300-510 · Question #32
Refer to the exhibit. Router 1 is connected to router 2 on interface TenGigE0/1. Which interface provides the alternate path to 172.16.200.9/32 when the link between router 1 and router 2 goes down?
The correct answer is C. TenGigE0/2 interface provides the alternate path. When the primary link on TenGigE0/1 (connecting Router 1 to Router 2) goes down, the routing protocol (likely OSPF or IS-IS with Loop-Free Alternate/TI-LFA enabled) automatically computes an alternate path. TenGigE0/2 provides that alternate path because it connects Router 1 to a
Question
Refer to the exhibit. Router 1 is connected to router 2 on interface TenGigE0/1. Which interface provides the alternate path to 172.16.200.9/32 when the link between router 1 and router 2 goes down?
Exhibit
Options
- ATenGigE0/1 interface provides the alternate path
- BA backup path must be statically installed
- CTenGigE0/2 interface provides the alternate path
- DA primary path must be manually installed
How the community answered
(32 responses)- A6% (2)
- B16% (5)
- C75% (24)
- D3% (1)
Explanation
When the primary link on TenGigE0/1 (connecting Router 1 to Router 2) goes down, the routing protocol (likely OSPF or IS-IS with Loop-Free Alternate/TI-LFA enabled) automatically computes an alternate path. TenGigE0/2 provides that alternate path because it connects Router 1 to another router in the topology that can still reach 172.16.200.9/32. Options A is incorrect because TenGigE0/1 is the failed interface. Options B and D are incorrect because fast-reroute mechanisms like LFA or TI-LFA provide automatic failover without requiring manual static route intervention.
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