Ceragon FibeAir IP-20 All-Outdoor Series, User Manual

Page: 298 / 825

User Guide for FibeAir® IP-20 All-Outdoor Products, CeraOS 10.5
Page 298 of 825
Ceragon Proprietary and Confidential
7.2 Configuring Classification
The hierarchical classifier consists of the following levels:
•
Logical interface-level classification
• Service point-level classification
• Service level classification
This section explains how to configure classification at the logical interface level.
•
For instructions how to configure classification at the service point level, see
Ethernet Service Points – Ingress Attributes .
•
For instructions how to configure classification at the service level, see Adding
an Ethernet Service .
This section includes:
• Classification Overview
• Configuring Ingress Path Classification on a Logical Interface
•
Modifying the C-VLAN 802.1Q UP and CFI Bit Classification Table
• Modifying the S-VLAN 802.1 UP and DEI Bit Classification Table
• Modifying the DSCP Classification Table
•
Modifying the MPLS EXP Bit Classification Table
In addition to the procedures described in this section, you can specify a specific
CoS and Color for a specific VLAN ID. This is the highest classification priority on
the logical interface level, and overrides any other classification criteria at the
logical interface level. Classification by VLAN ID can only be configured via CLI. See
Configuring VLAN Classification and Override (CLI) .
7.2.1 Classification Overview
IP-20 supports a hierarchical classification mechanism. The classification
mechanism examines incoming frames and determines their CoS and Color. The
benefit of hierarchical classifi
cation is that it provides the ability to “zoom in” or
“zoom out”, enabling classification at higher or lower levels of the hierarchy. The
nature of each traffic stream defines which level of the hierarchical classifier to
apply, or whether to use several levels of the classification hierarchy in parallel.
Classification takes place on the logical interface level according to the following
priorities:
◦
VLAN ID (CLI-only – see Configuring VLAN Classification and Override (CLI) )
◦
802.1p bits
◦
DSCP bits
◦
MPLS EXP field
◦
Default interface CoS
IP-20 performs the classification on each frame ingressing the system via the
logical interface. Classification is performed step by step from the highest priority
to the lowest priority classification method. Once a match is found, the classifier
determines the CoS and Color decision for the frame for the logical interface-level.