FibeAir IP-20C/S/E
User Guide
Ceragon Proprietary and Confidential
Page 199 of 597
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.
For example, if the frame is an untagged IP Ethernet frame, a match will not be
found until the third priority level (DSCP). The CoS and Color values defined
for the frame’s DSCP value will be applied to the frame.
You can disable some of these classification methods by configuring them as
un-trusted. For example, if 802.1p classification is configured as un-trusted for
a specific interface, the classification mechanism does not perform
classification by UP bits. This is useful, for example, if classification is based on
DSCP priority bits.
If no match is found at the logical interface level, the default CoS is applied to
incoming frames at this level. In this case, the Color of the frame is assumed to
be Green.
7.2.2
Configuring Ingress Path Classification on a Logical Interface
This section explains how to configure the classification criteria per each
logical interface. The following sections explain how to modify the
classification tables per bit type.
To configure the classification criteria for a logical interface:
1 Select Ethernet > Interfaces > Logical Interfaces. The Logical Interfaces
page opens.
Figure 140: Logical Interfaces Page
