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Dell SmartFabric OS10 User Guide Release 10.5.3

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Establishing BFD sessions with OSPFv2 neighbors in a non-default VRF instance

To establish BFD sessions with OSPFv2 neighbors in a non-default VRF instance:
  1. Enable BFD globally
    bfd enable
    CONFIGURATION Mode
  2. Enter INTERFACE CONFIGURATION mode
    interface interface-name
    CONFIGURATION Mode
  3. Associate a non-default VRF with the interface you have entered.
    ip vrf forwarding vrf1
    INTERFACE CONFIGURATION Mode
  4. Assign an IP address to the VRF.
    ip address ip-address
    VRF CONFIGURATION Mode
  5. Attach the interface to an OSPF area.
    ip ospf ospf-instance area area-address
    VRF CONFIGURATION Mode
  6. Establish BFD session with OSPFv2 neighbors in a single OSPF interface in a non-default VRF instance.
    ip ospf bfd all-neoghbors
    VRF CONFIGURATION Mode
  7. Enter ROUTER-OSPF mode in a non-default VRF instance.
    router ospf ospf-instance vrf vrf-name
  8. Establish BFD sessions with all OSPFv2 instances in a non-default VRF.
    bfd all-neighbors
OS10# show running-configuration ospf 
!
interface vlan200
 no shutdown
 ip vrf forwarding red
 ip address 20.1.1.1/24
 ip ospf 200 area 0.0.0.0
 ip ospf bfd all-neighbors disable
!
interface vlan300
 no shutdown
 ip vrf forwarding red
 ip address 30.1.1.1/24
 ip ospf 200 area 0.0.0.0
!
router ospf 200 vrf red
 bfd all-neighbors
 log-adjacency-changes
 router-id 2.3.3.1
!

In this example OSPF is enabled in non-default VRF red. BFD is enabled globally at the router OSPF level and all the interfaces associated with this VRF OSPF instance inherit the global BFD configuration. However, this global BFD configuration does not apply to interfaces in which the interface level BFD configuration is already present. Also, VLAN 200 takes the interface level BFD configuration as interface-level BFD configuration takes precedent over the global OSPF-level BFD configuration.

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