An engineer manages a high availability network and requires fast failover of the routing protocols. The engineer decides to implement BFD. Which three dynamic routing protocols support BFD? (Choose…

The correct answer is A. OSPF D. BGP E. RIP. Bidirectional Forwarding Detection (BFD) is a fast hello protocol used to detect forwarding path failures rapidly, enabling routing protocols to trigger failover in milliseconds. On Palo Alto Networks firewalls, BFD is supported with OSPF (A), BGP (D), and RIP (E). IGRP (B) is…

Submitted by valeria.br· Apr 18, 2026Core Concepts

Question

An engineer manages a high availability network and requires fast failover of the routing protocols. The engineer decides to implement BFD. Which three dynamic routing protocols support BFD? (Choose three.)

Options

AOSPF
BIGRP
COSPFv3 virtual link
DBGP
ERIP

How the community answered

(47 responses)

A
85% (40)
B
4% (2)
C
11% (5)

Explanation

Bidirectional Forwarding Detection (BFD) is a fast hello protocol used to detect forwarding path failures rapidly, enabling routing protocols to trigger failover in milliseconds. On Palo Alto Networks firewalls, BFD is supported with OSPF (A), BGP (D), and RIP (E). IGRP (B) is a deprecated Cisco-proprietary routing protocol that is no longer in active use and does not support BFD. OSPFv3 virtual links (C) are explicitly excluded from BFD support because BFD requires a direct Layer 3 adjacency - virtual links are logical tunnels across a transit area, making them incompatible with BFD's direct link-detection mechanism.

Topics

#BFD#Dynamic Routing Protocols#High Availability#Fast Failover

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