Transport / Optics
Latest News / Articles
PBT / PBB-TE
PBT : Provider Backbone Transport
PBB : Provider Backbone Bridges
PBT was created to use Ethernet for connection-oriented purposes (similar to SONET/SDH, ATM and optical networks). It strips the complexity out of standard Ethernet by removing spanning tree, flooding and broadcasting. It works as follows:
Spanning tree, flooding and broadcasting are turned off.
Elements of Q-in-Q (IEEE 802.1ad), MAC-in-MAC (IEEE 802.1ah) and OAM (IEEE 802.1ag) are added. PBB-TE proposes additional extensions for path protection.
The control plane becomes centralised (as opposed to distributed). This simplifies things, as there is no need for distributed routing and signalling protocols (i.e. no need to run BGP, OSPF, IS-IS, RSVP-TE or LDP signalling versions of MPLS).
Although complexity is removed from the Ethernet control plane, it is added to the provisioning system, so the overall complexity remains the same.
Older News / Articles
Adva 800G CoreChannel. [GazettaByte]
Nokia adds 400G coherent optics across its platforms. [GazettaByte]
Japan breaks Internet speed record with 319Tbps data transfer. [Engadget]
BT takes deep dive into hollow-core fibre. [GazettaByte]
Enabling 800-gigabit optics with physical layer ICs. [GazettaByte]
100-gigabaud optics usher in the era of terabit transmissions. [GazettaByte]
Telecoms embrace 400ZR optics for IP-over-DWDM. [GazettaByte]
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