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

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.

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