The MPLS WG Archive[Date Prev][Date Next][Thread Prev][Thread Next] [Date Index][Thread Index][Author Index][Subject Index] ATM-LSR do they use OSPF/IS-IS or PNNI??
Hi Richard, Please read my post carefully. Internet services are generally intended to mean "best effort". In contrast VPN services are supposed to carry some kind of added value. In other words, I fully accept that IP VPNs should make more money than a basic Internet service. But as I understand it, the added value from IP VPNs either comes from security (whether this is "isolational" in nature like an ATM or Frame Relay VPN, or "truly secure" as in the case of an ecrypted ATM or IPSec VPN is up to the user), or from "perceived service enhancement". The latter could be via a CoS mechanism, which MPLS can potentially offer, or from a hard QoS mechanism which can only be offered from... a: A TDM mechanism (like SONET/SDH, which is expensive). b: A native ATM service. c: An over-provisioned stat mux service (eg. IP), which is also expensive in the long term. I know that Orchestream's core business is based on the provision of services over an MPLS core, so this may be akin to asking a barber if he thinks I need a haircut, but is there any evidence that IP VPN services are "truly profitable" (as opposed to "press release" profitable)? the problem is that asking most SPs this question will result in "sorry, this is very confidential information" responses. I'm not trying to bang a vendor drum here, I'm truly interested because of the fact that about a dozen European SPs are technically bankrupt from being too dependent on IP services ever making money. Cheers, Geoff At 19:38 18/04/01 +0100, Donkin, Richard wrote: > > >> -----Original Message----- >> From: Geoff Bennett [mailto:geoff.bennett@marconi.com] >> Sent: 18 April 2001 11:15 >> To: MP LS; mpls-ops@mplsrc.com; mpls@uu.net >> Subject: Re: ATM-LSR do they use OSPF/IS-IS or PNNI?? >> >> >> Hi Niels, >> >> There may be some confusion arising depending on how you >> configure the ATM >> switch. In effect there are three modes of operation for >> this device... >> >> 3. Ships in the Night (SIN). In this case, both ATM and MPLS Control >> Planes operate simultaneously. ATM signalling happens on VCI >> 5, and MPLS >> signalling on VCI 32. VCs that are set up as a result of >> signalling are >> "owned" by one or other of these control planes. SIN would allow an >> operator to continue to run high revenue voice services (and >> maybe existing >> Frame Relay or native ATM services...they make money too) >> over the ATM >> "character" of the switch. They can then run the loss-making Internet > ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ >> services over the MPLS character. >^^^^^^^^^^ > >Very amusing... I'm sure this was just flame-bait, but first of all, MPLS >supports IP services, not just Internet traffic, and you can of course run >highly profitable IP VPN services over MPLS. > >Ultimately, ATM/FR services (as seen by the customer) may well be carried >over an MPLS core, particularly as MPLS becomes one of the key signalling >mechanisms for all-optical core networks, but since much of the traffic >running over ATM/FR is actually IP, it may be simpler to deliver IP VPNs >directly to the customer premises. > >> Cheers, >> Geoff > >Richard Donkin >T: +44 (0)20 7348 1507 >Orchestream >Avon House, Kensington Village, Avonmore Road, London W14 8TS >T: +44 (0)20 7348 1500 F: +44 (0)20 7348 1501 >www.orchestream.com > > >-- >This communication contains confidential information intended solely for the use of the individual/s and/or entity or entities to whom it was intended to be addressed. If you are not the intended recipient, be aware that any disclosure, copying, distribution, or use of the contents of this transmission is prohibited. If you have received this communication in error, please contact the sender immediately, delete this communication from your system, and do not disclose its contents to any third party, or use its contents. Any opinions expressed are solely those of the author and do not necessarily represent those of Orchestream Ltd or its group of companies unless otherwise specifically stated. > >------- >The MPLS-OPS Mailing List >Subscribe/Unsubscribe: http://www.mplsrc.com/mplsops.shtml >Archive: http://www.mplsrc.com/mpls-ops_archive.shtml > ================================================================ Geoff Bennett Tel: (33) 497 21 43 62 Director of Technology, OCTO Fax: (33) 497 21 43 50 Marconi Gaia - Bat. E email: geoff.bennett@marconi.com BP 123 06903 SOPHIA ANTIPOLIS FRANCE ================================================================
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