ix
Cisco CRS-1 Carrier Routing System to Cisco CRS-3 Carrier Routing System Migration Guide
OL-13669-03
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:
• 16-slot line card chassis
• 8-slot line card chassis
• 4-slot line card chassis
The preface contains the following sections:
• Changes to This Document, page ix
• Obtaining Documentation, Obtaining Support, and Security Guidelines, page ix
Changes to This Document
Table 1 lists the technical changes made to this document since it was first printed.
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
Ta bl e 1 Changes to This Document
Revision Date Change Summary
OL-13669-01 October 2010 Initial release of the document.
OL-13669-02 December 2010 Adds 100GE support.
OL-13669-03 April 2011 Adds CRS-3 multishelf support.