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Re: [lisp] Is there a dedicated control plane channel for interface to the Mapping system?

jnc@mercury.lcs.mit.edu (Noel Chiappa) Fri, 01 November 2013 17:19 UTC

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Date: Fri, 01 Nov 2013 13:19:25 -0400
From: jnc@mercury.lcs.mit.edu
Cc: jnc@mercury.lcs.mit.edu
Subject: Re: [lisp] Is there a dedicated control plane channel for interface to the Mapping system?
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    > From: Linda Dunbar <linda.dunbar@huawei.com>

    > There will be many ETRs, which ETR should ITR send requests? Does ITR
    > send requests to all ETRs? 

No, ITRs normally do not send Map-Request packets directly to an ETR - or
even a Map-Server.

An ITR sends Map-Request packets to a Map-Resolver, which is its 'portal'
into the mapping system. The Map-Resolver uses a distributed system called
DDT to find the Map-Server(s) which are responsible for the block of address
space the Map-Request is about. (This step may be avoided if the appropriate
delegation information is cached after it was received in response to a prior
request.) The Map-Resolver then sends the Map-Request to an appropriate
Map-Server, which forwards it on to an appropriate ETR.

	Noel

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