Handling Unavailability of the 10.0.0.0/16 Route
Question
-- Exhibit --
user@router> show route 0/0 exact detail
inet.0: 14 destinations, 14 routes (14 active, 0 holddown, 0 hidden)
0.0.0.0/0 (1 entry, 1 announced)
*Aggregate PreferencE. 130
Next hop typE. Router, Next hop index:
Next-hop reference count: 4 -
Next hop: 172.30.25.1 via ge-0/0/1.100, selected
StatE.
Local AS: 65400 -
AgE. 1:03:46 -
Task: Aggregate -
Announcement bits (2): 0-KRT 2-OSPF
AS path: I -
Flags: Generate Depth: 0 Active -
Contributing Routes (1):
10.0.0.0/16 proto BGP
-- Exhibit --
Click the Exhibit button.
You are advertising the route in the exhibit to your OSPF neighbors.
What happens if the 10.0.0.0/16 route is unavailable?
Answers
Explanations
Click on the arrows to vote for the correct answer
A. B. C. D.B
Based on the provided exhibit, the router is advertising a default route (0.0.0.0/0) to its OSPF neighbors through BGP. The contributing route for this advertisement is a BGP route for the prefix 10.0.0.0/16.
If the BGP route for 10.0.0.0/16 becomes unavailable, the default route will still be active and advertised to OSPF peers. This is because the router has a static route for the default route and is not dependent on the BGP route for the prefix 10.0.0.0/16.
Option C is therefore the correct answer: "The default route will remain active and will continue to be advertised to your OSPF peers."
Option A is incorrect because if the default route was "blackholed," all traffic from OSPF peers would be dropped, which is not desirable.
Option B is incorrect because the unavailability of the BGP route for 10.0.0.0/16 does not affect the availability of the default route.
Option D is incorrect because if the default route became unavailable, it would not be advertised to OSPF peers. However, as explained earlier, the default route is not dependent on the BGP route for the prefix 10.0.0.0/16, so this scenario is not relevant in this case.
