Vanguard Managed Solutions 6455 User Manual

3-34 

Installation and Replacement

Method 2
This is the cleanest way to accomplish the upgrade to an 8MEG flash SIMM and is 
the preferred method.

This can be done, but because you cannot mix bootproms and releases with the 
presence of an 8MEG flash SIMM (please refer to the “Rules and Upgrade/
Downgrade procedures and considerations” section on page 3-33) you must:

Power down the node and install the 8MEG flash SIMM. Power up 
the node. The node will come up, both flash banks will show "0" 
bytes and the CMEM will be cleared.

Use Vanguide only to download 6.2 image.

Download your saved CMEM.

Save CMEM. 

(Testing has shown that the CMEM will be not be affected using this 
procedure, however it is always recommended that you save CMEM 
before any maintenance operation)

The 6455 is starting with 5.1 bootprom, 6.1 image and 4MEG flash.

Install the 8MEG flash SIMM. Power up the node and copy or load a 
6.1 image into the new flash bank.

Use Vanguide to upgrade the node to 6.2, this will also upgrade the 
bootprom.

Insure that the node was accessible via CTP so that Vanguide can detect 
the bootprom version.

Completed! The node will be upgraded to 6.2 (both image and 
bootprom) with the CMEM intact. 

Save CMEM, then power down and remove the 8MEG SIMM.

Manually downgrade the bootprom to 5.1 (or earlier). Use the zap 
command and force coldload and send down the single file, example:

"cougar_bootprom_cldr.xrc"

Coldload  a 6.1 image.

If desired, you may reinstall the 8MEG flash SIMM and use normally.