One Way Audio

[nitesh_saxena]

Dear All,

We have a very strange issue which is happening for one way audio for the voice.

We have done the default configuration disable sip and nat trace globally and session helpers.

Now we did some testing:-

Scenario 1:-

Port :- Access 10 Voice Vlan 20 --> IP Phone doesnt work and there is one way audio

Scenario 2:-

Port:- Access Vlan 20 (assigned voice vlan) --> IP Phone works and there is no issue.

we are not changing any configuration or access list other port configuration.

We are not able to understand by this is happening only when we are tagging it with voice vlan rather than access vlan.

Can someone shed some light on this.

[Mrinmoy]

Have you checked this?

https://community.fortinet.com/t5/FortiGate/Troubleshooting-Tip-One-way-Audio-issue-in-VOIP-with-SIP...

[sjoshi]

Dear nitesh_saxena

Thank you for posting to the Fortinet Community Forum.

Problem Description:-

One Way Audio

Please share the pcap while initiating the call during the issue scenario.

diag sniff packet any 'host <voip_srv> and host <voip client>' 6 0 l

let me know if the SIP server and RTP server is same.

Let us know if this helps.

- Have you found a solution? Then give your helper a "Kudos" and mark the solution.

Thanks

[sjoshi]

Please share the pcap while initiating the call during the issue scenario.

[sjoshi]

diag sniff packet any 'host <voip_srv> and host <voip client>' 6 0 l

[sjoshi]

let me know if the SIP server and RTP server is same.