Re: [lisp] Mapping system observations

[Lori Jakab <[e-mail]>]

On 08/09/12 13:13, Damien Saucez wrote:
> After these measurements, we looked at the long term trends in
> the mapping system thanks to lispmon. The general trend is that
> the number of mapping increases (and more particularly the
> negative mappings) and that very few mappings use several
> RLOCs. Looking at this.

One of the reasons for more negative mappings may be some operational
changes that happened first on the ALT, and then the way DDT works. When
I started monitoring the beta network, all the 153.16.0.0/16 prefix was
considered EID space, and a Map-Request would either return a positive
reply, or nothing at all. Only queries outside 153.16/16 returned
forward-native. At one point that changed, and depending on active
registrations, negative Map-Replies were returned from within that
block. And with DDT, I think there is even more granular information
about prefix status.

-Lori