mediumMultiple ChoiceObjective-mapped
300-410 Practice Question: A router has the following BFD configuration for…
A router has the following BFD configuration for a static route:
ip route 10.0.0.0 255.255.255.0 192.168.1.2
bfd map 192.168.1.2 10.0.0.0 255.255.255.0
interface GigabitEthernet0/0 ip address 192.168.1.1 255.255.255.0
bfd interval 100 min_rx 100 multiplier 3 !
What is the purpose of the 'bfd map' command in this context?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
It creates a BFD session to the next-hop 192.168.1.2 and associates it with the static route to 10.0.0.0/24.
For static routes, BFD must be explicitly mapped to the next-hop and destination prefix. The 'bfd map' command associates a BFD session with a static route so that if BFD detects a failure, the static route is removed from the routing table.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
It maps the BFD session to the interface, enabling BFD for all static routes using that interface.
Why it's wrong here
The 'bfd map' command is specific to a next-hop and prefix; it does not apply to all static routes on the interface.
- ✓
It creates a BFD session to the next-hop 192.168.1.2 and associates it with the static route to 10.0.0.0/24.
Why this is correct
Correct. The 'bfd map' command creates a BFD session to the specified next-hop and ties it to the static route so that the route is withdrawn if BFD goes down.
- ✗
It maps the BFD session to the OSPF process, which is incorrect for static routes.
Why it's wrong here
Static routes do not use OSPF; the 'bfd map' is specifically for static routes.
- ✗
It is used to configure BFD for multiple static routes simultaneously.
Why it's wrong here
Each static route requires its own 'bfd map' command.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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