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Port Isolation
This page is used for enabling or disabling port isolation on ports in a Private VLAN.
A port member of a VLAN can be isolated to other isolated ports on the same VLAN and Private VLAN.
Configuration
Port Members
A check box is provided for each port of a private VLAN.
When checked, port isolation is enabled on that port.
When unchecked, port isolation is disabled on that port.
By default, port isolation is disabled on all ports.
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3.1.14 QoS
QoS is a mechanism for providing different priorities to different applications, users, or data flows, or to guarantee a
certain level of performance for a data flow.
All incoming frames are classified into a Class of Service (CoS), which is used in the queue system when the assigning
resources, in the arbitration from ingress to egress queues and in the egress scheduler when selecting the next frame for
transmission.
There is a one-to-one mapping between the terms CoS, QoS class, queue, and priority. A CoS of zero has the lowest
priority.
Bandwidth control in the queues can be done by using policers or shapers.
Apart from shapers and policers, different scheduling mechanisms can be configured based on how the different priority
queues in the QoS system are handled.
Weighted Random Early Detection (WRED) can be configured globally to avoid congestion and drop the Yellow Frames
(frames with DPL greater than zero) when the queues are filled.
The storm policers of the devices can be used at a global level to control the amount of flooded frames. It is also possible
to configure per-port storm policers.