Allied Telesis AT-S63 - Manual (Page 251)

AT-S63 Management Software Menus Interface User’s Guide
Section I: Basic Features 251
Policy 32 Commands:
create classifier=42 description=”video flow”
ipdadddr=149.44.44.44
create qos flowgroup=36 description=”video flow”
priority=4 classifierlist=42
create qos trafficclass=21 description=”video flow”
maxbandwidth=5 flowgrouplist=36
create qos policy=32 description=”video flow”
trafficclasslist=21 ingressport=8
The parts of the policies are:
ˆ Classifiers - Specify the IP address of the node with a video
application. The classifier for Policy 17 specifies the address as a
source address since this classifier is part of a policy concerning
packets sent by the application. The classifier for Policy 32 specifies
the address as a destination address since this classifier is part of a
policy concerning packets going to the application.
ˆ Flow Groups - Specify the new priority level of 4 for the packets. As
with the previous example, the packets leave the switch with the same
priority level they had when they entered. The new priority level is
relevant only while the packets traverse the switch. To alter the packets
so that they leave containing the new level, you would change option
5, Remark Priority, to Yes.
ˆ Traffic Classes - Specify a maximum bandwidth of 5 Mbps for the
packet stream. Bandwidth assignment can only be made at the traffic
class level.
ˆ Policies - Specify the traffic class and the port where the policy is to be
assigned.
Example 3: Critical Database
Critical databases typically require a high bandwidth. They also typically
require less priority than either voice or video.
The policies in this example assign 50 Mbps bandwidth, with no change to
priority, to traffic going to and from a database. The database is located on
a node with the IP address 149.44.44.44 on port 1 of the switch.
Policy 15 Commands:
create classifier=42 description=database
ipsadddr=149.44.44.44
create qos flowgroup=36 description=database
classifierlist=42