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robman 12/5/2012 | 3:54:06 AM
re: BT Likes Nortel's New Ethernet Flavor There are some very smart people still in Nortel, the company saw massive downfall in last few years, not because of the product deficiencies, but some very incompetant people were able to make to upper management (total screw up). Its a case of mismanagement.

From:
R.
digits 12/5/2012 | 3:54:06 AM
re: BT Likes Nortel's New Ethernet Flavor Will other SDH carriers follow BT's interest in Nortel's PBT?

Or is BT out on its own here?
OldPOTS 12/5/2012 | 3:54:05 AM
re: BT Likes Nortel's New Ethernet Flavor I believe BT is probably out on its own.

Without VPNs (IP->L3) a lot of service differentiation will be lost.

OP
metroman 12/5/2012 | 3:54:03 AM
re: BT Likes Nortel's New Ethernet Flavor I think that the idea is that they use technologies such as PBT to backhaul traffic to IP routers.

I do also think that the whole PBT concept is flawed.

Let's say I am a BT competitor in the UK - I will be saying to my customer "You know that BT is selling you a servive that is built using LAN switches, is essentially proprietary and is limited in the services it offers (no multipoint, multicast, broadcast)."

This is the best news any of BTs competitors have had in years.

Patently Bad Technology

Metroman
gigeguy 12/5/2012 | 3:54:02 AM
re: BT Likes Nortel's New Ethernet Flavor Even this gigeguy thinks PBT is for the birds:

1. VPLS is highly superior - more efficient on the wire, supports multipoint and broadcast services, faster recovery from MPLS fast reroute, traffic engineering and QoS support, etc.

2. Nortel is only supporting this because their attempt at an MPLS/VPLS edge router, Neptune, was a total bust.

3. BT thinks this will be cheaper than MPLS, well sometimes you get what you pay for. Five 9s reliability requires the same HW and SW mechanisms (redundant power supplies and crossbar switches, nonstop software features including SW upgrades, etc.) regardless of what protocols are used. PBT done as a reliably as MPLS won't cost much less.

4. As metroman notes, this is very good news for BT's competition.
fiber_r_us 12/5/2012 | 3:54:02 AM
re: BT Likes Nortel's New Ethernet Flavor BT is way out on a limb if they are serious about this. I dont know of any other major provider thinking like this (the US has all already gone to MPLS). And, I don't see how it provides a differentiated service from other other carriers that offer similar Ethernet connectivity. In fact, it misses the boat on L3VPNs.

Using PBT to "backhaul to a router" also seems like a poor reason to deploy PBT as that could have been done over NG SDH gear or numerous other ways (Ethernet backhaul is done today and doesn't take PBT or need that kind of scale).
light-headed 12/5/2012 | 3:54:01 AM
re: BT Likes Nortel's New Ethernet Flavor BT = Old AT&T (not SBC)

1. declining revenue
2. bad management
3. no wireless
4. no local loop
5. no clue

Similar long, slow death spiral... 21cn will not prevent the inevitable. Only the British Government will keep them from disappearing.
fiberous 12/5/2012 | 3:54:00 AM
re: BT Likes Nortel's New Ethernet Flavor BTW,

PBT really stands for Paul Botroff's Thoughts
fiberous 12/5/2012 | 3:54:00 AM
re: BT Likes Nortel's New Ethernet Flavor Sad And Stupid Idea
lightingrod 12/5/2012 | 3:37:50 AM
re: BT Likes Nortel's New Ethernet Flavor Hey MPLS Heads you all sound like a bunch of people afraid you may need to learn something new.

Sadly MPLS will not stop world hunger!!!

Some thing better always (always) comes along. It's normal life in technology worl.

If you don't like it then go work at McDonalds
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