Administrator Guide

Audio Video Bridging 1595
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Audio Video Bridging
Dell Networking N4000 Series Switches
Overview
Audio Video Bridging (AVB) is a suite of protocols for reserving resources in
the network to facilitate an end-to-end time-sensitive traffic flow. AVB uses
the following protocols:
• IEEE 802.1AS—Measures wire propagation time for precise
synchronization.
• Multiple VLAN Registration Protocol (MVRP)—Replaces the role of
GVRP in dynamic VLAN creation. MVRP propagates dynamic VLAN
information to participating bridges. The participating bridges register (or
withdraw) VLAN ID registrations for propagation of AVB streams. If a
VLAN ID is dynamically registered on a bridge port, the bridge forwards
frames for that VLAN ID on the port.
• Multiple MAC Registration Protocol—Replaces the role of GMRP in
dynamic (M)FDB entry creation. MMRP propagates the association of a
MAC address (associated with an AVB stream) to a VLAN. This helps to
determine to what part of a network a given MAC address needs to be
transmitted. If a MAC address is registered on a bridge port by MMRP, the
bridge forwards frames addressed to that MAC address on the port.
• Multiple Stream Reservation Protocol (MSRP)—Controls bandwidth
reservation of the audio-video stream. MSRP calculates the reservation
size, protects port queues by remapping conflicting traffic, and shapes
traffic according to the reservation criteria. MSRP defines the payloads and
rules for propagating registrations for talkers (stream sources) and listeners
(stream destinations).
AVB data is usually multicast traffic, not necessarily in standard IPv4
multicast format. For example, the IEEE 1722 Audio Video Transport
Protocol uses MAC addresses in the following ranges:
NOTE: This feature is available on Dell Networking N4000 Series switches only.