Siemens S223 - Manual (Page 139)

User Manual UMN:CLI
SURPASS hiD 6615 S223/S323 R1.5
A50010-Y3-C150-2-7619 139
7.6 Rule and QoS
The hiD 6615 S223/S323 provides rule and QoS feature for traffic management. The rule
classifies incoming traffic, and then processes the traffic according to user-defined poli-
cies. You can use the physical port, 802.1p priority (CoS), VLAN ID, DSCP, and so on to
classify incoming packets.
You can configure the policy in order to change some data fields within a packet or to re-
lay packets to a mirror monitor by a “Rule” function. QoS (Quality of Service) is one of
useful functions to provide the more convenient service of network traffic for users. It is
very serviceable to prevent overloading and delaying or failing of sending traffic by giving
priority to traffic.
By the way, you need to be careful for other traffics not to be failed by the traffic config-
ured as priority by user. QoS can give a priority to a specific traffic by basically offering
the priority to the traffic or limiting the others. When processing data, data are usually
supposed to be processed in time-order like first in, first out.
This way, not processing specific data first, might lose all data in case of overloading traf-
fics. However, in case of overloading traffics QoS can apply processing order to traffic by
reorganizing priorities according to its importance. By favor of QoS, you can predict net-
work performance in advance and manage bandwidth more effectively.
7.6.1 How to Operate Rule and QoS
For the hiD 6615 S223/S323, rules operate as follows.
• Rule Creation
To classify the packets according to the specific basis, configure the policies about
them first. The basis used to classify the packets is 802.1p priority (CoS), VLAN ID,
DSCP and port number. Additionally, a unique name needs to be assigned to each
rule.
• Rule Priority
Assigns a priority to a rule (precedence to other rules).
• Packet Classification
Configures the policy to adjust how and what is to be classified within transmitted
packets.
• Rule Match
Configures the policy classifying the action(s) to be performed if the configured rule
classification fits transmitted packet(s).
–
mirror transmits the classified traffic to monitor port.
– redirect transmits the classified traffic to specified port.
– permit allows traffic matching given characteristics.
– deny blocks traffic matching given characteristics.
• Rule Apply
Applies the just configured rule. Configured values will be checked and the rule be-
comes activated within the system.
An already applied rule can not be modified. It needs to be deleted and then created
again with changed values.
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