ZyXEL Communications P8802T, User Manual

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Chapter 4 WAN
Basic Home Station VDSL2 P8802T User’s Guide
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4.3 The Layer-2 Interface PTM Screen
The VDSL Router must have a layer-2 interface to allow users to use the DSL port to access the
Internet. The screen varies depending on the interface type you select. Log into the VDSL Router’s
web configurator and click Advanced Setup > Layer2 Interface > PTM Interface to manage
the PTM layer-2 interfaces.
Note: The ATM and PTM layer-2 interfaces cannot work at the same time.
Figure 18
Layer-2 Interface: PTM
Scheduler Select the scheduler to use for queues that have the same precedence as the default
queue. Queuing applies only when a port has more traffic than it can handle.
Weighted Round Robin scheduling services queues of the same priority level on a
rotating basis based on their queue weight. The higher a queue’s weight, the more
service it gets. This queuing mechanism divides any available bandwidth across the
different traffic queues and returns to queues that have not yet emptied.
Weighted Fair Queuing guarantees each queue's minimum bandwidth based on its
queue weight during traffic congestion. This queuing mechanism divides any available
bandwidth across the different traffic queues. Weighted fair queuing handles packets of
various sizes better than weighted round robin queuing does.
Default Queue
Weight Specify the VC’s weight for weighed fair queuing. The higher the weight, the bigger
portion of the bandwidth the VC gets.
Default Queue
Precedence Specify the VC’s priority for weighed fair queuing. The smaller the number the higher
the priority.
VC WRR Weight Specify the VC’s weight for weighted round robin queuing. The higher the weight, the
bigger portion of the bandwidth the VC gets.
VC Precedence Specify the VC’s priority for weighted round robin queuing. The smaller the number the
higher the priority.
Back Click this button to return to the previous screen without saving any changes.
Apply/Save Click this button to save your changes and go back to the previous screen.
Table 14
Layer-2 ATM Interface Configuration (continued)
LABEL DESCRIPTION