Technical data

System Administration
303561-A Rev 00
8-39
Upgrading PROMs Remotely
Because the operations involved in upgrading PROMs place an increased load on
the router, there is a greater chance that the PROM upgrade process will time out
or fail during periods of peak traffic on your network.
Follow these guidelines to ensure that the PROM upgrade is successful:
• Store the PROM executable files (for example, frediag.exe or freboot.exe) on a
flash card that resides on the least utilized slot in the system.
• Perform the upgrade during non-peak hours to ensure a minimum traffic load
on the router.
• On multislot systems, upgrade the PROM for each slot separately. Attempting
to upgrade multiple slots at the same time increases the load on the backplane.
Determining Current PROM Image Versions
To decide whether or not you need to upgrade the PROMs in a router, you need to
determine the versions of boot and diagnostics PROM images currently running in
that router.
Caution:
If the PROM upgrade process is interrupted, the router could be
disabled.
Note:
A label on the back panel of some router models indicates the installed
version of boot and diagnostic PROMs.