ZyXEL Communications MSC1000G Series, Руководство пользователя

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Chapter 11 Profile Screens
Management Switch Card User’s Guide
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• Switch Queues : This column represents the mapping between IEEE 802.1p priorities and the
MSC’s physical queues. You can configure this mapping, although it is highly recommended to
use the default mapping.
• IPQoS Profile with 1 Queue ~ IPQoS Profile with 8 Queues : The IPQoS profile
configuration determines how many of the VDSL port’s queues to use and how to use them. This
table’s mapping between the
Switch Queues and the IPQoS Profile columns determines to
which VDSL port queue a frame is sent. This is not configurable.
Note: It is highly recommended to use the default IEEE 802.1p to switch queues mapping
and IPQoS profiles with 8 queues.
Changing the IEEE 802.1p to switch queue mapping may result in unexpected queuing behavior.
This is because even if you change the mapping between the IEEE 802.1p priorities and the switch
queues, the system still uses the same mapping between the switch queues and the IPQoS profile
queues. See
Section 11.23.5 on page 401 for some examples of what can happen when you do not
use the default IEEE 802.1p to switch queue mapping.
11.23.3 IPQoS for VDSL 2 and ADSL2+ to VDSL2 Migration Examples
These examples are compatible with both VDSL2 and ADSL2+. This makes them useful in case the
line needs to fall back to ADSL2+ or some subscribers still have ADSL2+ devices and you want to
migrate them to VDSL2 later.
11.23.3.1 VDSL Mode: 1 PVC with 8 Queues Example
This example configures a very simple IPQoS profile and applies it to a VDSL port. This IPQoS
profile is also compatible with ADSL2+. The IPQoS profile uses 8 traffic queues with a single PVC.
Each traffic queue uses the default priority level (the same as the queue ID). This results in 8 queue
priority levels and a 1:1 mapping from the 8 IEEE 801.1p priorities.