Step 6: Configure Global Bfd Parameters; Step 7: Enable And Register Bfd With Ospf; Step 8: Examine The Network - Alcatel-Lucent OmniSwitch 6850-48 Network Configuration Manual

Configuring BFD
-> 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
Router 3
-> 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

Step 6: Configure Global BFD Parameters

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
•
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

Step 7: Enable and Register BFD with OSPF

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

Step 8: Examine the Network

After the network has been created, use the following show commands to check various aspects of the
example network:
OmniSwitch AOS Release 6 Network Configuration Guide
milliseconds
September 2009
BFD Application Example
page 30-29