Discussion

Powerful configuration editor and batch configuration activation
The JUNOS configuration editor supports command completion and text files
and allows you to return to previous configurations. Activating JUNOS configurations
is a batch process, and interdependent configuration segments take effect
at the same time.
Hard disk in the router
Having a built-in hard disk provides storage on the router for software images
needed for software upgrades, core dumps, and JUNOS documentation, which
is accessed with online help.
The first version of JUNOS software, released in 1998 with the first router, the M40
router, focused on features for large-capacity Internet service provider (ISP) and telephone
company (telco) networks. Like any network operating system, additions are
regularly being made to the software to incorporate new technologies, protocols, and
feature sets. The JUNOS software is updated four times per year. JUNOS Cookbook
was written for Release 7.4, which shipped at the end of 2005. You will find, however,
that most of the recipes in this book also work on earlier software releases, and
they should continue to work on future releases. All recipes in this book were developed
on M7i or J2300 routers. And, except where noted, they should run on any
Juniper Networks J-series, M-series, and T-series routing platform. I have indicated
when I use features that are available only with certain software releases or hardware.
Given the diversity and complexity of the JUNOS software, this book cannot cover
the entire operating system. Instead, JUNOS Cookbook consists of a collection of
sample router configurations for the proper installation, configuration, and optimization
of your Juniper Networks routers and is focused on helping you set up the common
components of your router: the network interfaces and the routing protocols
themselves.
JUNOS Cookbook is not intended to replace the detailed feature information available
on the Juniper Networks web site (http://www.juniper.net). This book doesn’t
have the space to provide details about how particular protocols actually work, and
you can find this information in the Internet Engineering Task Force (IETF) Request
for Comment (RFC) and Internet draft documents (http://www.ietf.org), as well as in
a wide variety of books.
I welcome feedback from readers. If you have comments, suggestions, or ideas for
other recipes, please let me know. If there are future editions of the JUNOS Cookbook,
I will include any suggestions that I think are especially useful. You can reach
me at aviva@juniper.net.
xviii | Preface
This is the Title of the Book, eMatter Edition
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