This preface explains the objectives, intended audience, and organization of this
Cisco CRS Carrier Routing System 16-Slot Line Card Chassis Enhanced Router Site Planning Guide
, referred to in this document as the
site planning guide
, and describes the conventions used in the document.
This guide describes the basic facility requirements, such as floor space, power requirements, and environmental requirements, for the Cisco CRS Series 16-Slot Line Card Chassis Enhanced. This guide is intended to help you plan the sites where the chassis will be installed. It should be used with Cisco site planning coordinators and site inspectors, well in advance of the delivery of the chassis.
This guide is intended for anyone who plans the facilities, including space, floor weighting, power, cooling, cabling, delivery, and storage, for the installation of a Cisco CRS 16-Slot LCC Enhanced router.
This guide contains the following chapters and appendixes:
Table 1 lists the technical changes made to this document since it was first developed.
Table 1 Changes to This Document
Added support for new 2x100GE-FLEX-40 PLIM.
Added updates to support the Cisco CRS-X 400G back-to-back and multishelf systems, which include new CRS-16-FC400/M switch fabric cards.
Added updates to support the Cisco CRS-X, which includes new line cards, switch fabric cards, and PLIMs.
Minor text, illustration, and specification updates.
Initial release of this document.
This document introduces the Cisco CRS 16-Slot Line Card Chassis Enhanced router. The Cisco CRS 16-Slot Line Card Chassis Enhanced router includes the following new features:
The mid-plane on the Cisco CRS 16-Slot Line Card Chassis Enhanced router is redesigned to support 400G per slot.
A new reduced height Power Shelf has been introduced for the Cisco CRS 16-Slot Line Card Chassis Enhanced router, which results in larger space for air intake (at the bottom of the chassis). This increases the overall cooling efficiency of the chassis.
A new Alarm Card has been introduced for the Cisco CRS 16-Slot Line Card Chassis Enhanced router that is designed to fit in the new reduced height Power Shelf.
The Cisco CRS 16-Slot Line Card Chassis Enhanced router Fan Controller monitors and controls nine cooling fans per fan tray using Pulse Width Modulation (PWM). This new Pulse Width Modulation (PWM) controlled Fan Tray gets power directly from the mid-plane. The Cisco CRS 16-Slot Line Card Chassis router used Voltage Controlled Fan Trays.
The Cisco CRS 16-Slot Line Card Chassis enhanced router removes the zone circuit breaker and power-zoning requirement.
Obtaining Documentation, Obtaining Support, and Security Guidelines
For information on obtaining documentation, obtaining support, providing documentation feedback, security guidelines, and also recommended aliases and general Cisco documents, see the monthly
What’s New in Cisco Product Documentation
, which also lists all new and revised Cisco technical documentation, at: