[ppml] question on 2006-2 v6 internal microallocation

Michael.Dillon at btradianz.com Michael.Dillon at btradianz.com
Thu Aug 31 11:11:35 EDT 2006

> > The Global Routing Table refers to the set of all 
> > prefixes (address blocks) announced in the default-free
> > zone of the public Internet via BGP4. Theoretically,
> > the routing table in a peering router of any member
> > of the default-free zone will consist of the "Global
> > Routing Table" plus the more detailed local routes which
> > are only found in that member's network.

>    its self referential...  default-free means no default
>    route. 

But the term being defined is "global routing table"
so referring to "default-free zone" is not self-referential.
The "global routing table" is a list of prefixes that
are being announced. This is why people refer to using
up "slots" in the global routing table. On the other hand
the "default-free zone" is more like a list of AS numbers.
There appears to be no near-term limit to the size of
the default-free zone other than the 32-bits in an AS number.

>there is zero implication wrt "global" in a default-free
>    network.

Not sure that I understand this. A default-free network is
not necessarily spread out over all parts of the globe. But
it does participate in the "default-free zone" which is 
a global concept. And it does consume one or more slots in
the "global routing table".

Some NANOG folks have created a NANOG Wiki to expand on the
existing NANOG FAQ. I have taken advantage of this by creating
two new entries, 
Since anyone else can join and edit the content of the wiki,
please feel free to adjust the wording of the definitions 
that I have posted there.

Please note, I didn't just copy what I write in one
of my emails. I don't claim to have the perfect
definitions yet. But perhaps a WIKI is a better way
for several people to work towards an agreed text.

--Michael Dillon

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