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Chapter 7: Quality of Service (QoS)
Configuring Marking
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Page 7-21
Configuring Marking
This section includes:
•
•
•
Modifying the 802.1Q Marking Table
•
Modifying the 802.1AD Marking Table
Marking Overview
When enabled, PTP 820G and PTP 820F
's marking mechanism modifies each frame’s 802.1p UP bit and CFI/DEI
bits according to the classifier decision. The CFI/DEI (color) field is modified according to the classifier and policer
decision. The color is first determined by a classifier and may be later overwritten by a policer. Green color is
represented by a CFI/DEI value of 0, and Yellow color is represented by a CFI/DEI value of 1. Marking is performed
on egress frames that are VLAN-tagged.
The marking is performed according to global mapping tables that describe the 802.1p UP bits and the CFI bits (for
C-VLAN tags) or DEI bits (for S VLAN tags). The marking bit in the service point egress attributes determines
whether the frame is marked as green or according to the calculated color.
Note
The calculated color is sent to the queue manager regardless of whether the marking bit is set.
Regular marking is only performed when:
•
The outer frame is S-VLAN, and S-VLAN CoS preservation is disabled, or
•
The outer frame is C-VLAN, and C-VLAN CoS preservation is disabled.
If marking and CoS preservation for the relevant outer VLAN are both disabled, special marking is applied. Special
marking means that marking is performed, but only according to the values defined for Green frames in the
802.1Q and 802.1AD marking tables.
When marking is performed, the C-VLAN or S-VLAN 802.1p UP bits are re-marked according to the calculated CoS
and color, and the mapping table for C-VLAN or S-VLAN.
Enabling Marking
Marking is enabled and disabled on the service point level. See
Modifying the 802.1Q Marking Table
The 802.1Q Marking table enables you to modify the CoS to UP and CFI bit mapping that is implemented when
marking is enabled.
Summary of Contents for PTP 820 Series
Page 1: ...User Guide ...
Page 49: ...Chapter 1 Introduction Configuration Tips phn 3965_006v002 Page 1 3 ...
Page 162: ...Chapter 3 Configuration Guide System Configurations phn 3965_006v002 Page 3 4 ...
Page 294: ...Chapter 4 Unit Management Upgrading the Software phn 3965_006v002 Page 4 19 5 Select FTP ...
Page 713: ...Chapter 14 Getting Started CLI Configuring the Activation Key CLI phn 3965_006v002 Page 14 18 ...
Page 731: ...Chapter 14 Getting Started CLI Operating in FIPS Mode CLI phn 3965_006v002 Page 14 36 ...