Alcatel-Lucent OmniSwitch AOS Release 7 Manual page 365

Configuring BFD
6
To establish BFD sessions with neighbors that are in full state only, enter the
state drs-only command as shown below:
-> ip ospf interface int1 bfd-state drs-only
The above command establishes a BFD session on interface named int1 with OSPF DR neighbors in full
state only.
To establish a BFD session on an interface with all neighbors which are greater than or equal to "2-way"
state, use the ip ospf interface bfd-state all-neighbors
-> ip ospf interface int2 bfd-state all-neighbors enable
The above command establishes a BFD session on interface named int2 with all OSPF neighbors that are
greater than or equal to "2-way" state.
When any neighbors are added to this interface, OSPF informs BFD about the newly added neighbor(s);
BFD then establishes a session with them. Use the
with all BFD neighbors as shown below:
-> show ip bfd sessions
Legends: Neg.
Discr
Intvl
Local Interface
Discr Name
------+-----------+--------------+----------+------+----------+--------+-------
1 v1001
2 v2000
To view a BFD session with a particular neighbor, use the
session number. For example:
-> show ip bfd sessions 1
Local discriminator
Neighbor IP Address
Requested Session Type
Interface IfIndex
Source UDP Port
State
Session Operating Mode
Remote discriminator
Negotiated Tx interval
Negotiated Rx interval
Echo Rx interval
Multiplier
Applications Registered:
Whenever there is any change to the interface/neighbor list or interface/neighbor state, OSPF immediately
informs BFD about the changes. Additionally, whenever BFD detects any changes to the other end, BFD
updates its database accordingly and informs OSPF for its fastest convergence.
OmniSwitch AOS Release 7 Network Configuration Guide
= Negotiated
= Discriminator
= Interval (in milliseconds)
Neighbor State
Address
101.1.1.11 UP
200.1.1.1 UP
= 1,
= 101.1.1.11,
= ASYNC ,
= 2,
= 49153,
= UP,
= None,
= 1,
= 300,
= 300,
= 300,
= 3,
= OSPF
command as shown below:
show ip bfd sessions command to view BFD sessions
Remote Neg. Rx
Discr Intvl
1 300
0 0
show ip bfd sessions
March 2011
Configuring BFD
ip ospf interface bfd-
Neg. Tx EchoRx
Intvl Intvl
300 300
0 300
command followed by the
page 16-17