C H A P T E R 10 Troubleshooting Upgrading And Downgrading Software; Verifying And Troubleshooting The Rom Monitor Version - Cisco CRS-1 - Carrier Routing System Router Troubleshooting Manual

Verifying and Troubleshooting the ROM Monitor Version

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Verifying and Troubleshooting the ROM Monitor Version
The ROM Monitor (ROMMON) software is known by many names such as boot software and boot
image.
Although it is distributed with routers that use the Cisco IOS XR software, ROMMON is a separate
program from the Cisco IOS XR software. During normal startup, the ROMMON initializes the cards,
and then control passes to the Cisco IOS XR software. After the Cisco IOS XR software takes over,
ROMMON is no longer in use.
A copy of the ROMMON software exists on each card. If a card fails to boot theCisco IOS XR software,
the ROMMON software takes control and places the card in ROMMON mode. Because a card in
ROMMON mode is not running the Cisco IOS XR software, that card will be unavailable for normal
router operations.
When the Designated Secure Domain Router System Controller (DSDRSC) in an SDR is placed in
ROMMON mode, the router operations are transferred to the standby DSDRSC (if available). If both the
primary and standby DSDRSCs are in ROMMON mode, then the router operations cease since the
Cisco IOS XR software is no longer running.
Ensure you have the correct ROMMON firmware on your system. See the Cisco IOS XR ROM Monitor
Caution
Guide for the Cisco CRS-1 Router for the ROMMON firmware requirements and information on
upgrading and downgrading ROMMON firmware and information on overriding a ROMMON boot
block.
To verify and troubleshoot the ROMMON version on systems running Cisco IOS XR software, perform
the following procedure.
SUMMARY STEPS
1.
2.
3.
4.
Cisco IOS XR Troubleshooting Guide for the Cisco CRS-1 Router
10-210
LC/0/3/CPU0:rommon_burner[65635]: %ROMMON_BURNER-3-FILE_OP_ERR : Opening
ROMMON flash
partition failed: No such file or directory in function main at line 952
If you are upgrading only ROMMONB and the version does not change to the expected version after
the upgrade, the upgrade might have failed. When the router cannot load ROMMONB, it loads
ROMMONA.
If both ROMMANB and ROMMONA are damaged due to an unexpected node reset or a power
interruption during the upgrade, the affected route processors must be returned to Cisco for repair.
show version
show diag | inc ROM|NODE|PLIM
more nvram:/classic-rommon-var
Place the designated shelf controller (DSC) in ROMMON mode:
a. admin
config register 0x0
b.
exit
c.
reload
d.
Chapter 10 Troubleshooting Upgrading and Downgrading Software
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