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1 – Scope of the document
This document is aimed at notifying customers for the field use case of: Replacing a cBR-8 Supervisor Card with a replacement Supervisor. If the cBR-8 chassis is running 17.9.1* software and the replacement Supervisor has a “Pre-17.9.1*” version of software.
2 – Objective
It is recommended that any/all spare cBR-8 Supervisors be upgraded to 17.9.1* prior to being inserted into a production chassis.
3 – Legacy upgrade requirements
1. Prepare USB(s) with cBR8 IOS-XE 17.6.1w and 17.9.1w images.
v17.6.1w = cbrsup-universalk9.17.06.01w.SPA.bin
v17.9.1w = cbrsup-universalk9.17.09.01w.SPA.bin
2. Remove the SUP that needs to be replaced.
3. While connected to a console attached to the stby-SUP PIC, insert the new stby-SUP.
Note: Interrupt the booting process of the new stby-SUP in the next step to force it to the ROMMON prompt.
4. While the new stby-SUP is booting the image, break to ROMMON by issuing the break command from the console. The break must be issued early in the boot process, while the image is copying to RAM.
5. From ROMMON, change the configuration register boot option:
◦ Type 'confreg' and follow the instructions. Be sure to only change the boot option to boot to ROMMON, while keeping the rest of the configuration register settings the same.
◦ Example:
rommon 1 > confreg
Configuration Summary
(Virtual Configuration Register: 0x1822)
enabled are:
[ 0 ] break/abort has effect
[ 1 ] console baud: 115200
boot: ...... image specified by the boot system commands or default to: cisco2-Cisco cBR-8
do you wish to change the configuration? y/n [n]: y
enable "diagnostic mode"? y/n [n]: n
enable "use net in IP bcast address"? y/n [n]: n
enable "load rom after netboot fails"? y/n [n]: n
enable "use all zero broadcast"? y/n [n]: n
disable "break/abort has effect"? y/n [n]: n
enable "ignore system config info"? y/n [n]: n
change console baud rate? y/n [n]: n
change the boot characteristics? y/n [n]: y
enter to boot:
0 = ROM Monitor
1 = the boot helper image
2-15 = boot system
[2]: 0
Configuration Summary
(Virtual Configuration Register: 0x1820)
enabled are:
[ 0 ] break/abort has effect
[ 1 ] console baud: 115200
boot: ...... the ROM Monitor
do you wish to change the configuration? y/n [n]: n
rommon 2 >
◦ Reset the new stby-SUP for the new config register settings to take effect:
rommon 2 > reset
6. After reload, check the ROMMON version from the new stby-SUP console log:
◦ Type the following to check the ROMMON version:
rommon 1 > showmon
Current image running (0/1): Boot ROM1
System Bootstrap, Version 16.7(6r)S, RELEASE SOFTWARE
Copyright (c) 1994-2021 by cisco Systems, Inc.
Viper version register: 0x170724e0
7. If the ROMMON version from step 6 is already 16.7(8r)s or later, it does not need to be upgraded - skip to step 8. If the ROMMON version is earlier than 16.7(8r)s, proceed with this step to upgrade ROMMON. Here, use the 17.6.1w image from the USB to upgrade the ROMMON version to 16.7(8r)s:
◦ Issue following instruction to use 17.6.1w to upgrade ROMMON from USB:
rommon 1 > boot usb0:cbrsup-universalk9.17.06.01w.SPA.bin
◦ The new stby-SUP will reload twice, installing the updated ROMMON version.
uefi_launch_linux: Launching the kernel....
Initializing Hardware ...
System Bootstrap, Version 16.7(6r)S, RELEASE SOFTWARE
Copyright (c) 1994-2019 by cisco Systems, Inc.
Current image running: Boot ROM0
Rommon upgrade requested
Start Flash boot timer
Initializing Hardware ...
System Bootstrap, Version 16.7(8r)S, RELEASE SOFTWARE
Copyright (c) 1994-2021 by cisco Systems, Inc.
Current image running: *Upgrade in progress* Boot ROM1
ROM: stopping boot timer
Last reset cause: BootRomUpgrade
Viper version register: 0x170724e0
Set Chassis Type to 13RU
Cisco cBR-8 platform with 50331648 Kbytes of main memory
◦ Validate the new ROMMON image using the following command:
rommon 1 > showmon
Current image running (0/1): Boot ROM1
System Bootstrap, Version 16.7(8r)S, RELEASE SOFTWARE
Copyright (c) 1994-2021 by cisco Systems, Inc.
Viper version register: 0x170724e0
8. If the ROMMON version from previous steps is 16.7(8r)s or later you can load the 17.9.1w image directly from USB.
◦ To load 17.9.1w from USB, use the following command at the ROMMON prompt:
rommon 2 > boot usb0:cbrsup-universalk9.17.09.01w.SPA.bin
9. On the active-SUP, use 'show redundancy', verify that the stby-SUP boots with the 17.9.1w image. NOTE that the value of the Configuration register of the stby-SUP includes the notation that the Configuration register "(will be 0x1822 at the next reload)".
10. Copy the image to the boot location of the new stby-SUP.
◦ First, verify the boot location using 'show startup-config | in boot'
◦ Example:
Router#show start | in boot
boot-start-marker
boot system harddisk:cbrsup-universalk9.17.09.01w.SPA.bin
boot-end-marker
◦ Note that the boot location in the example above is harddisk:.
◦ Copy the image from the usb to the boot location identified above.
◦ Example:
Router-stby#copy usb0:cbrsup-universalk9.17.09.01w.SPA.bin harddisk:
◦ NOTE that when consoled into the stby-SUP, the stby-SUP’s harddisk: appears as “harddisk:” (it does not appear as “stby-harddisk:”)