Cisco Systems MGX 8220 Procedure 14Graceful Downgrade, 1-Co re Ca rd Set (SM only)

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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 Procedu r es Graceful Upgrade and Downgrade Procedures
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 checksum to verify
whether the boot code is correct.
Step 7 For all SMs, enter the resetcd command. This command resets the card.
Step 8 For all SMs, enter the dsptotals command.
Use this step to examine the num ber of shelf connections, lin es , po r ts, a nd c ha nnels after the upgrade
or downgrade. The values can be comp ar ed t o th ose before the download and, ther ef ore, it can be
established that the configuration has remained the same.
Procedure 14—Graceful Downgrade, 1-Co re Ca rd Set (SM only)
Procedure 14 is use d fo r 1.2.y to 2.x.
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 M a tr i x t o de termine if a particular d own g 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 C o nn N u m OfValidEntries p a ra m e te r.
This value indicates the number of connec tion. This command is run again at the end of th e procedure
to ensure that the number of co nnec tions has not changed.
Step 5 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 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, there fo re,
it can be established that the co nfiguration has remained the s a m e.