Audio Video Bridging (AVB) - Arista Networks · Audio Video Bridging (AVB) is a protocol set that provides precision time synchronization, admission control, queuing reservation,

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Chapter 42

Audio Video Bridging (AVB)Arista switches support Audio Video Bridging (AVB) and the associated protocols. This chapterdescribes AVB concepts and the implementation of associated protocols.

Sections in this chapter include:

• Section 42.1: AVB Overview

• Section 42.2: AVB Protocols

• Section 42.3: AVB Configuration

• Section 42.4: AVB Command Descriptions

42.1 AVB OverviewAudio Video Bridging (AVB) is a protocol set that provides precision time synchronization, admissioncontrol, queuing reservation, and guaranteed bandwidth of professional grade quality audio and videoacross an IP network.

Supported AVB protocols include:

• Generalized Precision Time Protocol (gPTP)

• Multiple Stream Reservation Protocol (MSRP)

• Multiple VLAN Registration Protocol (MVRP)

These AVB features are supported on Arista 7280, 7150 Series, and 7500E Series switches:

• gPTP with hardware time stamping

• gPTP Grandmaster function

• MSRP protocol on Ethernet interfaces: stream admission control and propagation

• Control plane protection for PTP and MSRP control frames

• MVRP

• Traffic classes 2 and 3 for AVB traffic

• Traffic shaping on egress ports

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AVB Protocols Chapter 42: Audio Video Bridging (AVB)

These AVB features are not available on Arista switches:

• MSRP protocol on LAGs

• MSRP co-ordination with gPTP; streams are allowed even when gPTP is not in sync

• MMRP

• Signaling message support in gPTP

• Running peer delay mechanism on STP blocked ports

• Grandmaster-specific state machines (gPTP)

42.2 AVB ProtocolsThis section describes supported AVB protocols:

• Section 42.2.1: gPTP

• Section 42.2.2: MVRP

• Section 42.2.3: MSRP

• Section 42.2.4: MRP

42.2.1 gPTP

Generalized Precision Time Protocol (gPTP) is a network time synchronization standard for bridgedLocal Area Networks based on the IEEE 1588v2 Precision Time Protocol and supports the AVBprotocol standards. Time synchronization in a gPTP domain is conducted the same way as in a PTP1588 domain. A grandmaster is selected through the best grand master clock algorithm and distributestiming synchronization information to all directly attached peers. This information is propagated acrossthe network to provide a common time reference to all Audio and Video end stations.

42.2.2 MVRP

Multiple VLAN Registration Protocol (MVRP) is an application of Multiple Registration Protocol used byAVB endpoints to dynamically register and unregister VLANs on an interface.

When an interface wishes to join a VLAN advertised by an MSRP talker (to receive a stream), MVRPsends a Join message. On receiving the Join message, the interface is added to the VLAN. If the VLANdoes not already exist, MVRP dynamically creates the VLAN and propagates it through the network.

MVRP events post Syslog messages, with the severity level of INFO for each message.

• MVRP_VLAN_JOIN

MVRP VLAN Join received/transmitted on an interface.

• MVRP_VLAN_LV

MVRP VLAN Leave received/transmitted on an interface.

• MVRP_ERROR

MVRP Join was discarded due to an error.

Chapter 42: Audio Video Bridging (AVB) AVB Protocols

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42.2.3 MSRP

Multiple Stream Registration Protocol (MSRP) is a signaling protocol that allows end stations (nodes)to reserve network resources and ensure QoS for communicating with other end stations.

MSRP nodes are specified as talkers or listeners:

• Talker nodes transmit multimedia streams to other nodes in the AVB network.

• Listener nodes receive multimedia streams from the AVB talker nodes.

MSRP is implemented by the switch on individual interfaces. MSRP is active when it is enabled on atleast one interface, and stopped when it is disabled on all interfaces. MSRP uses Multiple RegistrationProtocol (MRP) to facilitate attribute registrations and distribution across connected end points in a LANenvironment.

MSRP events post Syslog messages, with the severity level of INFO for each message.

• MSRP_SR_CLASS_TRANSITION

MSRP SR Class state transition occurred on an interface.

• MSRP_TALKER_ADV_JOIN

Talker Advertise Join message for a stream was transmitted/received on an interface.

• MSRP_TALKER_FAIL_JOIN

Talker Failed Join message for a stream was transmitted/received on an interface.

