CRS-1 IOS XR Upgrade

Hi,
Anybody have alredy work with a CRS-1? I would like to understand the procedures to install and upgrade IOS XR. It's a new device to be installed in a service provider to replace a GSR Router. The documents I search, I noticed that there's a big difference compare to the normal IOS and more difficult to understand the concepts.
Thanks.

Hello Paulo,
I agree that is quite different from classic IOS.
In IOS XR you can have a full upgrade or the installation of patches called SMU.
Similarly to unix or linux operating systems the process can be described as:
copying to file system the installation files in appropriate path
installation of packages
activation of the packages
there is no single image in IOS XR.
a good starting point can be
http://www.cisco.com/en/US/partner/docs/ios_xr_sw/iosxr_r3.7/getting_started/configuration/guide/gs37book.html
or
http://www.cisco.com/en/US/docs/ios_xr_sw/iosxr_r3.7/getting_started/configuration/guide/gs37book.html
Be prepared for some issues when connecting to other IOS based devices there are some default settings that are different.
You may be interested in the following white papers
http://www.cisco.com/en/US/partner/products/ps5763/prod_white_papers_list.html
http://www.cisco.com/en/US/products/ps5763/prod_white_papers_list.html
Hope to help
Giuseppe

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