Reliability and Resiliency

The LE-311v delivers carrier class reliability and availability that both metro and enterprise operators expect and demand for today’s business-critical network services environment. LE-311v resiliency and reliability are based on three major features:

• Modularized LE-OS software architecture with a real-time kernel
• Industry-leading resiliency with Rapid Spanning Tree Protocol (IEEE 802.1w) that can be configured to support sub-50 millisecond failover time*
• Industry-standard IEEE 802.3ad Link Aggregation

* RSTP performance will vary by size and configuration of the network. Sub-50 millisecond failover time based on a test configuration with a 7-node ring and 8,000 MAC addresses. For more information on this test, see World Wide Packets White paper entitled “Network Resiliency”.

The LE-OS operating system implemented in the LE-311v is architected with a real-time kernel, delivering reliability and high availability by protecting against complete operating system failures.

LE-311v delivers industry-leading resiliency with an advanced optimization of the Rapid Spanning Tree Protocol (IEEE 802.1w). The LE-OS implementation in the LE-311v can be configured to deliver less than 50 millisecond failover times to support time-sensitive applications such as video and voice. The rapid failover capability in the LE-311v enables deployment of time-sensitive applications with the same service level guarantees as SONET/SDH optical rings while at the same time being fully compatible with Spanning Tree (IEEE 802.1D) and Rapid Tree Spanning Tree (IEEE 802.1w) Protocols.

LE-311v also supports IEEE 802.3ad Link Aggregation, which facilitates the bundling of several physical ports together to form one logical port. LE-311v Link Aggregation is a standard implementation of 802.3ad and delivers both interoperability and resiliency of the connection even if connectivity with one physical port is interrupted. LE-311v Link Aggregation support includes the Protection Link Aggregation feature that delivers a “hot standby” failover mechanism which provides a near wire-speed protection mechanism for the protected link aggregation group. When the failed link is restored, reversion to the initial configuration is programmable. LE-311v supports ingress policing across a link aggregation enabling more efficient utilization and sharing of bandwidth among ports.

Figure — RSTP Ring with Sub-50 msec Resiliency

• Sub-50 msec failover and restore
• QoS-aware for maximum protection
• All services, including unicast and multicast flows, are protected

Continue

• Introduction
• Provider Backbone Bridging (PBB-TE)
• MPLS Services
• Proven LE-OS Operating System
• Carrier Class QoS
• Reliability and Resiliency
• Advanced Security
• Carrier Class OAM

PDS-0003-001 Rev B.1