• MSRP_LISTENER_JOIN

Listener Join message for a stream was transmitted/received on an interface.

• MSRP_DOMAIN_JOIN

Domain Join message was transmitted/received on an interface.

• MSRP_TALKER_ADV_LV

Talker Advertise Leave message for a stream was transmitted/received on an interface.

• MSRP_TALKER_FAIL_LV

Talker Failed Leave message for a stream was transmitted/received on an interface.

• MSRP_LISTENER_LV

Listener Leave message for a stream was transmitted/received on an interface.

• MSRP_DOMAIN_LV

Domain Leave message was transmitted/received on an interface.

• MSRP_BW_ALLOC_SUCCESS

MSRP Bandwidth was allocated for a listener on an interface.

• MSRP_BW_ALLOC_FAIL

MSRP Bandwidth could not be allocated for a listener on an interface.

• MSRP_BW_DEALLOC

MSRP Bandwidth was de-allocated for a listener on an interface.

• MSRP_ERROR

MSRP Join was discarded because of an error.

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AVB Protocols Chapter 42: Audio Video Bridging (AVB)

42.2.4 MRP

Multiple Registration Protocol (MRP) protocol includes MSRP and MVRP, and allows participants in anMRP application to register attributes with participants in a Bridged Local Area Network (BLAN).

Chapter 42: Audio Video Bridging (AVB) AVB Configuration

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42.3 AVB ConfigurationThis section describes the AVB configuration:

• Section 42.3.1: Enabling gPTP

• Section 42.3.2: Enabling MSRP

• Section 42.3.3: Displaying MSRP Configuration and Status

• Section 42.3.4: Enabling MVRP

• Section 42.3.5: Displaying MVRP Configuration and Status

42.3.1 Enabling gPTP

Configure gPTP on the switch though the ptp mode command. PTP is enabled on individual interfaceswith the ptp enable command.

Example

• These commands configure gPTP on the switch and enable PTP on Ethernet interfaces 41-45.

switch(config)#ptp mode gptpswitch(config)#interface ethernet 41-45switch(config-if-Et41-45)#ptp enableswitch(config)#show running-config

<-------OUTPUT OMITTED FROM EXAMPLE-------->!ptp mode gptp!

<-------OUTPUT OMITTED FROM EXAMPLE-------->endswitch(config-if-Et41-45)#show activeinterface Ethernet41 speed forced 10000full msrp ptp enableinterface Ethernet42 speed forced 10000full msrp ptp enableinterface Ethernet43 speed forced 10000full msrp ptp enableinterface Ethernet44 speed forced 10000full ptp enableinterface Ethernet45 ptp enableswitch(config-if-Et41-45)#

42.3.2 Enabling MSRP

MSRP is enabled on an interface with the msrp command.

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AVB Configuration Chapter 42: Audio Video Bridging (AVB)

Example

• These commands enable MSRP on Ethernet interfaces 41-43.

switch(config)#interface ethernet 41-43switch(config-if-Et41-43)#msrpswitch(config-if-Et41-43)#show activeinterface Ethernet41 speed forced 10000full msrp interface Ethernet42 speed forced 10000full msrp interface Ethernet43 speed forced 10000full msrpswitch(config-if-Et41-43)#

42.3.3 Displaying MSRP Configuration and Status

MSRP configuration information and status is displayed with the show msrp command.

Example

• This command displays the MSRP status for Ethernet interfaces 41-43.

switch(config)#show msrp interfaces ethernet 41-43

MSRP Global Status : Enabled Max Frame Size : 1522 Max Fan-In Ports : No limit

Delta Class Supported Priority Bandwidth ----- --------- -------- --------- A Y 3 75% B Y 2 0%

Legend------Adv : Talker Advertise Fail : Talker Fail AskFail : Listener Asking Failed Rdy : Listener Ready RdyFail : Listener Ready Failed

Admin Sr Talkers Listeners Bandwidth Port State Pvid Class Oper State Adv Fail Rdy AskFail Allocated ---- -------- ----- ------ --------------- ---- ----- ---- -------- --------- Et41 Active 5 A Boundary 1 0 1 0 200kbps B Core 0 0 0 1 100kbps Et42 Active 3 A Core 0 0 1 1 50kbps B WaitingForPeer 1 0 0 0 20kbps Et43 Disabled 3

switch(config)#

Stream data is available for the talker and listener. The show msrp interfaces command displays thestatus and configuration information for each stream.

