From: Jack Tsai (jacknew2005@gmail.com)
Date: Tue Aug 05 2008 - 12:27:38 ART
R1--R3--R2
The gold is to make use of NAT on R3, so that R2 can ping R1
Ref:
http://blog.internetworkexpert.com/2008/02/15/the-inside-and-outside-of-nat/
Her we go!
R1:
interface Serial1/0.103 point-to-point
ip address 10.1.13.1 255.255.255.0
frame-relay interface-dlci 132
R3:
interface Serial1/0.301 point-to-point
ip address 10.1.13.3 255.255.255.0
ip nat enable
frame-relay interface-dlci 312
!
interface Serial1/0.302 multipoint
ip address 10.1.23.3 255.255.255.0
ip nat enable
frame-relay map ip 10.1.23.2 302
frame-relay map ip 10.1.23.3 302
frame-relay interface-dlci 302
!
ip nat source static 10.1.23.2 10.1.13.2
ip nat source static 10.1.13.1 10.1.23.1
R2:
interface Serial1/0.203 multipoint
ip address 10.1.23.2 255.255.255.0
frame-relay map ip 10.1.23.2 203
frame-relay map ip 10.1.23.3 203
frame-relay interface-dlci 203
Test:
R1#sh ip route
C 10.1.13.0/24 is directly connected, Serial1/0.103
R1#ping 10.1.13.3
Sending 5, 100-byte ICMP Echos to 10.1.13.3, timeout is 2 seconds:
!!!!!
R1#ping 10.1.13.1
.....
Success rate is 0 percent (0/5)
R3#ping 10.1.13.1 successful
R3#ping 10.1.13.3 successful
R3#ping 10.1.23.2 successful
R3#ping 10.1.23.3 successful
R2#ping 10.1.23.3 successful
R2#ping 10.1.23.2
.....
Success rate is 0 percent (0/5)
R2#ping 10.1.23.1
.....
Success rate is 0 percent (0/5)
Please help!
Thanks,
Jack
Petr Lapukhov wrote:
> Huan,
>
> NAT could be tricky sometimes, you see now! But personally, I'm a big fan of
> doing all kinds of weird things with NAT :)
> So here is another link explaining the difference between inside and outside
> NAT domain:
>
> http://blog.internetworkexpert.com/2008/02/15/the-inside-and-outside-of-nat/
>
> HTH
Blogs and organic groups at http://www.ccie.net
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