LAN - WAN Standards White Papers
Carrier Class Metro Networking
Overview
To gain a significant share of the market for data services, Metropolitan Area Network services need to meet or exceed the approximately 99.99% availability typical of legacy services such as leased lines, Frame Relay, and ATM. Metro services can readily be provisioned for this level of availability by using:
- Device-level and network-level redundancy to minimize the failure rate
- Auto-recovery mechanisms to ensure very fast service restoration times whenever failover to backup resources is required
If restoration is fast enough, there will be no perceptible interruption of the subscriber's data, video, or voice applications. In other words, fast restoration can make failure events transparent to the subscriber. SONET/SDH has traditionally set the benchmark for transport-level service restoration at 50 milliseconds or less. The goal for service providers is to leverage the redundancy deployed within the network by matching the restoration times of SONET/SDH throughout the multiple layers of network technology employed in the metro network.
| Publisher | RiverStone Networks | File Format | HTML & PDF |
|---|---|---|---|
| Date Published | July 2002 | Downloads | 123 |
| Format | White Papers | ||
| Topics | |||
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