[rrg] BGP scaling limit?

[Danny McPherson]

On Jan 6, 2009, at 4:23 PM, Tony Li wrote:
>
>
> I know that the internal tables are always a pain, but since we have  
> to deal
> with the global issues, the internal, private growth (self- 
> inflicted ;-) has
> to necessarily be out of scope for RRG.

That's quite odd to me, considering by today's definitions
"internal [BGP] tables" are where the routing scalability and
stability are it's worst - today, and unquestionably, the first
place things will break IF/WHEN they do, as a result of an
inter-domain routing protocol architecture that forces either
full-mesh or hierarchies such as route reflection that themselves
introduce additional paths and state in the network (even with
implicit aggregation effects).

And they're not going to break because of a 100k unique
internal-only routes, they're going to break because of
an order or magnitude or more paths (and all of their overhead)
- paths introduced as a result of "global issues" and solutions
that focus on solely minimizing DFZ size, rather than looking
at where the problem is actually worst - today.

-danny