Re: PI vs PA Address Space
- Date: Wed, 17 May 1995 11:23:49 -0700 (PDT)
- Posted-date: Wed, 17 May 1995 11:23:49 -0700 (PDT)
> This keeps the number
> of routes in the interdomain routing system at an
> acceptable level. The number of aggregated routes is
> much lower than the number that would be needed if
> each end-site's individual routes would need to be
> propagated throughout the whole interdomain routing
> system.
"Acceptable level"
Hints at a technological weakness in current router hardware.
May also be related to route propgation latencies.
> The reason for this arrangement is the load on the
> interdomain routing system. If the customer used the
> address space assigned to and aggregatable by their
> previous service provider when connecting to another
> service provider, their routing information could not
> be aggregated and would have to be propagated sepa-
> rately throughout the whole interdomain routing sys-
> tem.
Again, hints at a technological weakness in current router hardware.
May also be related to route propgation latencies. At no point does
this address the scaling problems that IPv6 (or followons) will
bring. (There are some who will retire before we need a replacment
for IPv4, but I'm not one of them)
> At the time of this writing there is growing concern
> among the operators of major transit routing domains
> in the Internet that the number of individual routes
> and their associated information is growing faster
> than the deployed routing technology will be able to
> handle. Parts of the interdomain routing system are
> already operating at capacity.
>
> It has been argued that PI addresses will quickly
> become be totally useless since the Internet routing
> system will not be able to support them any longer.
A very clear indication that there is a problem in router technology.
>
> Consequently it has been suggested that the regional
> IRs should immediately stop allocating and assigning
> PI space and only allocate PA space to service
> providers.
So there is the suggestion that policies be created/enforced to
accomodate problem routing technology? Is this really what we
want to do?
--bill
