1- Is there any possibility that the FWSM module (Firewall Version 4.1(3)) reboots when the counter rollover?
2- Is there any possibility that we lost the access to the FWSM module when the counter rollover?
3- Is there any possibility that the show version command get affected and do not show the good information (Ex: FWSM up 312 days 21 hours) after counter 497 days?
What should we expect and how to protec us if there is an impact.
Do we need to reset the FW before the rollover?
Thanks in advance for your help
1. You found information on the internet indicating that some hardware/firmware combinations will reboot. Now you need to perform due diligence. Either verify that your specific equipment is not affected, or plan to be available during the rollover in case there is an extended outage.
2. If the device reboots, it will be unavailable until it finishes rebooting. Cisco switches typically reboot faster than PCs, so I would expect a minimal outage---if there is one at all.
3. A counter rolling over usually means that it resets to zero. Your uptime metric will change---whether the switch reboots or not. In computers, an integer may rollover to something besides zero, so your uptime may reset to something other than zero.
Since you have about 6 months until it rolls over, see if you can reboot it before then. Then it won't be a problem again for a long time.