Prioritizing SIP Traffic

[Daniel_Herbon]

Hello, Forgive me if this is posted elsewhere, I' ve searched for a topic relating to this but perhaps I' m using the wrong search terms. I' m looking for a way to prioritize SIP trafffic (port 5060). I need to guarantee that SIP traffic at one of my Branch offices going to the PBX Server gets priority over everything else leaving the office. We' re starting to notice a decrease in performance and I want to make sure users internet browsing doesn' t get priority over phone calls. Thanks ahead of time.

[abelio]

Hi, try to elaborate a bit your question mentioning FTG box, firmware version, topology, available bandwidth, etc. There' re a lot of news in 4.x fortios regarding SIP. You could check this http://kb.fortinet.com/kb/microsites/search.do?cmd=displayKC&docType=kc&externalId=FD31530 And for priorizing traffic, traffic shapper is the answer; different firmware versions (3.x, 4.x) manages this in very different way. regards

[emnoc]

You might want to ensure the voice bearer channel is also prioritize, so whatever port-range that the VoIP voice traffic uses, setup some strict traffic shaping. I use the traffic shaper on my firewalls to set the min-max guranteed bandwidth and also set the priority queue to high. With g711, I' m budgeting 84.5kbps of traffic per sustained call.

[lmuir]

Remember by default any policies which do not have a traffic shaper applied is placed in the high priority queue. So either add traffic shaping to all policies or set the global default to medium. Cheers.

[emnoc]

It' s actullay placed in queue 0, but overall QoS depends on TOS value and what' s configured in the firewall policy which has it' s own low/med/high value. By ordering the FW policies you have numerous way to adjust for QoS. and lastly, I place all TS fwpolices ahead of any generic non-TS fwpolicies, just for this reason. Voice quality is exceptionally clear over my WAN uplinks