C-46
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
Description of Upgrade/Downgrade Term inology
dspadrxlat
Any upgrade that involve s rese t ting t he acti v e ASC c ard and an y do wngr ad e in whic h th e configuration
is preserved should compare the num ber of shelf connections before and after t he upgrade/downgrade.
This is accomplished by entering the MGX 8220 ASC CLI command.
shelf.1.<3|4>.ASC.a > dspadrxlat
The most important infor mat io n is
ConnNumOfValidEntries: <value>
You should not make configuration changes to the shelf whi le an upgrade or downgrade is in progres s .
There is a chance that all or part of t he co n fig urat io n ch an ge s co uld be lo s t .
dsptotals
Any upgrade that involves resetting a stand -al one or primary service module sh ou ld co mp ar e t he total
number of lines, ports and chan ne ls before and after the upgrade/d ow ng rad e. This is accomplished by
entering the MGX 8220 SM CLI command.
shelf.1.<slot>.<type>.a > dsptot als
The most important infor mat io n is
total active lines = <value>/< max im u m l in es >
total active ports = <value>/<m a xi m u m p or ts>
total active chans = <value>/< m ax im umchannels>
You should not make configuration changes to the shelf whi le an upgrade or downgrade is in progres s .
There is a chance that all or part of t he co n fig urat io n ch an ge s co uld be lo s t .
donotupdatestandby
The MGX 8220 active ASC CLI command, donotupdatestandby, is used as part of an ASC graceful
firmware upgrade to prevent the active ASC c ard from downloading firmware or co nfigu r ati o n
information to a reset standby ASC card. Some ASC firmware releases include the MGX 8220 active
ASC CLI command, updatestandby, which can be used to und o the effects of the donotupdatestandby
command.
shelf.1.<3|4>.ASC.a > donotupdatestandby
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 configuration infor m at io n will be lost.
Hardware incompatibilities can p r event som e downgrades. For example, Releases 2 a nd 3 se rvice
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 e le as e 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 determine if a particul ar d own grad e is
supported and how it affects configurat io n lo s s.