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CX11x, CX31x, CX710 (Earlier Than V6.03), and CX91x Series Switch Modules V100R001C10 Configuration Guide 12

The documents describe the configuration of various services supported by the CX11x&CX31x&CX91x series switch modules The description covers configuration examples and function configurations.
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Configuration Task Summary

Configuration Task Summary

This section compares SNMP versions in terms of their support for features and usage scenarios to provide a reference for your SNMP version selection during network deployment.

The device supports SNMPv1, SNMPv2c, and SNMPv3. Table 14-2 lists the features supported by SNMP, and Table 14-3 shows the support of different SNMP versions for the features. Table 14-4 describes the usage scenarios of SNMP versions, which helps you choose a proper version for the communication between an NMS and managed devices based on the network operation conditions.

NOTE:

When multiple NMSs using different SNMP versions manage the same device in a network SNMPv1, SNMPv2c, and SNMPv3 are configured on the device for its communication with all the NMSs.

Table 14-2 Description of features supported by SNMP

Feature

Description

Access control

This function is used to restrict a user's device administration rights. It gives specific users the rights to manage specified objects on devices and therefore provides fine management.

Authentication and privacy

The authentication and privacy packets are transmitted between the NMS and managed devices. This prevents data packets from being intercepted or modified, improving data sending security.

Error code

Error codes help the administrator to identify and rectify faults. It is easy for the administrator to manage the device if the error codes are more with variety.

Trap

Traps are sent from managed devices to the NMS. Traps help administrator to know device faults.

The managed devices do not require the acknowledgement from the NMS after sending traps.

Inform

Informs are sent from managed devices to the NMS.

The managed devices require the acknowledgement from the NMS after sending informs. If a managed device does not receive an acknowledgement after sending an inform.

GetBulk

GetBulk allows an administrator to perform Get-Next operations in batches. In a large network, GetBulk reduces the workload of administrator and improves management efficiency.

NOTE:

After the restart, the NMS can receive the informs that are sent during the restart.

Table 14-3 Different SNMP versions support for the features

Feature

SNMPv1

SNMPv2c

SNMPv3

Access control

Access control based on the community name and MIB view

Access control based on the community name and MIB view

Access control based on the user, user group, and MIB view

Authentication and privacy

Authentication based on the community name

Authentication based on the community name

Supported authentication and privacy modes are as follows:

Authentication mode:
  • MD5

  • SHA

Encryption mode:
  • 3DES168
  • AES128
  • AES192
  • AES256
  • DES56

Error code

6 error codes supported

16 error codes supported

16 error codes supported

Trap

Supported

Supported

Supported

Inform

Not supported

Supported

Supported

GetBulk

Not supported

Supported

Supported

Table 14-4 Usage scenarios of different SNMP versions

Version

Usage Scenario

SNMPv1

This version is applicable to small-scale networks whose networking is simple and security requirements are low or whose security and stability are good, such as campus networks and small enterprise networks.

SNMPv2c

This version is applicable to medium and large-scale networks whose security requirements are not strict or whose security is good (for example, VPNs) but whose services are so busy that traffic congestion may occur.

Use inform to ensure the messages sent from managed devices are received by the NMS.

SNMPv3

This version is applicable to networks of various scales, especially the networks that have strict requirements on security and can be managed only by authorized administrators. For example, data between the NMS and managed device needs to be transmitted over a public network.

If you plan to build a network, choose an SNMP version based on your usage scenario. If you plan to expand or upgrade an existing network, choose an SNMP version to match the SNMP version running on the NMS to ensure the communication between managed devices and the NMS.

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Updated: 2019-08-09

Document ID: EDOC1000041694

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