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Daniel_Herbon
Daniel_Herbon
New Member
May 26, 2010
Question

Prioritizing SIP Traffic

  • May 26, 2010
  • 4 replies
  • 4341 views
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.

    4 replies

    abelio
    SuperUser
    abelio
    SuperUser
    May 27, 2010
    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
    emnoc
    New Member
    May 27, 2010
    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
    lmuir
    New Member
    May 28, 2010
    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
    emnoc
    New Member
    May 28, 2010
    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
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