C-26
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
c. Enter the chkflash command. This command ca lculates and compares the Flash checksum to verify
whether the boot code is correct.
d. Enter the resetcd <standby_ASC> command. This command resets the standby card.
e. Enter the resetcd <active_ASC> command. This com ma nd resets the active card.
Step 7 For all SMs
a. Enter the resetcd command. This command resets the card.
b. Enter the dspadrxlat command to ensure that the number of connections is correct.
Step 8 For all 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 upgr ad e o r downgr ad e. Th e
values can be compared to those b ef or e t h e d ownlo ad a nd, therefore, it can be esta bl ish e d th at th e
configuration has remained the same. Restore the ASC and SM configurations if necessary.
Procedure 16—Graceful Downgrade, 2-Co re Card Set
Procedure 16 is use d f o r 1. 2.x to 2.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 ost .
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 ma t 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 configur at io n . Enter this step for the A S C pr i or to upgrading the firmwa re .
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.