Firmware update and certificate

[MrBeginner]

hi ,

I would like ask about iOS upgrade.I would like to upgrade my iOS of router .Let me know after flashed the firmware my config and old certificate will be gone?
Do I need to create new public and need to install new certificate again.I am using this certificate for ipsec.Let me know any impact?

[Rob Ingram · Accepted solution]

Hi
A firmware update of a router should not remove the certificate, however erasing the configuration would. If you are concerned however, you could just export the certificate to back it up and then re-import it if required. That would save having to request a new certificate.
HTH

[MrBeginner]

Hi,

Let me know what is different between below upgrade process ?

copy file usb to flash

boot-start-marker
boot system bootflash:xxx.bin
boot-end-marker
no ip bootp server

exit

boot system flash bootflash:xxx.bin
config-reg 0x2102
exit

[Jason Kunst]

Post question in routing group?