Edge devices only store FIB/Mapping entries of things they are talking to, 
that’s a very tiny fraction of the 1B entries..


From: 5gangip [mailto:5gangip-boun...@ietf.org] On Behalf Of Lorenzo Colitti
Sent: Wednesday, February 21, 2018 10:38 PM
To: Tom Herbert <t...@quantonium.net>
Cc: int-area@ietf.org; i...@ietf.org; 5GANGIP <5gan...@ietf.org>; Mikael 
Abrahamsson <swm...@swm.pp.se>
Subject: Re: [5gangip] Fwd: New Version Notification for 

On Thu, Feb 22, 2018 at 10:51 AM, Tom Herbert 
<t...@quantonium.net<mailto:t...@quantonium.net>> wrote:
The hidden aggregation method is intended to make scaling possible.
Each assigned block results in on entry in mapping system so total
amount of state is num_hosts*num_blocks per host. e.g. in a network of
10M nodes with 100 blocks per host that's 1B entries in the mapping
system-- should be able to scale that.

I have a fundamental problem with the assertion "should be able to scale to 1B 
mapping entries" given that a) current routing hardware capabilities are three 
orders of magnitude away from that, and b) anyone on the Internet can mount a 
state exhaustion attack on the mapping system simply by originating a packet to 
any IPv6 address in the domain.

Personally I don't think this work should progress until we have line of sight 
to a system that can actually do that.
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