Broadband Network Gateway Command Reference for Cisco ASR 9000 Series Routers

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Updated:: July 1, 2021

Chapter: Preface

Preface
Changes to This Document
Communications, Services, and Additional Information

Preface

From Release 6.1.2 onwards, Cisco introduces support for the 64-bit Linux-based IOS XR operating system. Extensive feature parity is maintained between the 32-bit and 64-bit environments. Unless explicitly marked otherwise, the contents of this document are applicable for both the environments. For more details on Cisco IOS XR 64 bit, refer to the Release Notes for Cisco ASR 9000 Series Routers, Release 6.1.2 document.

The Preface contains these topics:

Changes to This Document

This table lists the changes made to this document since it was first printed.

Table 1. Changes to This Document
Date	Change Summary
March 2017	Initial release of this document.
July 2017	Republished for Release 6.2.2.
March 2018	Republished for Release 6.3.2.
March 2018	Republished for Release 6.4.1.
July 2018	Republished for Release 6.5.1.
January 2019	Republished for Release 6.5.2.
March 2019	Republished for Release 6.5.3.
April 2019	Republished for Release 6.6.2.
December 2019	Republished for Release 6.6.3.
February 2021	Republished for Release 7.3.1.
July 2021	Republished for Release 6.8.1.
July 2021	Republished for Release 7.4.1.

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