LevelOne GSW-0890 Switch User Manual

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Function name:

IP TCP/UDP Port Classification

Function description:

In L4 QoS Configuration, you can enter one of these special network

transmission events, for example we use” Down prioritize web browsing,

e-mail, FTP and news “L4 QoS Configuration and click <Apply> button, and

then click <Advance >>>

button. We can find Special TCP/UDP port 80, 280,

443, 25, 110, 20, 21, 69, 119, 2009 have already existed and defined for your

using but it is fine that you modify this pre-defined TCP/UDP port with other

port number you prefer. In ” Down prioritize web browsing, e-mail, FTP and

news “ L4 QoS Configuration with default setting, special defined TCP/UDP

port possesses lower QoS traffic than Default class ( all other TCP/UDP ports

such as port 81,82,83,84,85, etc.). Giving an example, when we transmit TCP

packets with port number 80 at each of port 2 and port number 81 at port 3 to

port 1 until the congestion happens. The packets from port 3 will be dropped

by port 1 because the TCP packets have port number 80 is high priority and

will have higher precedence to be sent out from port 1.

Parameter description:

Disable IP TCP/UDP Port Classification:

Belong to the QoS in L4. Just tick the option button and press <Apply>