Matt,
You brought up an excellent point regarding management gains with MPLS.
In many cases, I'd argue MPLS the preferable choice. But MPLS is not always
a viable choice, that VLAN can deliver viably.
What I mean by that is... There is not yet a complete/stable/tried-and-true
MPLS Open Source product on the market. (they exist but not recently updated
or supported). Many providers have used Open Source to their advantage.
Selecting MPLS may also mean migrating to a new foundation behind one's
network. From Open Source to Name Brand. I'm not saying thats a bad thing.
I'm just saying it might be more than a provider wants to do to accomplish
their goals. VLAN allows an ISP to just drop it in. The trade off is a
management headache. These comments are meant as a very generalized
comment, there are obvious many exceptions to the view..
Tom DeReggi
RapidDSL & Wireless, Inc
IntAirNet- Fixed Wireless Broadband
----- Original Message -----
From: "Matt Liotta" <[EMAIL PROTECTED]>
To: "WISPA General List" <wireless@wispa.org>
Sent: Tuesday, June 13, 2006 7:58 AM
Subject: Re: [WISPA] looking for a device
Charles Wu wrote:
It is worth noting that you lose the benefits of routing protocols when
you
bridge your network
The above is the number one reason against using VLANs for layer 2
transport. A second important issue to consider is management. Every
device from end-to-end where you want to deliver layer 2 transport
requires configuration if you use VLANs.
Both of the above issues are solved with MPLS. First, MPLS rides on top of
your layer 3 network giving you all the benefits of routing protocols.
Second, you only need to configure the edge device on either side of a
layer 2 virtual circuit. All the devices in-between --including protection
paths don't require additional configuration for each virtual circuit.
-Matt
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