Cisco CRS-1 - Carrier Routing System Router Migration Manual page 9

Preface
This guide describes how to upgrade a Cisco CRS-1 Carrier Routing System to a Cisco CRS-3 Carrier
Routing System. The second chapter describes how to downgrade your Cisco CRS-3 Carrier Routing
System back to a Cisco CRS-1 Carrier Routing System. Both chapters describe the upgrade or
downgrade process for each chassis type:
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The preface contains the following sections:
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Changes to This Document
Table 1
Table 1
Revision
OL-13669-01 October 2010
OL-13669-02 December 2010
OL-13669-03 April 2011
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:
http://www.cisco.com/en/US/docs/general/whatsnew/whatsnew.html
OL-13669-03
16-slot line card chassis
8-slot line card chassis
4-slot line card chassis
Changes to This Document, page ix
Obtaining Documentation, Obtaining Support, and Security Guidelines, page ix
lists the technical changes made to this document since it was first printed.
Changes to This Document
Date
Cisco CRS-1 Carrier Routing System to Cisco CRS-3 Carrier Routing System Migration Guide
Change Summary
Initial release of the document.
Adds 100GE support.
Adds CRS-3 multishelf support.
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