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Re: [Ila] [5gangip] PS draft: New Version Notification for draft-hspab-5gangip-atticps-00.txt

Dino Farinacci <farinacci@gmail.com> Thu, 01 February 2018 18:52 UTC

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From: Dino Farinacci <farinacci@gmail.com>
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Date: Thu, 01 Feb 2018 10:52:10 -0800
Cc: Tom Herbert <tom@quantonium.net>, 5GANGIP <5gangip@ietf.org>, Behcet Sarikaya <sarikaya@ieee.org>, ila@ietf.org
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Subject: Re: [Ila] [5gangip] PS draft: New Version Notification for draft-hspab-5gangip-atticps-00.txt
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Right, if ILA-N runs at my house, which it could, I have your source locator. I know your entry point to the network. If the ILA-R is farther away from you, it is coarser information. 

Dino

> On Feb 1, 2018, at 7:51 AM, Tom Herbert <tom@herbertland.com> wrote:
> 
> 
> 
> On Wed, Jan 31, 2018 at 5:32 PM, Dino Farinacci <farinacci@gmail.com> wrote:
> What if you and I are running ILA and are attached to different providers. How do you get packets to me if my locators are not exposed outside my provider?
> 
> Dino,
> 
> Here's what the path looks like
> 
> Host_1 - Internet - ILA-R - Network - ILA-N - Host_2
> 
> When Host_1 sends to Host_2 the packet is addressed to Host_2's SIR address (externally visible addressed). The packet is routed without modification over Internet to an ingress router (ILA-R). This router transforms the destination with locator for Host_2 which is the rotatable prefix associated with ILA-N. Packet is forwarded over the network. At ILA-N, the ILA transformation is reversed so that SIR address is again the destination.  Packet is then delivered to Host_2.
> 
> The reverse path looks the same where ILA transformation is performed by  Host_1's provider. 
> 
> The path is equivalent to use of encapsulation to provide the network overlay where ILA-R is replaced by encapsulator and ILA-N is a decapitator.
> 
> Tom
>

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