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Re: [lisp] Last Call: <draft-ietf-lisp-eid-block-03.txt> (LISP EID Block) to Informational RFC

Sander Steffann <sander@steffann.nl> Thu, 15 November 2012 21:27 UTC

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Subject: Re: [lisp] Last Call: <draft-ietf-lisp-eid-block-03.txt> (LISP EID Block) to Informational RFC
From: Sander Steffann <sander@steffann.nl>
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Date: Thu, 15 Nov 2012 22:26:52 +0100
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Hi,

>> One thing we have to be very careful with here is that EIDs are not directly
>> allocated/assigned to end sites from this block. That will cause everyone to
>> independently find (different) PITRs for their space, which will make a mess
>> of the global IPv6 routing table...
>> 
>> Thanks,
>> Sander
> 
> I don't think that (by definition) there is any way to cleanly aggregate PI space.  Legacy advertisements are going to be done by their LISP provider and will have to match the endpoint's PI allocations.

Yeah, so RIR policy-making communities might want to allow for LISP-PA space for example. I don't think we can make assumptions about that here. The other side of this is then: why not use 'normal' address space? If it is going to be announced in the legacy global BGP table anyway by some LISP provider I can't see why an end-site would choose for the LISP block instead of the more flexible regular block (which can then also be used as EID space)...

Thanks,
Sander

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