Users Guide

Since VTEP relies on service nodes to replicate BUM traffic, we need a mechanism to monitor the connectivity between the
VTEP and the service nodes. BFD can be used to monitor the connectivity between the VTEP and service nodes, and detects
failures. The NSX controller provides parameters, such as the minimum TX and RX interval, and the multiplier, to initiate the BFD
session between the VTEP and the service nodes. To establish a BFD session, enable the BFD on the controller and the VTEP.
To enable BFD in the VTEP, use bfd enable command.
NOTE:
In controller-provisioned VXLAN, the VTEP establishes a BFD session with the service nodes using the controller-
provided parameters instead of the parameters configured at the VTEP.
If BFD is not enabled in the VTEP, the VTEP uses IP reachability information to monitor connectivity to the service node.
To view established sessions, use the show bfd neighbors command.
OS10# show bfd neighbors
* - Active session role
-----------------------------------------------------------------------------------------
-
LocalAddr RemoteAddr Interface State RxInt TxInt Mult VRF Clients
-----------------------------------------------------------------------------------------
-
* 55.55.5.5 2.2.2.2 virtual-network0 up 1000 1000 3 default vxlan
* 55.55.5.5 2.2.2.3 virtual-network0 up 1000 1000 3 default vxlan
View replicators
To view the state of the replicators, use the show nve replicators command.
● Show output with details about the replicators received from the controller.
OS10# show nve replicators
Codes: * - Active Replicator
BFD Status:Enabled
Replicators State
-----------------------
2.2.2.3 Up
2.2.2.2 Up
VXLAN
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