Unanswered Question
Mar 5th, 2007
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hi, are there any Cisco products equivalent to Nortel's PBB/PBT technology?

to me, it seems like it's just L2VPN, but not through MPLS cloud.

what's the difference between the two, then?

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Overall Rating: 4 (1 ratings)
attrgautam Fri, 03/09/2007 - 04:46
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Dont think so cisco has any equivalent on the ONS platforms yet.

I think the diff comes in the fact that PBB/PBT uses ethernet as the transport mechanism unlike MPLS which uses IP over SONET/SDH/Eth etc to transport Ethernet. PBT gives the determinism (TE), QoS etc needed on a Layer 2 network with SONET like protection (50ms convergence) etc. Using PBB/MAC-in-MAC, it can keep service provider backbone scalable and secure by not receiving broadcasts from customers and reducing CAM tables.


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