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Re: Problem with NAT-PT Static posted 02/11/2007
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I've tried putting ipv6 nat prefix in global config mode, but it doesn't
help.

Thanks


On 2/11/07, srdja blagojevic <srdja1@xxxxxxxxxxx> wrote:
>
>
>
>
> My gess is that you put ipv6 nat prefix on wrong interface. From DocCD
> (Config Guide):
>
> ...The NAT-PT prefix is used to match a destination address of an IPv6
> packet. If the match is successful, NAT-PT will use the configured address
> mapping rules to translate the IPv6 packet to an IPv4 packet....
>
> This mean that you should put it on Gi0/1 since on that interface you will
> have destination ipv6 prefix. I guess that better practise is to put ipv6
> nat prefix in global config mode.
>
> HTH,
> Srdja
>
> -----Original Message-----
> From: nobody@xxxxxxxxxxxxxx [mailto:nobody@xxxxxxxxxxxxxx] On Behalf Of
> nhatphuc
> Sent: Sunday, February 11, 2007 04:34
> To: Cisco certification
> Subject: Problem with NAT-PT Static
>
> Hi GS,
>
> I configure NAT-PT as follow:
>
> interface GigabitEthernet0/0
> ip address 172.16.1.1 255.255.255.0
> duplex auto
> speed auto
> ipv6 enable
> ipv6 nat prefix 2001::/96
> ipv6 nat
> !
> interface GigabitEthernet0/1
> no ip address
> duplex auto
> speed auto
> ipv6 address 2001:1:1::1/64
> ipv6 enable
> ipv6 nat
>
> ipv6 nat v4v6 source 172.16.1.2 2001::20
> ipv6 nat v6v4 source 2001:1:1::10 172.16.1.20
>
> I can ping from IPv6 Host, but don't receive any reply:
>
> R(config)#do sh ipv6 nat trans
> Prot  IPv4 source              IPv6 source
>       IPv4 destination         IPv6 destination
> ---   ---                      ---
>       172.16.1.2               2001::20
>
> ---   172.16.1.20              2001:1:1::10
>       ---                      ---
>
> C:\>ping 2001::20
>
> Pinging 2001::20 from 2001:1:1::10 with 32 bytes of data:
>
> Request timed out.
> Request timed out.
> Request timed out.
> Request timed out.
>
> Ping statistics for 2001::20:
>     Packets: Sent = 4, Received = 0, Lost = 4 (100% loss), C:\>
>
> R(config)#
> *Feb 10 20:28:55.327: IPv6 NAT: icmp src (2001:1:1::10) -> (172.16.1.20),
> dst (2001::20) -> (172.16.1.2) *Feb 10 20:28:59.947: IPv6 NAT: icmp src
> (2001:1:1::10) -> (172.16.1.20), dst (2001::20) -> (172.16.1.2) *Feb 10
> 20:29:04.947: IPv6 NAT: icmp src (2001:1:1::10) -> (172.16.1.20), dst
> (2001::20) -> (172.16.1.2) *Feb 10 20:29:09.947: IPv6 NAT: icmp src
> (2001:1:1::10) -> (172.16.1.20), dst (2001::20) -> (172.16.1.2)
> R(config)#do
> sh ipv6 nat trans
> Prot  IPv4 source              IPv6 source
>       IPv4 destination         IPv6 destination
> ---   ---                      ---
>       172.16.1.2               2001::20
>
> ---   172.16.1.20              2001:1:1::10
>       172.16.1.2               2001::20
>
> ---   172.16.1.20              2001:1:1::10
>       ---                      ---
>
> R(config)#
>
> From IPv4 host, I ping:
>
> HostIPv4#ping 172.16.1.20
>
> Type escape sequence to abort.
> Sending 5, 100-byte ICMP Echos to 172.16.1.20, timeout is 2 seconds:
> .....
> Success rate is 0 percent (0/5)
>
> From ROUTER NAT-PT, I can ping both:
>
> R#ping 172.16.1.2
>
> Type escape sequence to abort.
> Sending 5, 100-byte ICMP Echos to 172.16.1.2, timeout is 2 seconds:
> !!!!!
> Success rate is 100 percent (5/5), round-trip min/avg/max = 1/1/4 ms
> R#ping
> 2001:1:1::10
>
> Type escape sequence to abort.
> Sending 5, 100-byte ICMP Echos to 2001:1:1::10, timeout is 2 seconds:
> !!!!!
> Success rate is 100 percent (5/5), round-trip min/avg/max = 0/0/4 ms R#
>
> Did I miss anything?
>
> Thanks
>
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