Which three actions are required to implement filter-based forwarding? (Choose three.)

Question

Options

• AYou must create an instance-type forwarding routing instance.
• BYou must create an instance-type vrf routing instance.
• CYou must create a match filter.
• DYou must create a security policy.
• EYou must create a RIB group.

• A
  83% (15)
• B
  6% (1)
• D
  11% (2)

Explanation

Filter-Based Forwarding (FBF) in Junos OS allows traffic to be routed based on specific criteria such as source address, rather than just the destination address. This is useful in scenarios like policy routing or providing multiple paths for different types of traffic. Instance-Type Forwarding: You must create an instance-type forwarding routing instance. This routing instance allows for different routing tables based on the incoming packet filter. set routing-instances FBF-instance instance-type forwarding You need to create a filter to match the traffic that will be forwarded according to your custom routing policy. This filter is applied to an interface to determine which traffic will use the custom forwarding instance. Command Example: set firewall family inet filter FBF-filter term 1 from source-address <address> set firewall family inet filter FBF-filter term 1 then routing-instance FBF-instance RIB Group: A RIB (Routing Information Base) group is necessary to share routes between the primary routing table and the custom routing instance. This allows FBF traffic to use the routing information from other routing tables. Command Example: set routing-options rib-groups FBF-group import-rib inet.0 set routing-instances FBF-instance routing-options rib-group FBF-group

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