ZyXEL Communications ZyWALL USG-Series - Scenario 8 - Reserving Highest Bandwidth Management Priority for Voip Traffic; Application Scenario; Configuration Guide

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Scenario 8 — Reserving Highest Bandwidth Management Priority for VoIP traffic
8.1 Application Scenario
In an enterprise network, there are various types of traffic. But the company Internet connection bandwidth is
limited to a specific value. All this traffic will contend to use the limited bandwidth, which may result in some
important traffic, for example, VoIP traffic getting slow or even starved. Therefore, intelligent bandwidth
management for improved productivity becomes a matter of high concern for network administrators. ZyXEL
USG provides Bandwidth Management (BWM) function to effectively manage bandwidth according to different
flexible criteria.
VoIP traffic is quite sensitive to delay and jitter. Therefore, in an enterprise company, VoIP traffic should usually
be awarded the highest priority over all other types of traffic.
8.2 Configuration Guide
Step 1. Go to Configuration > Network > ALG, enable SIP ALG.
Step 2. Go to Configuration > BWM > enable BWM and enable Highest Bandwidth Priority for SIP Traffic >
Apply.
Enabling Highest Bandwidth Priority for SIP Traffic forces the device to give SIP traffic the highest bandwidth