Cisco Systems XR 12406 manual Alarm Cards, Switch Fabric Redundancy

Chapter 1 Cisco XR 12406 Router Overview

Line Cards

Switch Fabric Redundancy

Equipping the router with two CSCs provides data path, scheduler, and reference clock redundancy. The interfaces between the line cards and the switch fabric are monitored constantly. If the router detects a loss of synchronization (LOS), it automatically activates the data paths of the redundant CSC, and data flows across the redundant path. The switch to the redundant CSC occurs within 0.5 second, with little or no loss of data.

Note The enhanced Cisco XR 12406 chassis (XR-12000/6 configured with 12406/120 fabric option) ships with redundant CSC which is required to maintain High Availability for the system.

Alarm Cards

The Cisco XR 12406 Router has two alarm card slots (Figure 1-5). Each alarm card performs the following function or indicates the following condition:

•Alarm output

•CSC status

•SFC status

•Alarm card status

•Power source and power entry module status

•Alarm relay contacts

The entire alarm function has been implemented on redundant alarm cards with OIR maintenance (hot-swappable) functionality.

	Cisco XR 12406 Router Installation Guide
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