07-09-2007 09:08 AM - edited 03-03-2019 05:46 PM
Hi All,
I am setting up an internet T1 and have been told to use the ip unnumbered command as they do not provide /30 serial addresses. I also have to do nat behind this link. Normally I would put my ip nat inside on the ethernet int and the ip nat outside on the serial int. Do I follow those same rules with this setup as well? if not, what is the proper way to do this?
TIA,
R
07-09-2007 09:25 AM
Hi
They will have top do the NAT for you then unless they have allocated you some useable public IP addresses for the Internet.
If they haven't i would speak to them as without an address there is little you can do.
HTH
Jon
07-09-2007 09:53 AM
No I actually do have several usable addresses. I am just wondering if I can do somethign like the following:
interface FastEthernet0/0
ip address
ip nat inside
duplex auto
speed auto
!
!
interface Serial0/0/0:1
no ip address
encapsulation frame-relay IETF
frame-relay lmi-type ansi
!
interface Serial0/0/0:1.1 point-to-point
ip unnumbered FastEthernet0/0
ip nat outside
frame-relay interface-dlci 500 IETF
!
!
ip nat inside source static
ip nat inside source static
07-09-2007 11:25 AM
Ro
I have had this situation at a customer site where they assign public IP from the provider on the LAN interface and ip unnumbered on the outbound serial. They do ip nat inside on the LAN interface (as you are asking) and ip nat outside on the serial subinterface. It works well for them.
HTH
Rick
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