Cisco CRS-1 - Carrier Routing System Router Getting Started Manual page 242

Information About ROM Monitor Software
The upgrade and downgrade procedures for ROM monitor are the same. During the upgrade or
downgrade process, you select the firmware that will be used for ROM monitor. This firmware can
represent an upgrade or a downgrade. The firmware must be compatible with the hardware, but it need
not be a later version of the ROM monitor already installed. During an upgrade or downgrade, the
firmware is copied into hardware EEPROMs in the router.
ROM monitor operates on every node within the router. For most upgrades, we recommend that you
upgrade ROM monitor on all nodes. However, the software does allow you to upgrade a single node, and
this is useful when moving a card between two routers or adding a card that is not running the preferred
ROM monitor version. When you upgrade a single node that uses ROM monitor in both the CPU0 and
SP modules, such as a line card node, we recommend that you upgrade both modules to the same ROM
monitor version.
The ROM monitor firmware is distributed in a compressed (*.tar) file. The individual filenames are:
rommon-hfr-ppc7450-sc-dsmp-A.bin
•
rommon-hfr-ppc7450-sc-dsmp-B.bin
•
rommon-hfr-ppc7455-asmp-A.bin
•
rommon-hfr-ppc7455-asmp-B.bin
•
rommon-hfr-ppc8255-sp-A.bin
•
• rommon-hfr-ppc8255-sp-B.bin
The filenames are fixed and do not include version information, which is stored within the file and in the
tar file name. When upgrading ROM monitor, it is best to decompress the tar file only when you are ready
to install the file. This way, you can be sure which version you are installing. The format for the tar file
name is:
rommon-version.tar
The version component of the filename is a version number such as 1.19.
To prepare for a ROM monitor upgrade, the tar file must be copied to a workstation that can decompress
the tar file. Next, the individual files must be copied to the root directory of a router device (for example,
disk0:).
During a ROM monitor upgrade, the software detects each card type and automatically selects the correct
file for the upgrade on that card. ROM monitor is typically updated less frequently than the runtime
router software. To see if the ROMMON for your router needs to be updated, refer to the ROMMON
version information at the following URL:
http://www.cisco.com/cgi-bin/tablebuild.pl/crs1rommon
If only one ROM monitor tar file is listed, there are no updates available. If more than one ROM monitor
tar file is listed, compare your ROM monitor version (show diag command) with the version numbers
posted.
If multiple tar files are listed on the web site, the software distribution website will specify whether only
ROMMONB or both ROMMONA and ROMMONB should be upgraded. When you upgrade only
ROMMONB, the router can still use the unmodified ROMMONA if the ROM monitor upgrade is
interrupted or fails for any reason. If the new ROM monitor is not compatible with the older installed
version, both ROMMONA and ROMMONB must be upgraded.
Cisco CRS-1 Series Carrier Routing System Getting Started Guide
B-2
Appendix B Upgrading and Downgrading ROM Monitor Software