Why does the NMS tool display an error message when it attempts to load some MIB files for S series switches

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For S series switches (except the S1700), when the NMS tool is used to load some MIB files, error message "cannot load this MIB, error: ParseError,no content found, except 'DEFINITIONS::=BEGIN';line:1)" or "cannot load this MIB, error: MIB Parsing failed" is displayed.
The reason is that some MIB files, such as RFC1155-SMI, RFC-1212, and SNMPv2-CONF, only define syntax and do not contain MIB objects. These MIB files are referenced by other MIB files.
For example, RFC-1212 defines how MIB files are written, and RFC-1215 defines the syntax of TRAP-TYPE macro.
Ignore these messages when you are loading these MIB files.

Other related questions:
Why does the NMS display an error message when it uses SNMPv2c to connect to an S series switch
When an NMS uses SNMPv2c to connect to an S series switch (except the S1700), error message "another nms was polling the switch with wrong community" is displayed. The reason is that the community name configured on the NMS is different from that configured on the switch. Run the display snmp-agent community command on the switch to check the configured community name.

Why cannot the OSPF MIB configuration on an S series switch be displayed in a MIB browser
Question: After MIB parameters are configured on a MIB browser and a device, the device fails to connect to the MIB browser and the OSPF MIB configuration cannot be displayed in the browser. What should I do? Answer: Perform the following operations on the S series switch to solve the problem. Check whether the connection between the Ethernet interface on the switch and the device where the MIB browser is installed is proper. Check whether IP address conflict occurs on the network. If the network is busy, set the interval at which packets are retransmitted to the MIB browser and the retransmission time to smaller values. Check whether the ospf mib-binding command is executed in the OSPF instance. Check whether the IP address specified by trap in the snmp-agent target-host trap command is the same as the interface IP address of the MIB browser. For example, check whether configurations of the following commands are correct. If the configurations are correct and the device where the MIB browser is installed is properly connected to the Ethernet interface on the switch, the browser can correctly display the MIB information. [HUAWEI] ospf mib-binding process-id [HUAWEI] snmp-agent sys-info version all [HUAWEI] snmp-agent community read public_huawei [HUAWEI] snmp-agent community write private_huawei

Cause why a message is displayed indicating that a board is occupied by a cable in an attempt to delete an NE unreachable by the NMS
The correct operations are as follows: Delete the cables on the NE and then delete the NE.

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