[44255] in North American Network Operators' Group
Re: MPLS in metro access networks
daemon@ATHENA.MIT.EDU (srihari varada)
Thu Nov 15 14:02:55 2001
Message-ID: <3BF411A1.E4040C5B@txc.com>
Date: Thu, 15 Nov 2001 14:04:01 -0500
From: srihari varada <varada@txc.com>
MIME-Version: 1.0
To: Irwin Lazar <ILazar@tbg.com>
Cc: nanog@merit.edu
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Appreciate your response. To intrepret what you said, perhaps with a bit of
extention, MPLS basically enables low cost realisation of such services as VPNs
(for business consumers, telecommuters and profesionals on the road) together
with low cost network maintenance. These would be compelling reasons to
consider.
Irwin Lazar wrote:
> MPLS is also useful as a VPN provisioning tool in the Metro space,
> especially to allow the provisioning of end-to-end PVCs regardless of Layer
> 2 transport. For example, a service provider could use MPLS-VPNs to link
> sites on its Ethernet MAN to sites on its DSL or Frame Relay services.
>
> Also, you may wish to check out Riverstone's collection of papers on
> Etherent, MANs and MPLS available at:
> http://www.riverstonenet.com/technology/ and the MPLS Resource Center -
> www.mplsrc.com
>
> Irwin
>
> -----Original Message-----
> From: srihari varada [mailto:varada@txc.com]
> Sent: Thursday, November 15, 2001 11:12 AM
> To: nanog@merit.edu
> Subject: MPLS in metro access networks
>
> Hello:
>
> I have heard some stressing the role of MPLS in metro access networks.
> It is difficult for me to visualize the need for it in them while it
> is not so difficult to understand the utility (load balancing and fault
> restoration etc.) of it in the metro backbone networks.
>
> To characterize metro access networks in the context, the following is
> provided:
> -- aggregates traffic from residential (arriving via broadband access
> links such as xDSL, Cable) and business consumers (arriving via
> broadband access links such as
> xDSL and high speed links such as Ethernet or SONET)
> -- funnels aggregated traffic to metro backbone networks for destination
>
> hosts in the local metro region or remote regions across the
> internet regional
> and backbone networks. Majority of such access networks are SONET/ATM
> based (I didn't come
> across any case of Gig Ethernet. However, I do not preculde it).
>
> Thus, there are two questions:
> -- Are there known RBOCs/ILECs and CLECs entrenching MPLS in the said
> network scope? (I do not see many major ILECs in the un-official MPLS
> service
> providers list being circulated but it may mean little)
> -- If so, what motivates them to do so? Any analysis of the driving
> forces is appreciated.
>
> Regards,
>
> Srihari Varada
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Appreciate your response. To intrepret what you said, perhaps with a bit
of extention, MPLS basically enables <i>low </i>cost <i>realisation </i>of
such services as VPNs (for business consumers, telecommuters and profesionals
on the road) together with<i> low</i> cost <i>network maintenance</i>.
These would be compelling reasons to consider.
<p>Irwin Lazar wrote:
<blockquote TYPE=CITE>MPLS is also useful as a VPN provisioning tool in
the Metro space,
<br>especially to allow the provisioning of end-to-end PVCs regardless
of Layer
<br>2 transport. For example, a service provider could use MPLS-VPNs
to link
<br>sites on its Ethernet MAN to sites on its DSL or Frame Relay services.
<p>Also, you may wish to check out Riverstone's collection of papers on
<br>Etherent, MANs and MPLS available at:
<br><a href="http://www.riverstonenet.com/technology/">http://www.riverstonenet.com/technology/</a>
and the MPLS Resource Center -
<br>www.mplsrc.com
<p>Irwin
<p>-----Original Message-----
<br>From: srihari varada [<a href="mailto:varada@txc.com">mailto:varada@txc.com</a>]
<br>Sent: Thursday, November 15, 2001 11:12 AM
<br>To: nanog@merit.edu
<br>Subject: MPLS in metro access networks
<p>Hello:
<p>I have heard some stressing the role of MPLS in metro access networks.
<br>It is difficult for me to visualize the need for it in them while it
<br>is not so difficult to understand the utility (load balancing and fault
<br>restoration etc.) of it in the metro backbone networks.
<p>To characterize metro access networks in the context, the following
is
<br>provided:
<br>-- aggregates traffic from residential (arriving via broadband access
<br> links such as xDSL, Cable) and business consumers (arriving
via
<br>broadband access links such as
<br> xDSL and high speed links such as Ethernet or SONET)
<br>-- funnels aggregated traffic to metro backbone networks for destination
<p> hosts in the local metro region or remote regions
across the
<br>internet regional
<br> and backbone networks. Majority of such access networks
are SONET/ATM
<br>based (I didn't come
<br> across any case of Gig Ethernet. However, I do not preculde
it).
<p>Thus, there are two questions:
<br>-- Are there known RBOCs/ILECs and CLECs entrenching MPLS in the said
<br> network scope? (I do not see many major ILECs in the un-official
MPLS
<br>service
<br> providers list being circulated but it may mean little)
<br>-- If so, what motivates them to do so? Any analysis of the driving
<br>forces is appreciated.
<p>Regards,
<p>Srihari Varada</blockquote>
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