Relationship between the actual setup and holding priorities of CR-LSP tunnels and the priority values

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CR-LSP tunnels use the setup priority and holding priority to determine whether to preempt resources. The priority value ranges from 0 to 7. A smaller value allows for a higher priority. The setup priority must be lower than or equal to the holding priority for a tunnel.
The priority and the preemption attributes are used together to determine resource preemption among tunnels. If multiple CR-LSP tunnels are to be established, CR-LSP tunnels with higher priorities can be established by preempting resources. When the bandwidth is insufficient, resources of an established LSP tunnel with a lower holding priority may be preempted by an LSP tunnel with a higher setup priority.

Other related questions:
Relationships between routing protocol values and priorities on the USG6000 series
In routing protocols, 0 indicates the direct route, and 255 indicates any route learned from unreliable sources. A smaller value indicates a higher priority.

Relationships between routing protocol values and priorities on the USG2000 and USG5000 series
In routing protocols, 0 indicates the direct route, and 255 indicates any route learned from unreliable sources. A smaller value indicates a higher priority.

What is the difference between the static LSP bound to the tunnel and the static CR-LSP
Switches of V200R002C00 or later support the static CR-LSP. A static LSP is classified into the common LSP and static LSP bound to the tunnel. A static CR-LSP must be bound to the tunnel. A static CR-LSP requires bandwidth while a common static LSP does not require.

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.

How to configure mapping between DSCP priorities and local priorities on S series switches
You can run the following commands to configure mapping between DSCP priorities and local priorities on S series switches (except the S1700): - ip-dscp-inbound dscp-value phb service-class [ green | yellow | red ]: configures mapping between DSCP priorities and local priorities for IP packets on the inbound interface. - ip-dscp-outbound service-class { green | yellow | red } map dscp-value: configures between DSCP priorities and local priorities for IP packets on the outbound interface.

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