Alcatel-Lucent 6850-48 Network Guide

Configuring BFD

BFD Application Example

OmniSwitch AOS Release 6 Network Configuration Guide

page 30-29

-> ip bfd-std interface vlan-23

-> ip bfd-std interface vlan-23 status enable

-> ip bfd-std interface vlan-20

-> ip bfd-std interface vlan-20 status enable

-> ip bfd-std interface vlan-23

-> ip bfd-std interface vlan-23 status enable

-> ip bfd-std interface vlan-31

-> ip bfd-std interface vlan-31 status enable

-> ip bfd-std interface vlan-30

-> ip bfd-std interface vlan-30 status enable

Global BFD parameter settings for timer values and operational mode are applied to all BFD interfaces 
configured on the switch. When a BFD interface is created, the global settings are also applied as the 
default parameter values for the interface.

By default, global BFD parameter values are already set. The following steps change these values for the 
example network; the commands used are the same on each router.

• Set the minimum amount of time BFD waits between each transmission of control packets to 200.

-> ip bfd-std transmit 200 

milliseconds

• Set the minimum amount of time BFD waits to receive control packets to 200 milliseconds.

-> ip bfd-std receive 200

• Set the BFD protocol operational mode to asynchronous.

-> ip bfd-std mode asynchronous mode enable

• Set the global BFD Echo packet time interval to 200 milliseconds.

-> ip bfd-std echo interval 200

• Set the amount of time BFD remains in a hold-down state to 500 milliseconds.

-> ip bfd-std l2-holdtimer 500

Once all the global BFD parameters are configured, enable BFD on all interfaces, register BFD with 
OSPF, and then enable BFD on all OSPF interfaces. The following steps are the same on each router:

-> ip bfd-std status enable

-> ip ospf bfd-std status enable

-> ip ospf bfd-std all-interfaces

After the network has been created, use the following show commands to check various aspects of the 
example network: