From: Thomas Fowles (tfowles@gmail.com)
Date: Mon Feb 12 2007 - 11:28:59 ART
Nevermind ... missed your debug there :)
On 2/12/07, Thomas Fowles <tfowles@gmail.com> wrote:
>
> Does 2001:1:1::10 have a route back to 2001::20 ?
>
> On 2/11/07, nhatphuc <nhatphuc@gmail.com> wrote:
> >
> > I've tried putting ipv6 nat prefix in global config mode, but it doesn't
> > help.
> >
> > Thanks
> >
> >
> > On 2/11/07, srdja blagojevic <srdja1@pexim.co.yu> 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@groupstudy.com [mailto:nobody@groupstudy.com] 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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