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A network architect must redesign a data center on OSPFv2. The network must perform fast reconvergence between directly connected switches. Which two actions must be taken to meet the requirement? (Choose two)

A.

Configure all links on AREA 0.

Answers
A.

Configure all links on AREA 0.

B.

Implement a virtual link between the switches.

Answers
B.

Implement a virtual link between the switches.

C.

Use OSPF point-to-point links only.

Answers
C.

Use OSPF point-to-point links only.

D.

Set low OSPF hello and DEAD timers.

Answers
D.

Set low OSPF hello and DEAD timers.

E.

Enable BFD for failure detection.

Answers
E.

Enable BFD for failure detection.

Suggested answer: D, E

Explanation:

To achieve fast reconvergence between directly connected switches in a data center using OSPFv2, two critical actions must be taken. First, setting low OSPF hello and DEAD timers can significantly reduce the time it takes for OSPF to detect a link failure and start the reconvergence process. This is because OSPF hello packets are used to maintain neighbor relationships, and the DEAD timer determines how long a router will wait without receiving a hello packet before declaring the neighbor down. By reducing these timers, OSPF can detect failures more quickly and initiate a faster reconvergence.

Second, enabling Bidirectional Forwarding Detection (BFD) for failure detection is essential. BFD is a network protocol that provides fast failure detection times for all media types, encapsulations, topologies, and routing protocols.By implementing BFD, OSPF can be notified of link failures almost immediately, allowing for a rapid response to changes in the network topology and ensuring minimal disruption to data flows2.

asked 10/10/2024
Keona Campbell
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