1. Beyond 10G
Hong Liu
February 14, 2005

2. Outline Today’s landscape and Future Direction
10G and 40G
Ethernet vs. Sonet
Juniper’s Core Platform and OC-768c Solution
Core Routing Platform Roadmap
OC-768c and engineering challenges
Beyond 40G

3. Today’s Landscape True 10G roll out and deployment:
10GE customer and IntraPoP connections
OC-192c/STM-64 InterPoP circuits
DWDM transport
40G (OC-768c) at very early stage
WDM transport gear available, with some deployed
One vendor with very expensive solution in trial
40GE/100GE? standards yet to get off the ground

4. Future Directions Long term – convergence is key
IP over MPLS, clear winner
Ethernet with transport-friendly features?
SONET with Ethernet cost/commodity advantages?
Near/Medium term – each has its place
Ethernet lacks OAM for transport/larger network
SONET expensive for intra-cluster
Virtual Concatenation, Link Capacity Adjustment Scheme and Generic Framing Procedure allows Ethernet over SONET

5. Applications Bigger bandwidth increments mean fewer devices to manage
IntraPoP connections
For short distances 40G is feasible now
Ethernet’s lack of OAM not a barrier
InterPoP connections
40G single wavelength, over long distances requires fiber laid in the last few years
DWDM with many 10G wavelengths to extend the usable life of installed fiber
SONET is only near-term choice, due to OAM requirements of transport providers

6. Core Routing Platform Roadmap
T-series platforms were built to accommodate multiple generations of PFEs
Switch fabric capacity upgrades
Packet forwarding engine technology upgrades
Next-generation, 40G PFE in development now
Leverages design points from current architecture
Straightforward extension of existing 20G chipset

7. Juniper’s OC-768c Designed to work with installed T640s
OC-768c = Next step for ultra-high BW pipes
= deployment of 10G circuits
= aggregate existing 10G circuits (link bundling)
2005 / 2006 and beyond = deployment of OC-768c
Initial offering will be SR (2km), link limited primarily by fiber chromatic dispersion
Could be extended to IR (40km), link limited by chromatic and polarization mode dispersion.

8. Beyond 40 Gigabit Speeds Engineering lessons: Engineering challenges:
Multiplexing is most cost-effective solution, at least initially
Engineering challenges:
Forwarding with intelligence at these speeds
Memory requirements – bandwidth and capacity
Power and cooling issues – temperature stability of optics
Chromatic and PMD (polarization mode dispersion) compensation are needed for links beyond 40G
Fiber capacity/readiness for more than 40G using single lamda
As you approach technological limits, cost rises asymptotically

9. Thank you! Hong Liu hongliu@juniper.net