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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 Procedu res
Step 9 For all primary and stand-alone SMs in all redundancy groups, enter the dsptotals command.
This step is to examine the numb er of shelf connections, lines, ports, and channels after the u pgrade or
downgrade. The values can be compar ed to th o s e b ef o re th e download and, therefore, it can be
established that the configuration has remained the same. Restore ASC and SM configurations if
necessary.
Procedure 25—Graceful Upgrade, 2-Core Card Set
Procedure 25 is used for 4.x to 4.y, 4x to 5.x, and 5.x to 5.y.
Step 1 Check compatibility.
With any downgrade technique, there is a lway s t he issue of compatibility. Any release c an be
downgraded to any othe r release, but in many in stances configuratio n in formation will be l os t .
Hardware incompatibilities can p r event s om e d owng ra de s. F or exa mple, Release 2 and Release 3
service modules require two Flash chips. Release 4 SMs will be shipped with a single Flash chip. A
Release 4 shelf containing BNM-E1 ca rds or serv ice re sour ce modu le 3T3 c ards cann ot be do wn grade d
to Release 2 or Release 3. C heck the compatibility m at ri x to d ete rmine if a particular downg ra de is
supported and how it affects configurat io n lo s s.
Step 2 Save the current ASC configuration. Perform this step for the ASC prior to upgrading the firmware.
First reset the card, then u se T FTP get to save the card’s current configuration in the workstation.
tftp shelf
tftp> bin
tftp> get AXIS_ASC_ACTIVE.BR
Step 3 Save the current service module (SM) co nfiguration for each primary and stand -alone SM. Perform this
step for the SM prior to upgrading the firmware.
First reset the card, then u se T FTP 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 4 Enter the dspadrcxat command. Note the value of th e ConnNumOfValidEntries parameter.
This value indicates the number of connections. This command is run again at the end o f the procedure
to ensure that the number of co nnec tions has not changed.
Step 5 For all primary and stand-alone SMs
a. 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 estab li she d that the configuration has re ma in ed the same.
b. Enter the tftp put <ASC_BT_fi le> AXIS_A SC_B ACKUP.FW command. This step downloads the
new boot code into the ASC.
c. Enter the chkflash command. This command ca lculates and compares the Flash checksum to verify
whether the boot code is correct.