02-07-2012 05:17 AM - edited 03-01-2019 05:32 PM
Hello , I am trying to setup nat-pt so that an ipv6-only network can communicate with an ipv4-only network and vice-versa.
I have followed the cisco ipv6 configuration guide ''Enabling Traffic to be Sent from an IPv6 Network to an IPv4 Network without Using IPv6 Destination Address Mapping"
However i cannot make it to work, i really need some help
Below is the topology and the router config;
note; simulated using latest packet tracer and static mapping was working
hostname Router
!
ipv6 unicast-routing
!
interface FastEthernet0/0
no ip address
duplex auto
speed auto
ipv6 address 2001:DB8:FFFF:1::9/64
ipv6 nat prefix 2000::/96 v4-mapped v4mapcal
ipv6 enable
ipv6 nat
!
interface FastEthernet0/1
ip address 192.168.1.1 255.255.255.0
duplex auto
speed auto
ipv6 nat
!
interface Vlan1
no ip address
shutdown
!
ip classless
!
ipv6 access-list v4mapcal
permit ipv6 2001::/96 2000::/96
!
line con 0
line vty 0 4
login
!
end
02-09-2012 09:32 AM
I imagine it's not working since either your IPv6 address on fa0/0 or the ipv6 access list 'v4mapcal' is wrong.
2001:DB8:FFFF:1::9/64
does not match
2001::/96
This works the same as IPv4 masking, so maybe writing them out illustrates your problem (slashes represent where the mask ends):
2001:0db8:ffff:0001 / 0000:0000:0000:0009
2001:0000:0000:0000:0000:0000 / 0000:0000
Either re-IPv6 your fa0/0 interface to something like: 2001::9/64
Or redo your access list to something like: permit ipv6 2001:db8:ffff:1::/96
cheers.
02-12-2012 07:25 AM
really thanks for replying, however after not only ackowledging your reply but also after some extensive research, i have decided to simulate a network with simpler configurations.
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