Technical information

Watson-SHDSL-Router-GUI-Manual.doc
Version 2.3-03
Watson SHDSL Router
Web-based Management Manual
Revision: 2012-02-29
8-43
Using a protocol requires observing the relationship between a client and a serv-
er, in order to distinguish between the source and destination ports. For example,
let's assume you have an FTP server in your LAN, serving clients inquiring from
the WAN. You want to apply a QoS rule on incoming packets from any port on the
WAN (clients) trying to access FTP port 21 (your server), and the same for out-
going packets from port 21 trying to access any port on the WAN. Therefore, you
must set the following QoS rules:
In the 'Matching' section of 'QoS Input Rules', set the 'Protocol' drop-down menu
to: TCP Any -> 21 (available as a predefined service, named FTP).
In the 'Matching' section of 'QoS Output Rules', set the 'Protocol' drop-down
menu to: TCP 21 -> Any (must be created as a 'User Defined' service).
 DSCP Select this check box to display two DSCP fields, which enable you to
specify a hexadecimal DSCP value and its mask assigned to the packets
matching the priority rule.
 Priority Select this check box to display a drop-down menu, in which you can
select a 802.1Q priority level assigned to the packets matching the priority rule.
 Length Select this check box if you would like to specify the length of packets,
or the length of their data portion.
 VID Select this check box to if you would like to match specific S-VID (ser-
vice provider VLAN ID) and/or C-VID (customer VLAN ID
Operation Perform the following operation/s on packets that match the priority
rule.
 Set DSCP Select this check box if you would like to change the DSCP
value on packets matching the rule, prior to routing them further. The screen
will refresh, enabling you to enter the hexadecimal DSCP value in its respective
field that appears.
Figure 8-43: Set DSCP Rule
 Set Priority Select this check box if you would like to change a priority of
the packets matching the rule. The screen will refresh (see Figure 8-44), ena-
bling you to select between one of eight priority levels, zero being the lowest
and seven the highest. Each priority level is assigned a default queue number,
where Queue 0 has the lowest priority. The matching between a priority level
and a queue number can be edited in the '802.1p Settings' screen (for more in-
formation, refer to Section 8.3.6).
Figure 8-44: Set Priority with Queueing
 Set Rx Class Name For QoS input rules, packets matching the rule will be
assign to an Rx Class see Section 8.3.4.4 .
 Set Tx Class Name For QoS output rules, packets matching the rule will be
assign to a TX Class.