i have asa firewall that need to be monitored but when i try to discover using snmp string,i say unreachable.is it because i need to upgrade my CM OR RME package.i upgraded CS device package.i check with network guys and i is not blocking ping from LMS server.at least it should discover,right?thanks for your reply in advance.
You need to pick a starting OID, or expect to wait a _long_ time. It's best to test something simple like sysObjectID as a starting OID. Yes, you can use SNMP Walk on devices that are reported as unreachable, but you will need to use correct SNMP credentials before the SNMP Walk utility will work. So, if you know the credentials are correct when using SNMP Walk, but it reports that the walk timed out, then there is something blocking the SNMP traffic, or your credentials or device configuration is still wrong.