bfd all-intfs-on

Use this command to enable the Bidirectional Forwarding Detection (BFD) protocol on all OSPF interfaces.

Syntax

Parameters

None.

Defaults

The BFD protocol is enabled on all OSPF interfaces by default.

Mode

OSPF router configuration.

Usage

BFD is used to detect a communications failure with an OSPF forwarding plane next-hop. BFD detects failures in under one second. BFD augments the OSPF Hello mechanism. The OSPF Hello interval defaults to 10 seconds. With high speed data rates, a failure requiring multiple seconds to detect can result in significant data loss. The OSPF implementation of the BFD protocol uses the following non-configurable parameters:

Transmit Interval – The period of time between the transmission of BFD control packets, set for 100ms.

Receive Interval – The period of time between received BFD control packets, set for 100ms.

Detection Multiplier – The Number of consecutive control packets that can be missed before the BFD session transitions to down, set to 3.

The “no” form of this command disables the BFD protocol on all OSPF interfaces.