BFD for OSPF
Bidirectional Forwarding Detection (BFD)
for OSPFv2 and OSPFv3 can be configured so that OSPF is a registered protocol with BFD and
receives forwarding path detection failure messages from BFD.
BFD sessions can rapidly detect link faults and
notify OSPF so that it quickly responds to network topology changes. BFD support for
OSPF is disabled by default.
Consider the following when you configure BFD
for OSPF:
- OSPF uses single-hop BFD sessions.
- Virtual links are not supported.
- BFD for OSPF can be enabled in
interface subtype configuration mode, OSPF VRF configuration mode, or OSPFv3
configuration mode. BFD must be enabled at the interface level and the global
level to enable BFD for OSPF sessions.
- OSPF sends BFD a registration message
even if BFD is not enabled on an interface or globally at the router OSPF level.
- Registration is global across all VRFs.
- BFD sessions are maintained across OSPF
graceful restart.
- BFD for OSPF does not support
authentication for BFD.
