[ppml] Fw: IRS goes IPv6!

[Craig Huegen (chuegen)]

Chris Morrow wrote:

> what's interesting is that USPS (for instance) has disparate points of
> presense, not always with 'internal' connnectivity. So, even with a
> /32 they have to either: 1) use PA space inn some locations
> 2) setup a full back-side/internal network and route accordingly
> 3) convince everyone to leak /48's around

As another example, Cisco IT's network is arranged in the same way:  it
uses regional addressing and announces only a portion of its total
address space from various points of presence.

Some enterprises can get around this by using consistent vendors around
the globe; announcing more regional specifics with no-export provisions
and the larger block for export.  There are some important restrictions
using this model, but it does allow chunks to be sub-divided and
regionalized by the enterprise network.

/cah

---
Craig A. Huegen, IT Solutions Architect       C i s c o  S y s t e m s
IT - Intelligent Network Solutions                  ||        ||
Cisco Systems, Inc., 400 East Tasman Drive          ||        ||
San Jose, CA  95134, (408) 526-8104                ||||      ||||
email: chuegen at cisco.com       CCIE #2100      ..:||||||:..:||||||:..