded mappings
Dst: 3000:0:ff02:202:200::
Src: 2000:0:101:101::
Figure
151, when the IPv4 host initiates access to the IPv6 host, AFT operates as
policy."
policy."
IPv4 addr: 1.1.1.1/8
Translated IPv6 addr: 2000:0:101:101::/40
AFT
Dst: 1.1.1.1
Src: 2.2.2.2
Dst: 2.2.2.2
Src: 1.1.1.1
410
IPv4 host
"Configuring
"Configuring an
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