Cisco CRS-1 - Carrier Routing System Router Getting Started Manual page 226

Reinstalling the Cisco IOS XR Software from ROMMON
Reinstalling the Software from an Image Located on a TFTP Server
The Cisco IOS XR software can be reinstalled directly from a .vm image located on a TFTP server.
Complete the instructions in this section exactly as described.
Restrictions for TFTP Services
TFTP services by some vendors (such as Sun Solaris) may not support files larger than 32 MB. Because
most Cisco IOS XR .vm images are larger than 32 MB, you may need to use one of the following options:
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Prerequisites
Before you begin, collect the following information.
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SUMMARY STEPS
1.
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4.
Cisco CRS-1 Series Carrier Routing System Getting Started Guide
A-16
Use a third party or freeware TFTP server that supports file sizes larger than 32 MB.
Download a patch from Sun Microsystems to correct this limitation (http://www.sun.com).
Install the Cisco IOS XR software from a .vm image located on the local flash disk. See the
"Reinstalling the Software from a .vm File Located on Flash disk1:" section on page
IP address of your router
Subnet mask of your router
IP address of the default gateway of your router
IP address of the TFTP server from which the software will be downloaded
The filename and directory of the .vm installation file that will be installed on your router
Back up the router configuration while still in EXEC mode.
Place both the standby RP and the primary RP in ROM monitor mode.
Prepare the standby RP:
unset BOOT
a.
unset TFTP_FILE
b.
EASYBAKE=0x100000000
c.
sync
d.
confreg 0x2
e.
reset
f.
On the primary RP, set the environment variables that define the IP locations of your router:
a. IP_ADDRESS=ip_address
b. IP_SUBNET_MASK=ip_address
DEFAULT_GATEWAY=ip_address
c.
Appendix A ROM Monitor Guide
A-20.