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| author | maehdros <bruno@maehdros.com> | 2021-01-12 21:58:28 +0100 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2021-01-12 21:58:28 +0100 |
| commit | 16852e808e38f3f1cb4bcd8784748960702c6e66 (patch) | |
| tree | b3665fb0708bb4bdf35d2e6626addc4d4034d64d | |
| parent | f379d9196375cdb5543877af0a4b82e313c117bc (diff) | |
| download | vyos-documentation-16852e808e38f3f1cb4bcd8784748960702c6e66.tar.gz vyos-documentation-16852e808e38f3f1cb4bcd8784748960702c6e66.zip | |
BFD: Added explanation on the purpose
| -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 ============= |