Installation Guide

Table Of Contents
Task 2: Configuring IP and Ethernet interfaces PMP 450i and PTP 450i Configuration and User
Guide
VLAN Remarking and Priority bits configuration
VLAN Remarking
VLAN Remarking feature allows the user to change the VLAN ID and priority of both
upstream and downstream packets at the Ethernet Interface. The remarking
configuration is available for:
1. VLAN ID re-marking
2. 802.1p priority re-marking
For Q-in-Q VLAN tagged frame, re-marking is performed on the
outer tag.
VLAN ID Remarking
SM supports the ability to re-mark the VLAN ID on both upstream and downstream VLAN
frames at the Ethernet interface. For instance, a configuration can be added to re-mark
VLAN ID ‘x’ to VLAN ID ‘y’ as shown in Table 14. AP does not support VLAN ID
remarking.
Table 14 VLAN Remarking Example
VLAN frame direction
Remarking
Upstream
SM receives VLAN ID ‘x’ frame at the Ethernet interface,
checks the configuration and re-marks to VLAN ID ‘y’. So
VLAN ID ‘y’ frame comes out of AP’s Ethernet interface.
When SM re-marks, a dynamic entry in VLAN membership
table for ‘y’ is added to allow reception of VLAN ID ‘y’
Downstream
AP receives VLAN ID ‘y’ frame at the Ethernet interface and
sends to SM. SM accepts the frame as it has an entry in the
membership table and re-marks to VLAN ID ‘x’. This reverse
re- marking is necessary because the downstream devices do
not know of re-marking and are expecting VLAN ‘x’ frames.
802.1P Remarking
AP and SM allow re-marking of 802.1p priority bits for the frames received at the Ethernet
interface. Priority bits are not re-marked for the packets sent out of Ethernet interface
(reverse direction).
Configuration must be added at SM for upstream frames and at AP for downstream frames.
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