Alcatel-Lucent 6850-48 Network Guide
Configuring BFD
Configuring BFD
OmniSwitch AOS Release 6 Network Configuration Guide
September 2009
page 30-23
2 Once VRRP is registered with BFD at the protocol level, you need to enable BFD for a particular
VRRP track policy using the
VRRP track policy using the
command. Ensure that the track policy is associ-
ated with at least one of the virtual routers. For example:
-> vrrp track 2 address 10.1.1.1 bfd-std enable
The above command enables BFD for a track policy with VRRP track number 2 and a remote interface
address of 10.1.1.1.
address of 10.1.1.1.
Note. The value of the address parameter should be a remote interface address. BFD cannot be configured
for a local interface address.
for a local interface address.
You can verify whether BFD is enabled for a particular track policy by using the
show vrrp track
command as shown below:
-> show vrrp track
3 Once VRRP is registered with BFD at the protocol level, and BFD is configured for the relevant track
policies, VRRP protocol informs BFD-CMM about the VRID primary interface address and the remote
address which should be tracked. BFD-CMM, in turn, adds these interfaces to its interface list. You can
use the
policies, VRRP protocol informs BFD-CMM about the VRID primary interface address and the remote
address which should be tracked. BFD-CMM, in turn, adds these interfaces to its interface list. You can
use the
command to verify this.
Once the configured track policy is associated with VRID, BFD-CMM establishes the BFD session with
the remote address. BFD-CMM also informs the BFD-NI about the interface and its respective neigh-
bor(s), and requests it to establish BFD sessions with them. You can use the
the remote address. BFD-CMM also informs the BFD-NI about the interface and its respective neigh-
bor(s), and requests it to establish BFD sessions with them. You can use the
command to view BFD sessions with all BFD neighbors, as shown below:
-> show ip bfd-std sessions
Neighbor Interface Local Remote Negotiated Negotiated Echo Rx
IP Address Address State Disc Disc Tx Rx
-----------+------------+-------+------+------+------------+----------+----------
25.25.25.1 25.25.25.25 UP 45 53 100 100 200
26.26.26.63 26.26.26.36 INIT 43 21 200 200 200
Whenever there is any change in a track policy or change in VRID status with respect to the protocol,
VRRP immediately informs BFD-CMM about the changes. Additionally, whenever BFD-NI detects any
changes to the other end, it immediately informs BFD-CMM about the changes. BFD-CMM, then, updates
its database accordingly and informs VRRP for its fastest convergence.
VRRP immediately informs BFD-CMM about the changes. Additionally, whenever BFD-NI detects any
changes to the other end, it immediately informs BFD-CMM about the changes. BFD-CMM, then, updates
its database accordingly and informs VRRP for its fastest convergence.
trap generation: Enabled
startup delay: 75
startup delay: 75
IP
Admin Adv.
BFD
VLAN Address(es)
Status Priority Preempt Interval Status
+-----+--------------+----------+----------+----------+---------+------------
1 192.168.170.1 Enabled 255 Yes 1 Enabled
192.168.170.2
15 10.2.25.254 Disabled 100 No
192.168.170.2
15 10.2.25.254 Disabled 100 No
1
Disabled
Track Admin Oper
BFD
ID Policy State State Pri Status
-----+---------------------------------------+----------+------+-----+-----------
1 25.25.25.1 Enabled Down 50 Enabled
2 192.10.150.42
-----+---------------------------------------+----------+------+-----+-----------
1 25.25.25.1 Enabled Down 50 Enabled
2 192.10.150.42
Enabled Down 25 Enabled