Under Junos
there is several HA (High Availability) features, like NSR, Graceful Restart,
Graceful RE Switchover and of course BFD. I’ll be briefly write about it and
I’ll configure it on two Juniper routers under OSPF process.
What the
BFD is actually?
Bidirectional
Forwarding Protocol is protocol that is used to detect faults between two
forwarding engines connected by link.
BFD is
vendor and protocol independent and operates on top of any data protocol
(network layer, link layer, tunnels, etc.) It is very light weight on resources (CPU,
Memory) in compered with other protocol faults mechanism, such Hello under OSPF
which is very slow compared with BFD.
The benefits
of BFD are that provide a single method for managing protocol timers.
Supported
protocols are:
- OSPF
- Static
- IS-IS
- RIP
- iBGP
- EBGP
- RSVP
