QoS for IP Phones

[frenaud]

We have a FortiVoice system with 6 IP phones and we experience minor audio problems (some delay, echo, etc.) Can we do QoS for the " internal" network? Phones and computers are on the same subnet, no VLANs.

[emnoc]

Yo have a host of option to enable some type of QoS. !st most congestion is at the egress into the WAN. So you need to set the priority to be high for sensitive data So you can define a traffic shaper with the aggregate voice-traffic and set the priority to be " high" e.g edit voip_phones set maximum-bandwidth 12800 set guaranteed-bandwidth 9000 set per-policy enable set priority high <------HERE end Also, you can enable diff-serv handling via the cli per fwpolicy; e.g ( under the fwpolicy ### ) set diffserv-forward enable and then set diffservcode-forward <insert the DSCP code value that you want to forward on> Than move this fwpolicy to the top of stack. This way traffic from the VoIP device, will be impacted by QoS strategies. fwiw: On earlier FortiOS version, you could enable the priority under the fwpolicy. Also don' t for get about internal QoS within the LAN. So monitor and make adjustments based on the code_type, number of callers, etc.....

[frenaud]

We don' t have IP lines, so the WAN interface shouldn' t be touched by the phones. Would the Fortigate even come into play or should I configure the QoS at the switch level?

[emnoc]

what do you mean? Are the VoIP instruments all localize? Are they connected to the internal switch ports of the fortigate ? If yes, than why ? Put them on a switch in a vlan for the VoIP devices and enable any QoS/COS for any layer2 ports.

[PetZeri]

At long last, QoS applied to remote passages can guarantee VoIP data transmission needs gets need when the Wi-Fi network ip is blocked. In the WAN, QoS is as yet fundamental, also, both to stay away from jitter-related issues and limit inertness by focusing on the treatment of VoIP parcels at WAN switches.