I downgraded from ROS 4.5 to 4.0, and after the downgrade the 450G was not reachable even by ping. I used Winbox to login via MAC address and found that ether1 was disabled along with its corresponding IP and its entry in my bridge table was removed. I simply added those settings back in, but now the OID values for anything associated with ether1 have changed their last number from 1 to 8. For example, the ifName would normally be 1.3.6.1.2.1.31.1.1.1.1.1, but is now 1.3.6.1.2.1.31.1.1.1.1.8, and the ifHCInOctets would normally be 1.3.6.1.2.1.31.1.1.1.6.1, but is now 1.3.6.1.2.1.31.1.1.1.6.8.
Something seemed to have corrupted ether1 in the downgrade process. The OID 1.3.6.1.2.1.31.1.1.1.1.1 is a standard value to address the ifName for the first ethernet port. I have other routers that also share that same value. I have no idea why my 450G decided to change it. I was running this same config on a RB150 before and it shared that same OID to identify ether1’s ifName and ifHCInOctets.
I have configs elsewhere that depend on certain OID values and they are now broken because my 450G decided to change them after ROS was reinstalled. I have tried downgrading and upgrading to different versions, but it hasn’t helped.
Anyone ever have any similar problems or have a solution to rebuild the SNMP MIB to default values? I’m guessing this is probably a mystery to most of you as it seems like it is a corrupt MIB caused by a bad ROS install. I think I just want to wipe the 450G’s NAND, and install from scratch, but is this even possible with a RB?