cancel
Showing results for 
Search instead for 
Did you mean: 
cancel
Announcements
Join Customer Connection to register!
442
Views
0
Helpful
4
Replies
Netmart
Beginner

Configuration of shared address space RFC6598

Hello,

I was wondering, if someone has experience with using and set up of IP routing with Shared Address Space, RFC 6598, 100.64.0.0/10.

 

Thanks,

 

netmart

4 REPLIES 4
Francesco Molino
Events Top Contributor

Hi

Can you clarify your needs please?
I mean, do you want to interconnect your network with your provider who is using these IPs?
Or do you want to use these IPs in your network?

This is a reserved supernet for CGN. i personally use them sometimes when customer runs out of ipv4 adresses. But to specify, I don't use them for users or services, just for interconnection purposes. Which means that you can play with routing without issues. The only thing you need to make sure is to not use them to interconnect with your provider and not to advertise them to your provider.
I also use this IPs in my docker nat configuration when playing with networking stuff to make sure i won't overlap with customers subnets when distributing them.

Thanks
Francesco
PS: Please don't forget to rate and select as validated answer if this answered your question

Thank you Francesco.

Basically, I want to set up a lab first, client/server scenario:

 

Client --Priv IP 10.1.0.0 /16--switch---FW===P2P [outside]===FW----switch- Private IP 10.2.0.0/16 ---Server.

I would like to configure the outside network by complying with RFC 6598 [Address Space, 100.64.0.0/10] .

What interfaces do get IPs from these RFC6598 assigned and what routes are required to be implemented?

 

 

Hello,

 

on a side note, in order to use CGN NAT, your router needs to support the 'ip nat settings mode cgn' global command. I am not sure which routers and/or IOS versions do support that, it doesn't work in GNS3.

Francesco Molino
Events Top Contributor

Setting this on your outside interface means you really want to implement gcn?
As @georg said, this is not working on all devices.

Just for my own information, what are you really trying to achieve?

Thanks
Francesco
PS: Please don't forget to rate and select as validated answer if this answered your question