[ppml] 2005-1:Multi-national Business Enablement
jeroen at unfix.org
Fri Apr 22 14:43:03 EDT 2005
On Fri, 2005-04-22 at 09:25 -0400, Wettling, Fred wrote:
> ARIN Policy Proposal 2005-1 removes one of the current obstacles for the
> real-world deployment of IPv6 by multi-national businesses. Global
> enterprise address management is critical. Global businesses are also
> challenged with unique routing policy and multi-homed sites which are the
> criteria for assignment of an AS Numbers (ARIN Policy Section 5). Beyond
> multi-homing at multiple sites, businesses also concurrently deal with
> dozens of service providers around the planet in the deployment of IP-based
> enterprise WAN backbones.
Let's make a nice normal typical example of a 'multi-national business':
Thus there is a company lets name it Example Corp.
This company has offices (read: sites) all around the world (New York,
Amsterdam, Paris, London, Tokyo, Canberra, Seoul, Lima, etc). Every site
has their own admins so they want a /48 per site, just like every
enduser with a dsl line, cellphone, or whatever connectivity method gets
a /48. As this company is large it also has a lot of employees, and
these like to dial in to the company network using VPN's. Thus everytime
a employee connects, this employees network wants to get connected to
the company network and thus the VPN gets a /48 routed over it too.
Effectively this company will thus need a /32 or similar large sized
block, just like Google and Microsoft amongst others already have.
Now a fun part. The site in Lima doesn't have that much connectivity, it
has only a 2mbit SAT uplink. The site in Paris is also not very well
connected, only a 10mbit leased line.
The webservers need a 1Gbit connection, because a lot of French people
are connecting to it etc. Those webservers are located in New York.
Now where are you going to do your BGP announcements?
Do remind that the company gets a single /32 and are not supposed to be
announcing multiple /48's out of that, as that will break the whole idea
of aggregation. Also keep in mind that if you only announce it in New
York that traffic from the employees summer house in Nice will flow over
New York to Paris, introducing a nice 160ms latency for his SSH
connection. If you announce it in Paris, without limiting it to the
peers, because then you introduce the latency again, then a lot of
french people and surrounding areas will go over that teeny 10mbit
leased line, while they all might want to download that super cool new
product advertisement movie, which does fit over the 1Gbit pipe at the
webservers but does not fit over the 10mbit leased line...
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