Relationships between routing protocol values and priorities on the USG2000 and USG5000 series

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In routing protocols, 0 indicates the direct route, and 255 indicates any route learned from unreliable sources. A smaller value indicates a higher 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.

Modifying the routing protocol priority on the firewall
The method for modifying the routing protocol priority on the USG2000&5000&6000 is as follows: -Modifying the static routing protocol priority: [USG]ip route-static 192.168.0.0 16 10.1.1.1 preference 20 -Modifying the RIP priority: [USG]rip [USG-rip-1]preference 80 -Modifying the OSPF priority: [USG]ospf [USG-ospf-1]preference 30 -Modifying the IS-IS priority: [USG]isis [USG-isis-1]preference 90 -Modifying the BGP priority: [USG]bgp 25212 [USG-bgp]ipv4-family unicast [USG-bgp-af-ipv4]preference 120

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.

Routing protocol types based on the used algorithm on the USG2000 and USG5000 series
Based on the type of algorithm they use, dynamic routing protocols are classified into the following types: Distance-vector routing protocol: includes RIP and BGP. BGP is also called path-vector protocol. Link-state routing protocol: includes OSPF and IS-IS.

Routing protocol types based on the application range on the USG2000 and USG5000 series
Based on the application range, routing protocols are classified into the following types: Interior Gateway Protocol (IGP): runs inside an AS, such as RIP, OSPF, and IS-IS. Exterior Gateway Protocol (EGP): runs between different ASs, such as BGP.

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