Users Guide

Parameters
• 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 number of consecutive packets that can be missed 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 CONFIGURATION
Usage Information
Use this command to configure global BFD session settings. To configure the BFD parameters used in sessions
established with neighbors discovered by an L3 protocol, use the bfd all-neighbors command. The no
version of this command deletes the configured global settings and returns to the default values.
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 configures 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 configuration takes precedent over the OSPF global level BFD configuration. If there is no BFD
configuration present at the interface level global OSPF BFD configuration will be inherited.
Example
(conf-if-eth1/1/1)#ip ospf bfd all-neighbors
508 Layer 3