Cisco Systems A9KMOD80TR Manual De Usuario

F I N A L D R A F T — C i s c o C o n f i d e n t i a l

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Cisco ASR 9000 Series Aggregation Services Router Getting Started Guide

OL-17502-01

Chapter 1 Introducing to the Cisco ASR 9000 Series Aggregation Services Router

System Configurations

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MPLS TE Preferred Path: Preferred tunnel path functions let you map pseudowires to specific TE
tunnels. Attachment circuits are cross-connected to specific MPLS TE tunnel interfaces instead of
remote provider-edge router IP addresses (reachable using Interior Gateway Protocol [IGP] or Label
Distribution Protocol [LDP]).

High Availability

The router is intended for use in Enterprise networks that require high-availability. It is designed to
provide high MTBF (Mean Time Between Failures) and low MTTR (Mean Time To Resolve) rates. This
minimizes outages or and maximizes availability. The router achieves this using the following:

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Component redundancy

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Duplex power supplies

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Cooling systems

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Fault detection

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Management features

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High availability features

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Non-stop forwarding (NSF)—Cisco IOS XR Software supports forwarding without traffic loss
during a brief outage of the control plane through signaling and routing protocol
implementations for graceful restart extensions as standardized by the IETF, NSF requires
neighboring nodes to be NSF-aware.

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Process restartability (minimum disruption restart)

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Stateful switchovers

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In-service software upgrades

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MPLS TE FRR

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Bidirectional Forwarding Detection (BFD)

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Standard IEEE 802.3ad link aggregation bundles

System Configurations

The router runs Cisco IOS XR Software on the following standalone chassis types, available in AC or
DC versions:

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a 6-slot chassis

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a 10-slot chassis