Alcatel-Lucent 6850-48 Guia De Rede
Configuring BFD
Configuring BFD
page 30-22
OmniSwitch AOS Release 6 Network Configuration Guide
September 2009
To disable BFD for all configured BGP neighbors, use the
with the no
keyword, as shown below:
-> no ip bgp bfd-std all-neighbors
To display the BFD status of BGP neighbors, use the
show ip bgp neighbors
command. For example:
-> show ip bgp neighbors
Thereafter when there are any neighbors established to this interface, BGP informs the BFD-CMM about
any newly added neighbor(s); BFD-CMM, in turn, informs the BFD-NI about the neighbor(s) and requests
it to establish BFD sessions with them. You can use the
any newly added neighbor(s); BFD-CMM, in turn, informs the BFD-NI about the neighbor(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 to the neighbor/interface list or neighbor/interface state, BGP 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 accord-
ingly and informs BGP for its fastest convergence.
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 accord-
ingly and informs BGP for its fastest convergence.
Configuring BFD Support for VRRP Tracking
The steps below show you how to configure and verify BFD support for VRRP protocol, so that VRRP is
a registered protocol with BFD and will receive forwarding path detection failure messages from BFD.
a registered protocol with BFD and will receive forwarding path detection failure messages from BFD.
1 To encapsulate BFD within the VRRP protocol, you need to first register VRRP with BFD at the proto-
col level using the
col level using the
command as shown below:
-> vrrp bfd-std enable
Note. The BFD status for VRRP protocol is disabled by default. Also, VRRP protocol supports BFD in the
echo-only operational mode.
echo-only operational mode.
BFD status for VRRP protocol is now enabled which means that socket communication between VRRP
and BFD is enabled. To de-register VRRP with BFD, enter the following command at the system prompt:
and BFD is enabled. To de-register VRRP with BFD, enter the following command at the system prompt:
-> vrrp bfd-std disable
To verify the BFD status for VRRP protocol, you can use the show vrrp command as shown below:
-> show vrrp
Legends:Nbr = Neighbor
As = Autonomous System
Nbr Address As
As = Autonomous System
Nbr Address As
Admin state Oper state BgpId
Up/Down
BFD Status
-------------+---+-------------+-------------+-------------+------------+-----------
192.40.4.29 3
192.40.4.29 3
enabled
established 192.40.4.29 00h:14m:48s enabled
192.40.4.121
5
disabled
idle
0.0.0.0
00h:00m:00s disabled