Enabling Qos Autoshaper - McAfee SG310 Administration Manual

Network Setup menu options
Traffic Shaping
• Enabling and configuring ToS packet priorities
• Creating a packet priority rule
• Editing a packet priority rule
• Deleting a packet priority rule

Enabling QoS Autoshaper

The Auto Traffic Shaper uses a set of built-in traffic shaping rules to attempt to ensure low latency on
interactive connections, while maintaining fast throughput on bulk transfers.
Tip: To optimize traffic shaping performance, especially when using VoIP, set the outgoing interface MTU down to
a value of 600, overriding the default (typically 1400-1500). Go to the appropriate Connections tab for the
interface to edit the MTU setting. For more information, see Connections.
From the Network Setup menu, click QoS Traffic Shaping. The QoS Autoshaper page appears
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(Figure 148).
Figure 148 QoS Traffic Autoshaper
Click the edit icon next to the network interface on which you want to enable the autoshaper. The QoS
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Autoshaper Edit page appears
Figure 149 QoS Traffic Autoshaper Edit
Select the Enable checkbox.
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Enter the downstream speed of the network connection for the interface in kilobits per second in the
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Inbound Speed list.
Note: At least one entry for either inbound or outbound speed is required.
Enter the upstream speed of the network connection for the interface in kilobits per second in the
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Outbound Speed list.
Note: If you have a PPTP or PPPoE connection to the Internet, enter approximately 80–90% of the speed that
the ISP supplied to account for protocol overheads. If you have a cable modem, DHCP, bridged, or other type
of direct IP connection to the Internet, enter values from 90-100%.
The example in
1024 = 1536 kbits inbound. 90% of 1536 is 1382 kilobits. 90% of 256 is 230 kbits.
Click Finish.
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142 McAfee UTM Firewall 4.0.4 Administration Guide
(Figure 149).
Figure 149 assumes a speed of 1.5 MB down (inbound), 256 KB up (outbound). 1.5 x