The MPLS WG Archive

[Sam Ford <samskford@yahoo.com>]

Hello,

I have the following questions on MPLS based VPN:
- One of the advantage over traditional VPN
  is cited as elimination of full mesh overlay
  when connecting multiple sites.
  Then, when does LSP setup in MPLS domain
  supporting a particular VPN?
  If it needs to be set up statically when configuring
  VPN, it doesn't seem to be different from
traditional
  mesh overlay.
  Is it set up when traffic is generated?
- Does MPLS based VPN require the same level
  of encryption as with traditional IP VPN?
  If not, how is it protected from unathorized
  access to data or tapping?

Thanks in advance,
-SF

-----Original Message-----
From:	Irwin Lazar [SMTP:ILazar@tbg.com]
Sent:	Tuesday, September 25, 2001 10:35 AM
To:	mpls@UU.NET
Subject:	RE: MPLS:what is the industry people's
reaction!!

Here are a couple of scenarios where MPLS-based VPN
services offer
tremendous advantage (IMHO):

- An enterprise wishing to connect their sites via any
L2 mechanism with
guaranteed performance levels.  For example, take a
site with a 100MB
Ethernet connection to a service provider, and allow
it to establish a
private link to another site that has an ATM OC-3 to
the same provider.  For
further complexity, assume both sites are using
private IP addressing.

- A medium size enterprise wishing to build a fully
meshed network without
having to configure dozens of PVCs at each end point.

- An ISP that wants to offer private line transport
services over its
existing infrastructure as a value-ad service.  They
want to be able to
offer this private line option over a variety of L2
transport mechanisms so
that they aren't reliant on ATM.

Irwin


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