No relevant resource is found in the selected language.

This site uses cookies. By continuing to browse the site you are agreeing to our use of cookies. Read our privacy policy>Search


To have a better experience, please upgrade your IE browser.


MIB Reference

AR100-S, AR110-S, AR120-S, AR150-S, AR160-S, AR200-S, AR1200-S, AR2200-S, and AR3200-S V200R009

Rate and give feedback:
Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document. Note: Even the most advanced machine translation cannot match the quality of professional translators. Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).
SNMP Packet Operation Process

SNMP Packet Operation Process

The agent on the managed node receives a request packet from the NMS through UDP port 161.

The agent treats the received packet as follows:

  1. Decoding the packet based on basic encoding rules of Abstract Syntax Notation One (ASN.1) and representing it in an internal data structure

    The agent discards the packet if some errors cause the decoding failure.

  2. Checking the SNMP version number contained in the packet

    The agent fetches the version number from the packet and compares it with the version that it supports. If they are inconsistent, the agent discards the packet.

  3. Checking the community name contained in the packet

    The community name is inserted by the NMS. If the community name is not the supported one, the agent discards the packet. A trap packet is returned to the NMS at the same time. SNMPv1 provides weak security measures, which are enhanced in SNMPv3.

  4. Fetching the PDU from the authenticated ASN.1 object

    If the operation fails, the agent discards the packet.

  5. Handling the PDU. The agent handles the PDU according to its type. It searches the MIB to find the MO matching the variable, and then obtains the value of the variable from the module. After that, the agent generates the response packet, encodes it and returns it to the NMS.

  6. The NMS performs the same operations as the agent, and displays the final result.

Updated: 2019-07-19

Document ID: EDOC1000174090

Views: 450261

Downloads: 46

Average rating:
This Document Applies to these Products
Related Documents
Related Version
Previous Next