FibeAir IP-20C/S/E
User Guide
Ceragon Proprietary and Confidential
Page 478 of 597
18.3
Configuring Marking (CLI)
This section includes:
Configuring Marking Mode on a Service Point (CLI)
Marking Table for C-VLAN UP Bits (CLI)
Marking Table for S-VLAN UP Bits (CLI)
18.3.1
Marking Overview (CLI)
When enabled, IP-20’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 marking 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 mode attribute in the service point egress attributes determines
whether the frame is marked as Green or Yellow 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
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.