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Re: Verizon DSL moving to CGN
From: "Rajiv Asati (rajiva)" <rajiva () cisco com>
Date: Mon, 8 Apr 2013 18:50:00 +0000

Sam,

What may make 'much more sense' in one network, doesn't necessarily make
as much since in another network. As I understand it, MAP requires at
least a software change on existing CPE, if not wholesale CPE change.
Some providers may prefer to implement CGN instead if the capital outlay
is less (and providing new CPE to customers through walkins or truck
rolls
can be problematic).

I agree with you. Having said that, the way many ISPs are approaching the
MAP deployment is by letting the new customers get the MAP capable CPE
from the get go, while letting the existing customers' get their CPE
routers upgraded when/if they need a truck roll or through regular S&H
(much like how Vonage does it).


It is certainly very much possible to get MAP functionality by software
upgrades, though the mileage may vary.


What devices does Cisco support MAP on? Specifically, does the DPC3827
support it?

MAP BR function is supported on ASR9K and ASR1K.

I am not aware of MAP CE function support on DPC3827 CPE router.


Cheers,
Rajiv

-----Original Message-----
From: "<Sam Hayes Merritt>", III <sam () themerritts org>
Date: Sunday, April 7, 2013 10:56 PM
To: Rajiv Asati <rajiva () cisco com>
Cc: nanog list <nanog () nanog org>
Subject: Re: Verizon DSL moving to CGN


MAP is all about stateless (NAT64 of Encapsulation) and IPv6 enabled
access. MAP makes much more sense in any SP network having its internet
customers do IPv4 address sharing and embrace IPv6.

What may make 'much more sense' in one network, doesn't necessarily make
as much since in another network. As I understand it, MAP requires at
least a software change on existing CPE, if not wholesale CPE change.
Some providers may prefer to implement CGN instead if the capital outlay
is less (and providing new CPE to customers through walkins or truck
rolls 
can be problematic).

Our plan for my company at this time is to deploy native IPv4+IPv6 to
all customers. While we are doing that, continue discussions and testing
with CGN providers so that when we are unable to obtain anymore IPv4
addresses, we can then deploy CGN. Our hope is that we never get to the
point of having to go CGN but we have to be ready in case that day comes
and have our implementation and opt-out (if available) processes ready.


What devices does Cisco support MAP on? Specifically, does the DPC3827
support it?


sam



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