How do I differentiate USB0 and USB1

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In V200R001C00, the first installed USB port is USB0 and the second installed USB port is USB1.
From V200R001C01, facing the panel where USB ports are installed, on the AR1200 series, the left USB port is USB1 and the right USB port is USB0; on the other AR series routers, the left USB port is USB0 and the right USB port is USB1.

Other related questions:
How is bandwidth of different types of traffic guaranteed
Configure traffic classifiers to differentiate traffic, configure queue ef or queue af in traffic behaviors, bind the traffic classifiers and traffic behaviors to a traffic policy, and apply the traffic policy to an interface.

Differences between FusionAccess licenses and concurrent licenses
FusionAccess licenses are assigned based on the maximum number of available user accounts while concurrent licenses are assigned based on the maximum number of users who can connect to a terminal concurrently. The two types of licenses have different dimensions and application scenarios. Generally, FusionAccess licenses apply to scenarios where a user has one or several virtual desktops that are frequently used, such as OA office. Concurrent licenses apply to scenarios where a user has one virtual desktop or several users share one VM or VM resource pool that is infrequently used, such as meeting terminals, call centers, and multimedia classrooms.

Concepts of configuring active and standby firewalls
On a load balancing network, to enable both devices to work in master state, consider the following issues: How to back up information between the devices? Which commands need to be backed up? Which is the backup direction? To avoid errors during the backup, the USG introduces the concept of designated active and standby devices. The firewall that sends backup configurations is called the designated active device (whose system name starts with "HRP_M"), and the firewall that receives backup configurations is called the designated standby device (whose system name starts with "HRP_S"). A firewall must meet the following requirements to become the designated active device: In the VRRP group, only the firewalls in master state have the chance to be the designated master device. In load balancing mode, the two hot standby USGs are both master devices. In this case, the designated master device is selected according to the priorities of the VRRP groups and the descending order of the real IP addresses of the heartbeat interfaces. The switchover between designated active and standby devices is not implemented unless a fault occurs on the designated active device or the designated active device quits the VRRP group for the stability of the designated active device.

Can S series switches enabled with SNMP support specifying different source ports based on trap types
For S series switches (except S1700), the snmp-agent trap source command can be executed to specify the source port type and number for sending SNMP traps sent from one server. The system specifies the IP address of the port as the source IP address of traps. However, different port numbers cannot be specified to different types of traps.

Mapping between differentiated services code point (DSCP) and local priority
IP packets carry the DSCP field to indicate the QoS preference. The mapping between the priority fields must be configured on the gateway to retain packet priorities when the packets traverse different networks. You can run the display qos map-table command to view the mapping between priorities, or run the input command in the priority mapping table view to configure the mapping between priorities.

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