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Frame Relay Private-Global IPs NAT - NAT PT

M1S0M1S0 Member Posts: 41 ■■□□□□□□□□
in CCNA & CCENT
hi what will it be the best option to choose global IPs for the two internal network ?Lets say that I would like to configure Dynamic NAT for one and NAT - PT for other oneThx
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    networker050184networker050184 Mod Posts: 11,962 Mod
    Not sure exactly what you are asking here. Can you clarify your question?
    An expert is a man who has made all the mistakes which can be made.
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    M1S0M1S0 Member Posts: 41 ■■□□□□□□□□
    If I have an internal network 172.16.0.0/22 and I want to configure NAT on the Router to translate the private IP addresses to global IP addresses
    what will be the range of the global IPs i have to choose ?
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    networker050184networker050184 Mod Posts: 11,962 Mod
    Depends. You really don't need NAT here on a L2 service like frame relay. If you were going to be NAT'ing on a WAN link to the internet it would usually be a /30 on the WAN link but you may also have a /28 or something routed to you from the provider to use for internal hosts. If you own your own public IP space you can pretty much do whatever you want.
    An expert is a man who has made all the mistakes which can be made.
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    M1S0M1S0 Member Posts: 41 ■■□□□□□□□□
    Okay then for example the Configuration for frame relay on my interfaces for these two networks 172.16.0.0/22 and 172.16.4.0/22
    I know that will be as follows:

    interface Serial0/0/0.102 point-to-point
    ip address 172.16.4.1 255.255.252.0
    frame-relay interface-dlci 102


    interface Serial0/0/0.101 point-to-point
    ip address 172.16.0.1 255.255.252.0
    frame-relay interface-dlci 101

    but If I want to add NAT and NAT - PT for one and the other what global IP addresses I have to choose (subnet etc.) ?
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    networker050184networker050184 Mod Posts: 11,962 Mod
    You can NAT to any address you want. Or are you asking what public IPs to use? That will depend on what your company owns or your provider assigns you.
    An expert is a man who has made all the mistakes which can be made.
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    M1S0M1S0 Member Posts: 41 ■■□□□□□□□□
    yep I am asking about the public IPs i can use ?
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    networker050184networker050184 Mod Posts: 11,962 Mod
    In the real world that depends on what your company own or what it has worked out with your service provider. In a lab you can use whatever you want though.
    An expert is a man who has made all the mistakes which can be made.
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    M1S0M1S0 Member Posts: 41 ■■□□□□□□□□
    just for a lab at the moment
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