Technical information

Watson-SHDSL-Router-GUI-Manual.doc
Version 2.3-03
Watson SHDSL Router
Web-based Management Manual
Revision: 2012-02-29
8-39
In this example, the application "Domain Name Server" is running on computer
192.168.2.1, using UDP protocol on port 53. This screen provides a combined ap-
plication and computer view, and enables you to select the general traffic priorities
for that computer.
8.3.2.2 Computer View
The "By Computer" tab presents a table displaying the sum of bandwidth used by
each LAN computer. The fields displayed are the computer's IP address and the Tx
and Rx throughput.
Figure 8-40: Internet Connection Utilization by Computer
Click a computer's IP address to view the bandwidth-consuming applications run-
ning on that computer.
8.3.3 Traffic Priority
Traffic Priority allows you to manage and avoid traffic congestion by defining in-
bound and outbound priority rules for each device on your gateway. These rules
determine the priority that packets, traveling through the device, will receive. QoS
parameters (DSCP marking and packet priority) are set per packet, on an applica-
tion basis. You can set QoS parameters using flexible rules, according to the fol-
lowing parameters:
 Source/destination IP address, MAC address or host name
 Device
 Source/destination ports
 Limit the rule for specific days and hours
Watson supports two priority marking methods for packet prioritization:
 DSCP (refer to Section 8.3.5).
 802.1p Priority (refer to Section 8.3.6).
The matching of packets by rules is connection-based, known as Stateful Packet
Inspection (SPI), using the same connection-tracking mechanism used by Wat-
son's firewall. Once a packet matches a rule, all subsequent packets with the same
attributes receive the same QoS parameters, both inbound and outbound. A packet
can match more than one rule. Therefore:
 The first class rule has precedence over all other class rules (scanning is
stopped once the first rule is reached).