Re: [RRG] Re: Should the identifier be used as local locator

[Lixia Zhang <lixia@CS.UCLA.EDU>]

On Jul 8, 2008, at 9:59 AM, Tony Li wrote:

> |2/ an engineering judgment call of whether one could borrow MAC  
> address
> |    to serve the above purpose.
> |    (this is similar to the existing TCP design of borrowing IP
> |     address as part of TCP's connection ID)
> |
> |2/ represents an engineering tradeoff because the borrowing saves the
> |trouble of managing another new ID space.
>
>
> 2/ also creates a significant security issue.  If a MAC address is  
> visible
> outside of the local subnet, then it implies that someone can track  
> a host
> as it migrates across the Internet.  That's been widely discussed  
> during the
> first iteration of GSE and pretty generally viewed as a Bad Idea.   
> At the
> very least, there needs to be a mechanism to escape from the MAC  
> address and
> jump to a separately assigned space.
>
> Tony

the above is just one of the factors of why I call 2/ an engineering  
judgment call: it gives some saving, but definitely has associated  
cost with doing so.

If one has a clear description of all the desired properties of a true  
node ID, then one can see more clearly what are the costs of this  
borrowing idea.

Lixia

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