What is the difference between an SFM and an SFU?

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Question

There are definitions of:

  1. Selective Forwarding Middlebox (abbreviated SFM) defined in RFC 7667 Section 3.7
  2. Selective Forwarding Unit (abbreviated SFU) defined in WebRTC Glossary

What is the difference of these things? Are they essentially the same?

webrtc rtp media real-time
1 Answers

They are the same. The usage of SFU in a WebRTC context predates RFC 7667 and is hence a much more commonly used term (ironically the RFC itself still mentions 'SFU' in one place without defining the term).

See also this commit which does a simple replace of SFU with SFM.

user_43527720
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