Chapter 42: Audio Video Bridging (AVB) AVB Configuration

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Examples

• This command displays data for listener station streams on Ethernet interfaces 1 and 2.

switch(config)#show msrp interfaces ethernet 1-2MSRP Global Status : Enabled Max Frame Size : 1522 Max Fan-In Ports : No limit

Delta Class Supported Priority Bandwidth ----- --------- -------- --------- A Y 3 75% B Y 2 0%


ListenersPort Stream Id Dec Dir-------- -------------------- --------- ------Et1 0000.0000.0000.002a AskFail Tx 0000.0000.0000.029a RdyFail Rx 0000.0000.0000.038f AskFail RxEt2 0000.0000.0000.002a AskFail Rx 0000.0000.0000.029a RdyFail Rx 0000.0000.0000.038f AskFail Tx switch(config)#

• This command displays data for talker station streams on Ethernet interfaces 1 and 2.

switch(config)#show msrp interfaces ethernet 1-2 talkersLegend------Adv : Talker Advertise Fail : Talker Fail

Talkers Port Stream Id Dec Dir FailCode -------- -------------------- --------- ------ --------- Et1 0000.0000.0000.002a Adv Rx -- 0000.0000.0000.038f Fail Tx 7 Et2 0000.0000.0000.002a Adv Tx -- 0000.0000.0000.038f Adv Rx 7

switch(config)#

42.3.4 Enabling MVRP

MVRP is disabled by default. To enable MVRP on an interface, use the mvrp command. MVRP isenabled globally if it is enabled on at least one interface.

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AVB Configuration Chapter 42: Audio Video Bridging (AVB)

Example

• These commands enable MVRP on Ethernet interface 34.

switch(config)#interface ethernet 34switch(config-if-Et34)#mvrpswitch(config-if-Et34)#

42.3.5 Displaying MVRP Configuration and Status

MVRP configuration information and status are displayed with the show mvrp command.

Example

• This command displays the MVRP status for Ethernet interfaces 30 through 40.

switch(config)#show mvrp interfaces Ethernet 30-40

MVRP Global Status : Enabled

Port Admin State Registered Vlans Declared Vlans -------- ------------ -------------------- -------------------- Et30 Disabled Et31 Disabled Et32 Disabled Et33 Disabled Et34 Active Et35 Disabled Et36 Disabled Et37 Disabled Et38 Disabled Et39 Disabled Et40 Disabledswitch(config)#

Chapter 42: Audio Video Bridging (AVB) AVB Command Descriptions

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42.4 AVB Command DescriptionsMSRP Commands• msrp• msrp streams load-file• show msrp• show msrp interfaces• show msrp streams

MRP Commands• mrp leave-all-timer• mrp leave-timer

MVRP Commands• mvrp• show mvrp

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AVB Command Descriptions Chapter 42: Audio Video Bridging (AVB)

msrp

MSRP enables Multiple Stream Registration Protocol (MSRP), which is a signaling protocol thatprovides nodes with the ability to reserve network resources to ensure Quality of Service (QoS)between talker and listener endpoints. The Stream Reservation Protocol (SRP) utilizes MSRP toreserve bandwidth for data streams, and configure a complete path between endpoints.

The msrp command enables MSRP on the configuration mode interface. If MSRP was not previouslyenabled on any interface, the MSRP agent is launched by this command.

The no msrp and default msrp commands disable MSRP on the configuration mode interface, andremoves the corresponding msrp command from running-config. The command stops the MSRPagent when MSRP is no longer enabled on any interface.

Command ModeInterface-Ethernet Configuration

Command Syntaxmsrpno msrpdefault msrp

Example• These commands enable MSRP on Ethernet interface 3/3/3. Because it was not previously

enabled on any other interface, the command launches the MSRP agent.

switch(config)#interface ethernet 3/3/3switch(config-if-Et3/3/3)#msrpLaunching MSRP Agentswitch(config-if-Et3/3/3)#show active interface Ethernet3/3/3 msrpswitch(config-if-Et3/3/3)#

• These commands disable the MSRP agent on Ethernet interface 3/3/3. Because it is not enabledon any other interface, the command stops the MSRP agent.

switch(config-if-Et3/3/3)#no msrpStopping MSRP agentswitch(config-if-Et3/3/3)#show active interface Ethernet3/3/3switch(config-if-Et3/3/3)#msrp


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mrp leave-all-timer

The mrp leave-all-timer command specifies the mrp leave all timer interval for the configuration modeinterface.

