NAT-PT Dynamic

Sample configuration
Based on previous network diagram
http://network-101.blogspot.com/2011/02/nat-pt.html

NAT-PT Configuration section

ipv6 nat v4v6 source 1.1.1.1 777::1
ipv6 nat v4v6 source 2.2.2.1 777::2

ipv6 nat v6v4 source list pt-list pool v4pool

ipv6 nat v6v4 source 2002::1 125.249.1.10

ipv6 nat v6v4 pool v4pool 125.249.1.100 125.249.1.150 prefix-length 24

ipv6 nat prefix 777::/96
!
ipv6 access-list pt-list
 permit ipv6 3001::/64 any

Verify Configration

R1#ping 777::1 source lo0

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 777::1, timeout is 2 seconds:

Packet sent with a source address of 3001::1

!!!!!

Success rate is 100 percent (5/5), round-trip min/avg/max = 52/69/108 ms

R3#ping 125.249.1.100

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 125.249.1.100, timeout is 2 seconds:

!!!!!

Success rate is 100 percent (5/5), round-trip min/avg/max = 44/72/104 ms