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C-22
Cisco MGX 8220 Installation and Configuration
Release 5.0, Part Number 78-6430-03 Rev. D0, November 2003
Appendix C Firmware Upgrade and Downgrade Procedures
Graceful Upgrade and Downgrade Procedures
A CWM workstation attached to a BPX is one method in which MGX 8220 commands and TFTP
commands can be run on the MGS 8220 using an inband channel. The workstation can also be attached
to the MGX 8220 through an Ethernet LAN, or through a TCP/IP connection on the control port on the
ASC.
Procedure 13—Graceful Upgrade, 1-Core Card Set (SM only)
Procedure 13 is used for 1.2.x to 2.y.
Step 1 Save the current ASC configuration. Perform this step for the ASC prior to upgrading the firmware.
First reset the card, then use TFTP get to save the card’s current configuration in the workstation.
tftp shelf
tftp> bin
tftp> get AXIS_ASC_ACTIVE.BR
Step 2 Save the current service module (SM) configuration for each primary and stand-alone SM. Perform this
step for the SM prior to upgrading the firmware.
First reset the card, then use TFTP get to save the card’s current configuration in the workstation.
tftp shelf
tftp> bin
tftp> get AXIS_SM_1_<slot>.PRI.<service password>
Step 3 Enter the dspadrcxat command. Note the value of the ConnNumOfValidEntries parameter.
This value indicates the number of connection. This command is run again at the end of the procedure
to ensure that the number of connections has not changed.
Step 4 For all SMs, enter the dsptotals command.
The configuration of the shelf should not be changed during the downgrade process. Use this step to
examine the number of lines, ports, and channels before the upgrade or downgrade. A similar step can
be made to examine the same configuration parameters after the upgrade or downgrade and, therefore,
it can be established that the configuration has remained the same.
Step 5 For all SMs
a. Enter the flashStartAddr and flashEndAddr commands to start the Flash memory file at
0xbfc00000 and end it at 0xbfc40000.
shelf.1.<slot>.<type><a|s>flashStartAddr = 0xbfc00000
shelf.1.<slot>.<type>.<a|s>flashEndAddr = 0xbfc40000
b. Enter the tftp put <SM_BT_file> AXIS_SM_1_$slot.FW command.
c. Enter the chkflash command. This command calculates and compares the Flash checksum to verify
whether the boot code is correct.
d. Enter the version command. This command displays the version of the boot code currently stored
in Flash memory. This step downloads new firmware into the ASC.
Step 6 For all SMs
a. Enter the flashStartAddr and flashEndAddr commands to start the Flash memory file at
Oxbfc40000 and end it at 0xbfd00000
shelf.1.<slot>.<type><a|s>flashStartAddr = 0xbfc40000
shelf.1.<slot>.<type>.<a|s>flashEndAddr = 0xbfd00000