FortiSwitch QoS Configuration for Audinate Dante devices (PTP and Audio)

[htopcu]

Hello all, I am currently preparing QoS for a Dante audio network for some FortiSwitches managed by Fortigate / FortiLink.

Dante needs at least priority for PTP (CS7, high) and Audio (EF, medium), and optional for other reserved traffic (CS1, low) according to following documentation:

www.getdante.com/support/faq/how-does-dante-use-dscp-diffserv-priority-values-when-configuring-qos/

As far as I understood the Fortiswitch QoS concept, it should be sufficient to map the different DSCP values to different queue-numbers according to their priority (higher priority, higher queue) and to use the default "strict" scheduling, so that higher queues (e.g. the queue for PTP) are always serviced first.

DSCP Mapping:

CS1 to cos-queue 1 (reserved)

EF to cos-queue 5 (audio)

CS7 to cos-queue 6 (PTP)

QoS Policy

strict scheduling for all above named queues

Port configuration

Map the QoS policy to all uplink-ports

Trust DSCP map on all Dante endpoint access ports

Would you recommend this configuration or do you have a better suggestion?

I read, that queue 7 should not be used for "data traffic", because it is used for network control and management traffic. But woud it suitable, to also map the CS7 for PTP to that queue because of its criticality?

"FortiSwitch uses “queue-7” for network control and critical management traffic. To avoid affecting critical network control and management traffic, do not oversubscribe queue-7 or avoid using queue-7 for data traffic when configuring QoS."

docs.fortinet.com/document/fortiswitch/7.2.8/administration-guide/609011/configuring-fortiswitch-qos

Thank you in advance

Best regards

[Anthony_E]

Hello,

Thank you for using the Community Forum. I will seek to get you an answer or help. We will reply to this thread with an update as soon as possible.

Thanks,

[Anthony_E]

Hello,

We are still looking for someone to help you.

We will come back to you ASAP.

Regards,

[riteshpv · Accepted solution]

Hi,

As mentioned in guide Queue-7 is used for network and critical management traffic. If the FSW is managed then your Fortilink would get affected. I would suggest avoid using that specific queue.

Understanding control traffic, refer link: QOS queue for control traffic on FortiSwitch

An example for voice traffic put in queue-5 mentioned in below link: QoS for voice on managed FortiSwitch

Note: FortiSwitchOS supports only PTP version 2.  Refer below link to the guide: PTP 

If you still see issue then kindly open ticket with TAC with FSW serial no for further investigation.

Regards,
Ritesh P V

[htopcu]

Hi Ritesh,

thank you for clarification.

Regards, Hakan

[Anthony_E]

Thank you Ritesh!