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| -rw-r--r-- | docs/configuration/protocols/bfd.rst | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/docs/configuration/protocols/bfd.rst b/docs/configuration/protocols/bfd.rst index 4812f930..8d19334c 100644 --- a/docs/configuration/protocols/bfd.rst +++ b/docs/configuration/protocols/bfd.rst @@ -9,6 +9,12 @@ BFD :abbr:`BFD (Bidirectional Forwarding Detection)` is described and extended by the following RFCs: :rfc:`5880`, :rfc:`5881` and :rfc:`5883`. +In the age of very fast networks, a second of unreachability may equal millions of lost packets. +The idea behind BFD is to detect very quickly when a peer is down and take action extremely fast. + +BFD sends lots of small UDP packets very quickly to ensures that the peer is still alive. + +This allows avoiding the timers defined in BGP and OSPF protocol to expires. Configure BFD ============= |