When starting MRP, a participant starts its LeaveAll timer. Upon timer expiry, it sends a LeaveAllmessage and restarts its timer. When other participants receive the message, they register theirattributes and restart their leave-all timers.

The default leave-all timer interval is a randomly selected value from 10 to 15 seconds. Under normalconditions, this value should not be adjusted.

The no mrp leave-all-timer and default mrp leave-all-timer commands restore the default leave-alltimer interval on the configuration mode interface by removing the corresponding mrp leave-all-timercommand from running-config.


Command Syntaxmrp leave-all-timer periodno mrp leave-all-timerdefault mrp leave-all-timer

Parameters• period leave all timer interval (seconds). Values range from 10 to 60. Default value is a randomly

selected value from 10 to 15.

Example• This command sets the MRP leave-all timer interval on Ethernet interface 17 to twelve seconds.

switch(config)#interface ethernet 17switch(config-if-Et17)#mrp leave-all-timer 12switch(config-if-Et17)#

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mrp leave-timer

The leave-timer controls the deregistration of attributes. If an MRP participant needs other participantsto unregister their attributes, it sends a Leave message. When receiving a Leave message, theLeave-timer starts and unregisters the attributes if it doesn’t receive Join messages for the attributesbefore the Leave-timer expires.

The mrp leave-timer command specifies the mrp leave-timer interval for the configuration modeinterface. The default leave-timer interval is 0.6 seconds. Under normal operation conditions, this valueshould not be adjusted.

The no mrp leave-timer and default mrp leave-timer commands restore the default leave-timerinterval of 0.6 seconds on the configuration mode interface by removing the corresponding mrpleave-timer command from running-config.


Command Syntaxmrp leave-timer periodno mrp leave-timerdefault mrp leave-timer

Parameters• period leave all timer (seconds). Values range from 0.6 to 30.

Example• This command sets the MRP leave timer interval on Ethernet interface 17 to 0.8 seconds.

switch(config)#interface ethernet 17switch(config-if-Et17)#mrp leave-timer 0.8switch(config-if-Et17)#


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msrp streams load-file

The load-file for MSRP streams provides a file that contains an alias that can be substituted in the name(stream-id) of a string.

The msrp streams load-file command allows users to include a line in the file (example:0102.0304.0506 XYZW4 or 0102.0304 XYZW5) that causes the bytes to be replaced with theaccompanying string in show msrp streams commands.

The no msrp streams load-file and default msrp streams load-file commands remove the aliasassignment by removing the corresponding msrp streams load-file command from running-config.

Command ModeGlobal Configuration

Command Syntaxmsrp streams load-file [FILE TYPE]no msrp streams load-filedefault msrp streams load-file

Parameters• FILE TYPE The options include:

• certificate: device name, directory, or file name

• extension: device name, directory, or file name

• file: device name, directory, or file name

• flash: device name, directory, or file name

• ftp: device name, directory, or file name

• http: device name, directory, or file name

• https: device name, directory, or file name

• scp: device name, directory, or file name

• sftp: device name, directory, or file name

• sslkey: device name, directory, or file name

• system: device name, directory, or file name

• terminal: device name, directory, or file name

• tftp: device name, directory, or file name

• usb1: device name, directory, or file name

Example• This command indicates that the file named file1 contains the alias names that is used in MSRP

stream names.

switch(config)#msrp streams load-file file1switch(config)#

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mvrp

MVRP dynamically registers and unregisters VLANs on an interface. When an interface wishes to joina VLAN advertised by an MSRP talker (to receive a stream), MVRP sends a Join message. On receiptof the Join message, the interface is added to the VLAN. If the VLAN does not already exist, MVRPdynamically creates the VLAN and propagates it through the network.

The mvrp command enables Multiple VLAN Registration Protocol (MVRP) on the configuration modeinterface. If MVRP was not previously enabled on any interface, MVRP is also enabled globally by thiscommand.

The no mvrp and default mvrp commands disable MVRP on the configuration mode interface byremoving the corresponding mvrp command from running-config. These commands also disableMVRP globally when MVRP is no longer enabled on any interface.


