After upgrading the IOS on a c3825, I found the index of the snmp parameters for FXO changed. This is inconsistent with my knowledge, in that i thought those parameters would never change for a router.
What am i missing?
You can try "snmp-server ifindex persist".This should keep the snmp indexd same.
we had the same issue some years ago:
even if we had configured
snmp mib ifindex persist
after a major change release the SNMP indexes were changed.
Cisco answer was that when the command is there to ensure that after a reload the indexes are consistent but when changing IOS this is not guaranteed in case of upgrade
Hope to help