In the following example, the NMS is polling the managed device to get a number of bytes sent out on interfaces. The MIB OID for byte count is .1.3.6.1.2.1.2.2.1.16, which is ifOutOctets. The managed device in discussion has two interfaces, mapped to OID .1.3.6.1.2.1.2.2.1.16.1 and .1.3.6.1.2.1.2.2.1.16.2. When NMS polls the device to check the statistics for the third interface (which is not present), it returns a noSuchInstance error.