I configure VoIP through the IPSec tunnel between PIX 520 and the router 7201. The voice User Datagram Protocol (UDP) is marked as precedence 5 when leaving the voice router. Will the PIX keep the precedence for the voice UDP traffic after leaving the Pix?
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The tunnel transform that I set up is: esp-des. It appears that the PIX does not keep the precedence for voice traffic. How do I configure the PIX to do that?