Transcript Packet Optimized Optical Transport Solutions

Packet Optimized Optical Transport Solutions
A Practical Design and Implementation Approach
Marc Teichtahl
[email protected]
[email protected]
Packet Optimized Optical Transport Solutions
Presentation overview
• Design overview
• Why packet rings ?
• Current designs
• Removing the transport layer
• DTP basics
• Robustness and resilience
• Aplanned case study
Packet Optimized Optical Transport Solutions
Design Overview
Design Brief
“effect the migration from traditional
transmission technologies to a next
generation platform optimized for the
transmission of purely packetized data”
Packet Optimized Optical Transport Solutions
Why packet rings ?
•Reduction in capital expenditure
•No more SDH/SONET ADM’s
•More efficient use of bandwidth
•statistical multiplexing and spatial resuse
•Single management infrastructure
Packet Optimized Optical Transport Solutions
Current Design
SDH Tributaries
ADM
OC-3
POS
OC-3
POS
ADM
ADM
ADM
Packet Optimized Optical Transport Solutions
Whilst robust, this design tends to be inefficient
when dealing with purely packetized data
•Dedicated protection time slots reserve half the
ring at all times.
•Fixed size Point to Point circuits provisioned
regardless of actual bandwidth use.
•Cost and complexity reduced as we remove
transport layers from the network.```
Packet Optimized Optical Transport Solutions
Working
Provisioned Circuit
ADM
ADM
Protection
Packet Optimized Optical Transport Solutions
Removing the transport layers
Today
Traditional
Tomorrow
IP
IP Over ATM
POS
ATM
IP
IP
IP-OG
SONET
ATM
SONET
IP
Optical
Optical
Optical
Optical
Lower Cost, Complexity, & Overhead
Packet Optimized Optical Transport Solutions
DPT Basics
Packet Optimized Optical Transport Solutions
2 Rings - Inner and Outer
•Data and control in opposite directions
•Both fibers used concurrently
•Accelerated control propagation for adaptive
bandwidth utilization and self-healing.
Packet Optimized Optical Transport Solutions
Framing
•Utilizes SONET/SDH framing
•Runs over all key fiber transport technologies
•Dark Fiber
•WDM
•SONET/SDH point to point and ring
Packet Optimized Optical Transport Solutions
Bandwidth Multiplication
•Spatial re-use - SRP
Traditional ring technologies use source stripping.
This is in efficient, SRP uses destination stripping.
Destination stripping allows the destination node
to remove the packet from the ring freeing up
bandwidth on other non-related paths.
Packet Optimized Optical Transport Solutions
Bandwidth Multiplication
•Dual Fiber
Both fibers carry “working” traffic.
This is unlike SONET which uses dedicated
protection bandwidth.
Implemented in an existing network DTP can yield
1:2 (x2) bandwidth multiplier.
Packet Optimized Optical Transport Solutions
Bandwidth Multiplication
•Statistical Multiplexing
No TDM and no provisioned circuits
Provides for statistical over subscription
Can handle elastic burst requirements
Packet Optimized Optical Transport Solutions
Robustness and Resilience
•Intelligent Protection Switching (IPS)
Proactive monitoring and and self-healing through
standard SONET/SDH overhead bytes.
50ms self-healing layer 1 wrapping
Protection switching hierarchy for multiple
concurrent failures
Packet Optimized Optical Transport Solutions
Robustness and Resilience
•Intelligent Protection Switching (IPS)
Doesn’t rely on SONET overhead bytes allowing for
use non-SONET infrastructure such as WDM
50ms IP restoration
Multi-layer aware, the router can now see all 3 layers
Packet Optimized Optical Transport Solutions
A planned case study
4 Phase implementation plan
•Single node SDH tributary
•Semi-Hybrid transport network
•Hybrid network
•Full DPT network
Packet Optimized Optical Transport Solutions
Single node SDH tributary
DPT
IP
SDH
Packet Optimized Optical Transport Solutions
Semi-Hybrid transport network
DPT
SDH
IP END TO END
DPT
Packet Optimized Optical Transport Solutions
Hybrid network
IP
only
IP only
Packet Optimized Optical Transport Solutions
Full DPT network
OC-12
OC-12
OC-12
OC-12
IP ONLY END TO END
TRANSPORT LAYER IS COMPLETELY TRANSPARENT
Packet Optimized Optical Transport Solutions
Amsterdam
Den Haag
OC-12
Rotterdam
OC-12
Antwerp
Brussels
OC-12
OC-12
Packet Optimized Optical Transport Solutions
Amsterdam
Den Haag
3 phase implementation
• Semi-hybrid trial
Amsterdam -> Brussels
Point to point
OC-12
Rotterdam
OC-12
Antwerp
OC-12
OC-12
• Hybrid trial
Amsterdam -> Brussels
Loop
•Full DTP
Full DTP loop
Brussels
Packet Optimized Optical Transport Solutions
Presentation available at
ftp://ftp.layerthree.com/pub/nanog16.ppt
email me
[email protected]