C-5
Cisco MGX 8220 Installation and Configuration
Release 5.0, Part Number 78-6430-03 Rev. D0, November 2003
Appendix C Firmware Upgrade and Downgrade Procedu r es Standard Upgrade and Downgrade Procedures
d. Enter the version command. This command displays the version of the boot code currently stored
in Flash memory. This ste p dow nloads new firmware int o th e ASC.
Step 6 For all SMs, set the start and en d ad dresses in Flash memory wher e the firmware file will be written.
a. Enter the flashStartAddr and flashEndAddr commands to start the Flash memory file at
Oxbfc00000 and end it at 0xbfd00000
shelf.1.<slot>.<type><a|s>flashStartAddr = 0xbfc40000
shelf.1.<slot>.<type>.<a|s>flashEndAddr = 0xbfd40000
b. Enter the tftp put <SM_FW_file> AXIS_SM_1_$slot.FW command.
c. Enter the chkflash command. This command ca lculates and compares the Flash ch ecksum to verify
whether the boot code is correct.
d. Enter the resetsys command. This comm an d res ets all cards on the shelf.
e. Enter the dspadrxlat command to ensure that the number of connections has not changed during
the procedure.
Step 7 For all primary and stand-alone SMs, enter the dsptotals command.
Use this step to examine the number of lines, p or t s, an d ch an n els af t er the up gra de or downgrade. The
values can be compared to those before the download and, therefore it can be established that the
configuration has remained the same.
Procedure 2—Standard Downgrade, 1-Cor e Card Set
Procedure 2 is used for 1.2.y to 2.x, 2.3.y to 2.x, and 3.3.y to 3.x.
Step 1 Check compatibility.
With any downgrade technique, there is a lway s t he issue of compatibility. Any release c an b e
downgraded to any othe r release, but in many in s tan c e s c o n fig ur a t io n information will b e l ost.
Hardware incompatibilities can p r event som e downgrades. For example, Releases 2 and 3 service
modules require two Flash chip s. Re lease 4 SMs will be shipped with a sin gl e F las h ch ip . A R ele ase 4
shelf containing BNM-E1 cards or service resource module 3T3 cards cannot be downgraded to
Release 2 or Release 3. Chec k the compatibility matrix t o de termine if a particular down gr ad e is
supported, and how it could affect configuration loss.
Step 2 Enter the dspadrxlat command. Note the value of the ConnNumOfValidEntries parameter.
This value indicates the number of connections. This command is run again at the end of the procedure
to ensure that the number of co nnec tions has not changed.
Step 3 For all primary and stand-alone 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 cha nn el s befo r e th e up g ra de or dow ngr ad e. A sim i lar step can
be made to examine the same configuration par ame ters after the upgrade or downgrade and, therefo r e,
it can be established that the co nfiguration has remained the sa m e.
Step 4 Enter the tftp put <ASC_BT_file> AXIS_ASC_BACKUP.FW command. This step downloads the new
boot code into the ASC.
Step 5 Enter the chkflash command. This command ca lcu la tes and compares the Flash check s um to ver i fy
whether the boot code is correct.