Chapter 21 Bandwidth Management

ATC assigns priority based on packet size, since time-sensitive applications such as Internet telephony (Voice over IP or VoIP) tend to have smaller packet sizes than non-time sensitive applications such as FTP (File Transfer Protocol). The following table shows some common applications, their time sensitivity, and their typical data packet sizes. Note that the figures given are merely examples - sizes may differ according to application and circumstances.

Table 117 Typical Packet Sizes

APPLICATION

TIME

TYPICAL PACKET SIZE

SENSITIVITY

(BYTES)

 

Voice over IP (SIP)

High

< 250

 

 

 

Online Gaming

High

60 ~ 90

 

 

 

Web browsing (http)

Medium

300 ~ 600

 

 

 

FTP

Low

1500

 

 

 

When ATC is activated, the device sends traffic with smaller packets before traffic with larger packets if the network is congested.

ATC assigns priority to packets as shown in the following table.

Table 118 Automatic Traffic Classifier Priorities

PACKET SIZE (BYTES)

ATC PRIORITY

1 ~ 250

ATC_High

 

 

250 ~ 1100

ATC_Medium

 

 

1100 +

ATC_Low

 

 

21.4 Subnet-based Bandwidth Management

You can create bandwidth classes based on subnets.

The following figure shows LAN subnets. You could configure one bandwidth class for subnet A and another for subnet B.

Figure 169 Subnet-based Bandwidth Management Example

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P-2602H(W)(L)-DxA User’s Guide