Command Syntaxmvrpno mvrpdefault mvrp

Example• These commands enable MVRP on Ethernet interface 34. If MVRP was not previously enabled on

any other interface, these commands also enable MVRP globally.

switch(config)#interface ethernet 34switch(config-if-Et34)#mvrpswitch(config-if-Et34)#


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show msrp

The show msrp command displays MSRP operational information for the specified interfaces.

Command ModeEXEC

Command Syntaxshow msrp [INTERFACE_NAME]

Parameters• INTERFACE_NAME Interface type and number. Values include

• <no parameter> all Ethernet interfaces.

• interfaces ethernet e_range Ethernet interface list.

Valid e_range formats include number, range, or comma-delimited list of numbers and ranges.

Example• This command displays the MSRP status for Ethernet interfaces 41 through 43.

switch(config)#show msrp interfaces ethernet 41-43

MSRP Global Status : Enabled Max Frame Size : 1522 Max Fan-In Ports : No limit

Class Supported Priority Delta Bandwidth ----- --------- -------- --------- A Y 3 75% B Y 2 0%


Admin Sr Talkers Listeners Bandwidth Port State Pvid Class Oper State Adv Fail Rdy AskFail Allocated ---- -------- ----- ------ --------------- ---- ----- ---- -------- --------- Et41 Active 5 A Boundary 1 0 1 0 200kbps B Core 0 0 0 1 100kbps Et42 Active 3 A Core 0 0 1 1 50kbps B WaitingForPeer 1 0 0 0 20kbps Et43 Disabled 3

switch(config)#

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show msrp interfaces

The show msrp interfaces command displays station stream information for the specified station type,interfaces and streams.

Command ModeEXEC

Command Syntaxshow msrp interfaces [INTERFACE_NAME] STATION_TYPE_NAME [STREAMS]

Parameters• INTERFACE_NAME Interface type and number. Values include:


• ethernet e_range Ethernet interface list.

• STATION_TYPE Endpoint type. Values include:

• talker Command displays data for talker station streams.

• listeners Command displays data for listener station streams.

• streams Command displays data for talker and listener station streams.

• STREAMS Streams for which command displays information. Options include:

• <no parameter> all streams.

• stream-id hex_string specifies the stream command for which command displaysinformation.


Valid hex_string formats include <H>, <H.H>, <H.H.H>, or <H.H.H.H>, where H is a four-digit hexnumber that ranges from 0 to FFFF.

Example• This command displays data for listener station streams on Ethernet interfaces 1 and 2.

switch(config)#show msrp interfaces ethernet 1-2 listenersLegend------AskFail : Listener Asking Failed Rdy : Listener Ready RdyFail : Listener Ready Failed

Listeners Port Stream Id Dec Dir -------- -------------------- --------- ------ Et1 0000.0000.0000.002a AskFail Tx 0000.0000.0000.029a RdyFail Rx 0000.0000.0000.038f AskFail Rx Et2 0000.0000.0000.002a AskFail Rx 0000.0000.0000.029a RdyFail Rx 0000.0000.0000.038f AskFail Tx switch(config)#


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• This command displays data for talker station streams on Ethernet interfaces 1 and 2.

switch(config)#show msrp interfaces ethernet 1-2 talkersLegend------Adv : Talker Advertise Fail : Talker Fail

Talkers Port Stream Id Dec Dir FailCode -------- -------------------- --------- ------ --------- Et1 0000.0000.0000.002a Adv Rx -- 0000.0000.0000.038f Fail Tx 7 Et2 0000.0000.0000.002a Adv Tx -- 0000.0000.0000.038f Adv Rx 7

switch(config)#

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show msrp streams

The show msrp streams command displays configuration and status information on the specifiedMSRP streams.

Command ModeEXEC

Command Syntaxshow msrp streams [STREAM_NAME] [INFO_LEVEL]

Parameters• STREAMS Streams for which command displays information. Options include:

• <no parameter> all streams.

• stream-id hex_string specifies the stream command for which command displaysinformation.

Valid hex_string formats include <H>, <H.H>, <H.H.H>, or <H.H.H.H>, where H is a four-digit hexnumber that ranges from 0 to FFFF.

• INFO_LEVEL type of information that the command displays. Options include:

• <no parameter> command displays stream identification information.

• detail command displays identification and transmission characteristics.

• propagation command displays ingress and egress port information.

