CHAPTER
2-73
Cisco IOS XR Troubleshooting Guide for the Cisco CRS-1 Router
OL-21483-02
2
Troubleshooting Booting
This chapter describes techniques that you can use to troubleshoot a router running Cisco IOS XR
software. It includes the following sections:
• Booting Tips, page 2-73
• Verifying Successful Bootup, page 2-74
• Verifying and Troubleshooting the Console Connection, page 2-74
• Verifying and Troubleshooting Route Processor and Shelf Controller Cards, page 2-75
Booting Tips
The following booting sequence should be followed. See Cisco IOS XR Getting Started Guide for the
Cisco CRS-1 Router for detailed information on the booting sequence for routers running Cisco
IOS XR
software.
1. Connect to the console port.
2. Boot the route processor (RP) of the designated shelf controller (DSC).
For Cisco CRS-1 Multishelf Systems, when the RP of the DSC boots up, if the RP or shelf controller
(SC) on other chassis are configured to autoboot (for example, they are in a loop sending minimum
boot image [MBI] requests), they boot automatically. If they have not been configured to autoboot,
enter reset at the ROM Monitor (ROMMON) prompt.
3. Verify that the value of the configuration register (confreg) is 0x102. Enter confreg at the
ROMMON prompt to display the configuration register value. If the configuration register value is
not set to 0x102, see Cisco
IOS XR Getting Started Guide for the Cisco CRS-1 Router for
information on changing the configuration register value.
4. It takes approximately 20 minutes for the cards on all chassis to be displayed in the Cisco IOS XR
software show commands. Managed nodes (service processor [SP], line card [LC], and distributed
route processor [DRP]) are booted by shelfmgr, mbimgr, and instdir automatically when ROMMON
is set to autoboot.
Use the following chassis numbering guidelines when numbering the chassis in a
Cisco
CRS-1 Multishelf System:
Note It is recommended that the line card chassis containing the active DSC be numbered 0, the second line card
chassis be numbered 1, and the fabric card chassis be numbered F0. See Cisco
IOS XR Getting Started
Guide for the Cisco CRS-1 Router for more information on recommended chassis numbering.
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