Инструкция для ZYXEL GS1920-48

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Chapter 21 Policy Rule

GS1920 Series User’s Guide

160

Bandwidth

Specify the bandwidth in kilobit per second (Kbps). Enter a number between 64 and
1000000.

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 foward 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 foward 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.

Priority

Select No change to keep the priority setting of the frames.

Select Set the packet’s 802.1 priority to replace the packet’s 802.1 priority field with the
value you set in the Priority field.

Outgoing

Select Send the packet to the egress port to send the packet to the egress port.

Select Set the packet's VLAN ID to replace the VLAN ID of the packets with the value you
configure in the VLAN ID field.

Rate Limit

Select Enable to activate bandwidth limitation on the traffic flow(s).

Add

Click Add to inset the entry to the summary table below and save your changes to the
Switch’s run-time memory. The Switch loses these changes if it is turned off or loses power,
so use the Save link on the top navigation panel to save your changes to the non-volatile
memory when you are done configuring.

Cancel

Click Cancel to reset the fields back to your previous configuration.

Clear

Click Clear to set the above fields back to the factory defaults.

Index

This field displays the policy index number. Click an index number to edit the policy.

Active

This field displays Yes when policy is activated and No when is it deactivated.

Name

This field displays the name you have assigned to this policy.

Classifier(s)

This field displays the name(s) of the classifier to which this policy applies.