Be able to read a Junos routing table and configuration and explain why a static, aggregate, or filter-based forwarding route is or is not active. The key is verifying next-hop resolution and, for aggregates, the presence of contributing routes before expecting installation.
Start practicing
Protocol Independent Routing — choose a session length
Free · No account required
Domain overview
This domain covers Junos routing that is not tied to a single dynamic protocol: static and aggregate routes, filter-based forwarding, routing instances, and route validity conditions. Questions present configuration or show-route scenarios and ask why a route is inactive or traffic is misrouted.
Exam objectives
Static route activation using qualified-next-hop, preference, and resolve/retain options
Aggregate and generated route behavior, including contributing routes and discard next-hops
Filter-based forwarding with firewall filters and virtual-router routing instances
Recursive next-hop resolution and tracked objects or RPM ping tests for route validity
Assuming an aggregate route is active without a contributing more-specific route, or forgetting that aggregate routes are inactive until a contributor exists.
Applying the firewall filter for filter-based forwarding without the routing-instance action or on the wrong interface direction.
Expecting a static route with an indirect next-hop to install when the recursive next-hop is unresolvable in inet.0.
Click any question to see the full explanation and answer options, or start a focused practice session above.
An administrator has configured a forwarding-type routing instance to perform filter-based forwarding. Which configuration statement is mandatory under the routing-instances hierarchy to properly define this instance type?
2By default, what is the Junos routing protocol preference value assigned to static routes?
3What is the primary function of a Junos routing instance of type 'forwarding'?
4You need to configure a static floating route that will only become active if the primary dynamic route learned via OSPF fails. Which configuration parameter must be adjusted to achieve this behavior?
5Which command allows you to inspect the active forwarding table entries and verify next-hops on a Junos router?
6You are configuring Filter-Based Forwarding (FBF) on an interface. You apply a firewall filter that matches specific source addresses and uses 'then routing-instance' as an action. What must be configured in that target routing instance to ensure return traffic is handled correctly?
7An administrator implements filter-based forwarding and applies a firewall filter on the ingress interface. However, traffic matching the filter is dropped rather than routed to the alternate routing instance. Upon investigation, what is the most likely cause of this issue?
8Which command is used to display all configured static routes along with their active/inactive status in Junos?
9When configuring a routing instance of type 'virtual-router', what is required to allow communication between the virtual router instance and the default routing instance?
10You want to ensure that a static route is only installed in the routing table when a specific tracked object or ping test succeeds. Which Junos feature should you pair with the static route?
11An administrator configures filter-based forwarding. The firewall filter uses the action 'then routing-instance custom-vr'. Where must the custom-vr routing instance be defined for the filter to accept this configuration without committing errors?
12You need to ensure that traffic entering interface ge-0/0/1 is forced into a specific forwarding routing instance named 'corp-fwd', regardless of the destination IP address in the packet header. Which configuration steps must you perform?
13Which Junos routing instance type is best suited when you want to run MPLS L3VPNs on a Provider Edge (PE) router?
14What is the default preference value for a direct route in Junos OS?
15An administrator configures a static route with a next-hop that points to an indirect (recursive) address. What condition must be met for this static route to become active in the inet.0 routing table?
16An engineer configures multiple static routes to the same destination with different preference values. When all paths are up, how does Junos select which route is active in the routing table?
17You are troubleshooting an aggregate route that is not being advertised to BGP peers. You verify that contributing routes are active in the routing table. What command should you use to check if the aggregate route itself is successfully generated and active in the local routing table?
18Which statement best describes the behavior of a local route in Junos OS?
19An engineer is configuring static routes in Junos OS and wants to ensure high availability. Which TWO features can be implemented with static routes to achieve path redundancy? (Choose two)
20When configuring load balancing in Junos OS, which THREE header fields can be included in the hashing algorithm to compute the ECMP path? (Choose three)
21When configuring Filter-Based Forwarding (FBF), which THREE components are absolutely mandatory for successful operation? (Choose three)
22An administrator wants to configure load balancing across multiple static routes. Which THREE configuration elements are required to successfully implement ECMP load balancing for static routes in Junos? (Choose three)
23When configuring a routing instance of type 'virtual-router', which THREE characteristics apply? (Choose three)
24Which TWO attributes distinguish direct routes from static routes in Junos OS? (Choose two)
25Which TWO parameters can be modified within a static route configuration to control path selection and backup behavior? (Choose two)
26Which TWO statements accurately describe the behavior and characteristics of a routing instance of type 'forwarding'? (Choose two)
27An engineer needs to configure a static IPv4 route on a Juniper Networks MX Series router pointing traffic destined for 192.168.100.0/24 to next-hop 10.0.0.1. Which configuration accomplishes this task?
28You have configured multiple static routes to the same destination with different preference values. When does Junos install a static route into the forwarding table (FIB)?
29An engineer configures an aggregate route for 172.16.0.0/16 on a Junos device. However, the aggregate route is not active in the routing table. What is the primary requirement for an aggregate route to become active?
30You are configuring a virtual router routing instance on a Juniper device to isolate traffic for a specific department. Which routing-instance type should you select?
31You need to configure filter-based forwarding (FBF) to route traffic from a specific subnet (192.168.1.0/24) through an alternate next-hop gateway. Which components are required to implement this successfully?
32Which routing-instance type is specifically designed to support Layer 3 VPNs (L3VPNs) utilizing BGP as the-peering protocol and MP-BGP for VPN route distribution?
33You are configuring a static route on a Junos device to a remote network reachable via a point-to-point interface. After committing, you notice the route appears in the routing table but is marked as hidden. Which of the following is the most likely cause?
34You have configured a qualified next-hop for a static route to 10.1.1.0/24 with a primary next-hop of 192.168.1.1 and a qualified next-hop of 192.168.1.2. Both next-hops are reachable. Under what condition will the qualified next-hop be used?
35You are configuring a static route to a destination and want to ensure that the route is not redistributed into OSPF. Which configuration statement should you use?
36You have configured a static route with a next-hop of 10.0.0.1 and a preference of 10. Another static route to the same destination has a next-hop of 10.0.0.2 and a preference of 5. Both next-hops are reachable. Which route will be active in the routing table?
37An engineer is configuring a static route with multiple qualified next hops to provide load balancing and redundancy. Which TWO statements are true regarding qualified next hops in Junos? (Choose two.)
Be able to read a Junos routing table and configuration and explain why a static, aggregate, or filter-based forwarding route is or is not active. The key is verifying next-hop resolution and, for aggregates, the presence of contributing routes before expecting installation.
The Courseiva JNCIS-ENT question bank contains 37 questions in the Protocol Independent Routing domain. Click any question to see the full explanation and answer breakdown.
Start with a 10-question focused session to identify your baseline accuracy in this domain. Read every explanation — even for questions you answer correctly — to understand the reasoning. Once you score consistently above 80%, move to a 20–30 question session to confirm depth before moving to the next domain.
Yes — the session launcher on this page draws questions exclusively from the Protocol Independent Routing domain. Choose 10, 20, 30, or 50 questions for a focused session, or click individual questions to review them one by one.
Save your results, see per-domain analytics, and get readiness scores — free, for every certification.
Sign Up FreeFree forever · Every certification included