Examples• This command displays stream identification information.

switch(config)#show msrp interfaces streamsLegend------Adv : Talker Advertise Fail : Talker Fail

Stream Id DMAC Port Dec Vlan Class Bandwidth -------------------- ------------------- -------- ------ ---- ----- ---------- 0000.0000.0000.002a 00:11:22:33:44:55 Et1 Adv 24 A 8000kbps 0000.0000.0000.029a 22:33:44:55:66:77 -- -- 4095 A 0kbps 0000.0000.0000.038f 11:22:33:44:55:66 Et2 Adv 119 B 1000kbps

switch(config)#


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• This command displays stream identification and status information.

switch(config)#show msrp streams detailLegend------Adv : Talker Advertise Fail : Talker Fail

Stream Id DMAC Port Dec Vlan Class Bandwidth-------------------- ------------------- -------- ------ ---- ----- ---------- 0000.0000.0000.002a 00:11:22:33:44:55 Et1 Adv 24 A 8000kbps Latency (nsec): 800 Max Frame Size: 1522 Max Interval Frames: 2

0000.0000.0000.029a 22:33:44:55:66:77 -- -- 4095 A 0kbps Latency (nsec): 0 Max Frame Size: 1100 Max Interval Frames: 3

switch(config)#

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• This command displays stream ingress and egress port information.

switch(config)#show msrp streams propagationLegend------Adv : Talker Advertise Fail : Talker Fail AskFail : Listener Asking Failed Rdy : Listener Ready RdyFail : Listener Ready Failed

Stream Id DMAC Port Dec Vlan Class Bandwidth-------------------- ------------------- -------- ------ ---- ----- ----------0000.0000.0000.002a 00:11:22:33:44:55 Et1 Adv 24 A 8000kbps

Talker Propagation: Ingress Ingress Propagated Propagated Egress Dec Port Dec Port Dec -------- -------- ---------- ---------- -------- Adv --> Et1 --> Adv --> Et2 --> Adv Et4 --> Adv Et5 --> Adv

Listener Propagation: Egress Egress Propagated Listener Ingress Dec Port Dec Port Dec -------- -------- ---------- ---------- -------- AskFail <-- Et1 <-- AskFail <-- Et2 <-- AskFail AskFail <-- Et4 <-- AskFail AskFail <-- Et5 <-- AskFail

0000.0000.0000.029a 22:33:44:55:66:77 -- -- 4095 A 0kbps

Talker Propagation: Ingress Ingress Propagated Propagated Egress Dec Port Dec Port Dec -------- -------- ---------- ---------- --------

Listener Propagation: Egress Egress Propagated Listener Ingress Dec Port Dec Port Dec -------- -------- ---------- ---------- -------- RdyFail <-- Et1 <-- RdyFail RdyFail <-- Et2 <-- RdyFail

0000.0000.0000.038f 11:22:33:44:55:66 Et2 Adv 119 B 1000kbps

Talker Propagation: Ingress Ingress Propagated Propagated Egress Dec Port Dec Port Dec -------- -------- ---------- ---------- -------- Adv --> Et2 --> Fail --> Et1 --> Fail

Listener Propagation: Egress Egress Propagated Listener Ingress Dec Port Dec Port Dec -------- -------- ---------- ---------- -------- AskFail <-- Et2 <-- AskFail <-- Et1 <-- Rdy

switch(config)#


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show mvrp

The show mvrp command displays MVRP operational information for the specified interfaces.

Command ModeEXEC

Command Syntaxshow MVRP [INTERFACE_NAME]

Parameters• INTERFACE_NAME Interface type and number. Values include


• interfaces ethernet e_range Ethernet interface list.


Example• This command displays the MVRP status for Ethernet interfaces 30 through 40.

switch(config)#show mvrp interfaces Ethernet 30-40

MVRP Global Status : Enabled

Port Admin State Registered Vlans Declared Vlans-------- ------------ -------------------- --------------------Et30 DisabledEt31 DisabledEt32 DisabledEt33 DisabledEt34 ActiveEt35 DisabledEt36 DisabledEt37 DisabledEt38 DisabledEt39 DisabledEt40 Disabled

switch(config)#

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Audio Video Bridging (AVB) - Arista Networks · Audio Video Bridging (AVB) is a protocol set that provides precision time synchronization, admission control, queuing reservation,