ZyXEL Communications XGS2210-28 User Manual page 216

Table 86 Advanced Application > Policy Rule (continued)
LABEL DESCRIPTION
Parameters
Set the fields below for this policy. You only have to set the field(s) that is related to the action(s) you configure in
the Action field.
General
Egress Port Type the number of an outgoing port.
Priority Specify a priority level.
DSCP Specify a DSCP (DiffServ Code Point) number between 0 and 63.
TOS Specify the type of service (TOS) priority level.
Metering You can configure the desired bandwidth available to a traffic flow. Traffic that exceeds the
maximum bandwidth allocated (in cases where the network is congested) is called out-of-profile
traffic.
Bandwidth Specify the bandwidth in kilobit per second (Kbps). Enter a number between 1 and 1000000.
Out-of- Specify a new DSCP number (between 0 and 63) if you want to replace or remark the DSCP
Profile DSCP
number for out-of-profile traffic.
Action
Specify the action(s) the Switch takes on the associated classified traffic flow.
Note: You can specify only one action (pair) in a policy rule. To have the Switch take multiple actions
on the same traffic flow, you need to define multiple classifiers with the same criteria and apply
different policy rules.
Say you have several classifiers that identify the same traffic flow and you specify a different policy rule for each. If
their policy actions conflict (Discard the packet, Send the packet to the egress port and Rate Limit), the Switch only
applies the policy rules with the Discard the packet and Send the packet to the egress port actions depending on
the classifier names. The longer the classifier name, the higher the classifier priority. If two classifier names are the
same length, the bigger the character, the higher the classifier priority. The lowercase letters (such as a and b)
have higher priority than the capitals (such as A and B) in the classifier name. For example, the classifier with the
name of class 2, class a or class B takes priority over the classifier with the name of class 1 or class A.
Let's say you set two classifiers (Class 1 and Class 2) and both identify all traffic from MAC address 11:22:33:44:55:66
on port 3.
If Policy 1 applies to Class 1 and the action is to drop the packets, Policy 2 applies to Class 2 and the action is to
forward the packets to the egress port, the Switch will forward the packets.
If Policy 1 applies to Class 1 and the action is to drop the packets, Policy 2 applies to Class 2 and the action is to
enable bandwidth limitation, the Switch will discard the packets immediately.
If Policy 1 applies to Class 1 and the action is to forward the packets to the egress port, Policy 2 applies to Class 2
and the action is to enable bandwidth limitation, the Switch will forward the packets.
Forwarding Select No change to forward the packets.
Select Discard the packet to drop the packets.
Select Do not drop the matching frame previously marked for dropping to retain the frames that
were marked to be dropped before.
Priority Select No change to keep the priority setting of the frames.
Select Set the packet's 802.1p priority and send the packet to priority queue to replace the
packet's 802.1p priority field with the value you set in the Priority field and put the packets in the
designated queue.
Select Replace the 802.1p priority field with the IP TOS value and send the packet to priority
queue to replace the packet's 802.1p priority field with the value you set in the TOS field and put
the packets in the designated queue.
Select Replace the 802.1p priority field with the inner 802.1p priority value and send the packet to
priority queue to replace the packet's 802.1p priority field with the existing customer priority level
carried in the frames and put the packets in the designated queue.
XGS2210 Series User's Guide
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