Re: [RRG] Mapping Distribution and Management: contribution for comments

[Brian E Carpenter <brian.e.carpenter@gmail.com>]

Hi,

On 2008-07-17 10:09, K. Sriram wrote:
> I am submitting a contribution (co-authored with Young-Tak Kim and Doug
> Montgomery)
> on the topic of "Architectural Considerations for Mapping Distribution
> Protocols"
> for discussion and comment on this list.
> 
> A link to the paper is:
> http://www.antd.nist.gov/~ksriram/NGRA_map_mgmt.pdf

I have a couple of questions about Fig. 3:

Firstly, what is the advantage in the lower layer
of ETRs (ETR1-6) being ETRs at all? If they are handling
locators that aggregate at ETR7 and ETR8 respectively,
why not just en/decapsulate at ETR7 and ETR8?

(To be clear, the suggestion I put out some months ago didn't
just have a hierarchy of ETRs; it also had a hierarchy
of locator domains and a hierarchy of maps, so you would
decapsulate and re-encapsulate with a different mapping at
each layer. That was supposed to be a scaling mechanism.)

Secondly, your two multihoming examples are only connected
to second layer ETRs (ETR7 and ETR8). Is there any reason
you can't multi-home at the first layer?

    Brian

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