Impacts caused by inconsistent USG firewall version and license version

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On the USG2000, USG5000, and USG6000, if the firewall version and license version are inconsistent, the license file cannot be successfully activated.
The handling method is as follows:
1. Upgrade the firewall version and ensure that the firewall version is consistent with the license version (generally, the license version is later than the firewall version, and you only need to upgrade the firewall version).
2. Seek help from the license management center. Send the device ESN, LAC, contract No. and symptom description to license@huawei.com.

Other related questions:
Is the U1900 license of a later version applicable to the device of an earlier version?
The device of an earlier version is not compatible with the U1900 license of a later version. When the device of an earlier version is upgraded to the later version, no license upgrade is required.

Impacts caused by license file content tamper
Impacts caused by license file content tamper are as follows: The license has a validity check mechanism. Any content tamper of the license file results in the invalid license. In this situation, the license file cannot be activated.

USG device select SNMP version protocol
USG select the SNMP protocol version as follows: Run the command snmp-agent sys-info version {v1 | v2c} to enable SNMPv1 or SNMPv2c. By default, SNMPv3 is enabled. The SNMP version of NGFW must be consistent with the SNMP version set in the network management software. When SNMPv1 is enabled, the NGFW will support SNMPv1 and SNMPv3 at the same time. SNMPv1 and SNMPv3 can be used to monitor and manage the NGFW. When SNMPv2c is enabled, since SNMPv3 is enabled by default, NGFW will support both SNMPv2c and SNMPv3, and can monitor and manage NGFW at the same time using SNMPv2c and SNMPv3. Execute snmp-agent sys-info version all, and NGFW will support all SNMP versions simultaneously to monitor and manage NGFW at the same time using SNMP1, SNMPv2c and SNMPv3.

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