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carrier grade NAT

Posted: Wed Feb 12, 2014 4:52 pm
by braidiano
Hello,

do anyone use a carrier grade with mikrotik NAT to save public IPs? How?

Re: carrier grade NAT

Posted: Wed Feb 12, 2014 5:49 pm
by rickfrey
Can you be a little more specific, please? The answer is going to be yes, but I need more info on what you are wanting to do to answer the "how" part.

Re: carrier grade NAT

Posted: Wed Feb 12, 2014 6:04 pm
by braidiano
Hello,

mikrotik itslef doesn't support a carrier grade NAT off the box. So, how do you implement it? Using some script or external dhcp, or with additional appliace? How you carrier grade NAT functioning?

Re: carrier grade NAT

Posted: Thu Feb 13, 2014 10:55 am
by hedele
I think he refers to this RFC where Carrier-Grade NAT using reserved IANA IPv4 space (100.64.0.0/10) is defined:
http://tools.ietf.org/search/rfc6598

In this document, it is said that:
... Shared Address Space can be used as additional non-globally routable space on routing equipment that is able to do address translation across router interfaces when the addresses are identical on two different interfaces.
Devices MUST be capable of performing address translation when identical Shared Address Space ranges are used on two different interfaces.
Which I don't think is easily doable on RouterOS... maybe if you play around with VRFs.