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Juniper Simplifies DCI with Innovative Coherent DWDM Line Card

by Juniper Employee ‎09-13-2017 12:45 PM - edited ‎09-13-2017 12:48 PM

Over two decades ago, when a friend of mine visited his parents in a remote countryside village in China, he had to first take train from Beijing to the provincial capital, then take a crowded coach on bumpy country roads to the county’s capital, next take passenger ship, and finally walk dozens of miles on the mountainous road to his parents’ village. The journey involved many forms of transportation, was exhausting, and took three days. Additionally, the logistics was difficult to manage and coordinate.


This problem also exists in networking industry. The explosion in data center traffic growth due to distributed applications such as distributed cloud applications, video streaming, and mobile applications is making it necessary to interconnect geographically dispersed locations to create a single hyper-scale logical resource pool. To achieve this interconnectivity, cloud operators have been deploying isolated packet and dense wavelength-division multiplexing (DWDM) equipment as separate domains with independent management tools. Just like my friend visiting his parents in the remote village, this infrastructure involves a diverse set of transportation domains and is difficult to manage.


The good news is that Juniper is now providing a perfect solution to this problem with the newly released Coherent DWDM Line card. Integrating DWDM into Juniper Networks® QFX10000 line of Switches (QFX10008 and QFX10016) eliminates these operational headaches by bringing packet and optical into a converged architecture, reducing space and power consumption, and eliminating the high cost of external transponder shelves.


The following graph illustrates how the traditional DCI can be simplified by integrating DWDM into Juniper Networks® QFX10000 line of Switches with this DWDM Line card.DCI_Collapse.PNG

 And here is an image of the actual Coherent DWDM Line card.VoodooLineCard.PNG

This innovative and feature-rich DWDM Line card offers density, performance, and economics for cloud-scale applications, simplifies cloud deployment by collapsing spine/DCI into a single network, and provides consistent management interface for both packet and optical using Junos OS. The follows are the feature highlights:


  • 19.2 Tbps per system with QFX10016
  • 25.6 Tbps per fiber pair with 128 channels
  • 1.2 Tbps per line card; 6x200 Gbps per line card
  • 1.2 Tbps Packet Forwarding Engine (PFE) with deep buffers and large forwarding information base (FIB)
  • 1.2 Tbps line rate IEEE 802.1AE Media Access Control Security (MACsec) encryption across all ports
  • Up to 12x100GbE, 256-bit encryption Superior Performance for Metro or Long-Haul Applications
  • Flex modulation to support both metro and long haul on the same line card
  • 120 km without amplification
  • 4,000 km with amplification
  • 200 Gbps DP-16QAM (approximately 1000 km)
  • 150 Gbps DP-8QAM (approximately 2,000 km)
  • 100 Gbps DP-QPSK (approximately 4,000 km)
  • Configurable modulation
  • Compatible and interoperable with Juniper’s existing DWDM Line cards on PTX and MX routers
  • Alien wavelength support over third-party line system
  • YANG data model
  • Junos OS CLI and SNMP
  • Supports IP over DWDM for L2 or L3 applications

With so many features and benefits, as soon as this innovative DWDM Line card is released, customers immediately fall in love with it. See Fredrik "Hugge" Korsbäck's blog New toys – 200G DWDM in Juniper QFX10000.


Thanks to the recent rapid development in China’s high speed railway infrastructure, now my friend just needs to take the train from Beijing directly to his home village, and his parents will be there at the station welcoming him with big smiles – there was a new station built near his parents’ village, so no more alternating between transportation modes, no more logistics hassles, and no more exhaustion.


The same is true with the release of Juniper’s DWDM Line card on QFX10000 line of Switches. The end result: happy customers.

Juniper Networks Technical Books
About the Author
  • I started work at a router company, moved to an optical company adding MPLS, moved to mobility company, moved to a packet optical company who got bought by a router company. Full Circle!!
  • David is a Distinguished Engineer in Juniper's Optical Engineering team, having joined Juniper as part of the acquisition of WANDL Inc in January 2014. David is working on routing and optimisation software for multilayer networks to help plan and design networks using the new generation of packet-optical technology from Juniper. In "previous lives", David worked on soliton propagation; diffractive optic device design and network design software and algorithms in the Optics Research Group in BT's Adastral Park Laboratories in Ipswich. He holds a BA and PhD in Mathematics from the University of Cambridge.
  • Steven Keck is a Distinguished Engineer within Juniper's Optical Engineering team where he is responsible for architecture and implementation of packet-optical solutions for routing and switching platforms. Steve has been designing telecom hardware and optical systems for nearly 20 years. Prior to Juniper, he has held positions at Stanford Telecom, StrataLight Communications and Cisco Systems. He holds a B.S. in Computer Engineering from University of the Pacific.
  • David Song is a Sr Staff Engineer within Juniper's Optical Engineering team where he is responsible for the design of packet-optical solutions for routing and switching platforms. He joined Juniper in 2004 and has been designing networking software in control plane and data plane on various platforms. Prior to Juniper, he held various software development positions at Ciena and Nortel Networks. He has several US patents.