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MIB Reference

TE30, TE40, TE50, TE60, TX50, RP100, and RP200 V600R019C00

MIB
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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 Version

SNMP Version

There are three versions of SNMP: SNMPv1, SNMPv2c, and SNMPv3.

SNMPv1 and SNMPv2c rely on community names for authentication. The NMS uses the community name list to control the access to managed nodes. The agent does not check whether the sender uses an authorized community name. SNMP messages are transmitted without encryption. As a result, SNMPv1 and SNMPv2c cannot secure authentication or privacy.

Compared with SNMPv1, SNMPv2c supports:

  • More operations
  • More data types
  • More error codes
  • Multiple transport layer protocols

SNMPv3 provides all functions of SNMPv1 and SNMPv2c and a security mechanism that authenticates and encrypts SNMP packets.

In terms of security, SNMPv3 emphasizes security of data and access control.

SNMPv3 ensures the security for SNMP packets in the following ways:

  • Data integrity check

    The data cannot be modified in an unauthorized manner. Changes to packet sequence are limited to an allowed extent.

  • Data source verification

    SNMPv3 verifies managed node from which packets are sent. SNMPv performs security check based on managed nodes. It authenticates managed nodes that generate packets but not the applications.

  • Data authentication check

    When the NMS or an agent receives a message, it checks the time the message is generated. If the difference between the creation time and the current system time exceeds the specified time range, the message is discarded. This protects data against tempering during transmission and avoids reception or processing of malicious data.

SNMPv3 access control is a means of protocol-based security check. It controls the access to MOs.

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Updated: 2019-05-31

Document ID: EDOC1100057237

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