Users Guide

Usage Information Use the bfd interval command to congure global BFD session settings. To congure the BFD parameters
used in sessions established with neighbors discovered by an L3 protocol, use the bfd all-neighbors
command. To remove the congured global settings and return to the default values, enter the no version of the
command.
Example
OS10(config)# bfd interval 250 min_rx 300 multiplier 4 role passive
Supported releases 10.4.1.0 or later
ip ospf bfd all-neighbors
Enables and congures the default BFD parameters for all OSPFv2 neighbors in this interface.
Syntax
ip ospf bfd all-neighbors [disable|[interval millisec min_rx min_rx multiplier
role {active | passive}]]
Parameters
• disable — Disables the BFD session on an interface alone.
• interval milliseconds — Enter the time interval for sending control packets to BFD peers, from 100 to
1000. Dell EMC recommends using more than 100 milliseconds.
• min_rx milliseconds — Enter the maximum waiting time for receiving control packets from BFD peers,
from 100 to 1000. Dell EMC recommends using more than 100 milliseconds.
•
multiplier number — Enter the maximum number of consecutive packets that must not be received
from a BFD peer before the session state changes to Down, from 3 to 50.
• role {active | passive} — Enter active if the router initiates BFD sessions. Both BFD peers can be
active at the same time. Enter passive if the router does not initiate BFD sessions, and only responds to a
request from an active BFD to initialize a session.
Default
The time interval for sending control packets to BFD peers is 200 milliseconds.
The maximum waiting time for receiving control packets from BFD peers is 200 milliseconds.
The number of consecutive packets that must be received from a BFD peer is 3.
The BFD role is active
Command Mode CONFIG-INTERFACE
Usage Information
• This command can be used to enable or disable BFD for an interface associated with OSPFv2. Interface level
BFD conguration takes precedent over the OSPF global level BFD conguration. If there is no BFD
conguration present at the interface level global OSPF BFD conguration will be inherited.
Example
(conf-if-eth1/1/1)#ip ospf bfd all-neighbors
Supported releases 10.4.2E or later
ipv6 ospf bfd all-neighbors
Enables and congures the default BFD parameters for all OSPFv3 neighbors in this interface.
Syntax
ipv6 ospf bfd all-neighbors [disable|[interval millisec min_rx min_rx
multiplier role {active | passive}]]
492 Layer 3