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A communications network transports a multitude of applications and data, including
high-quality video and delay-sensitive data such as real-time voice. Networks must provide
secure, predictable, measurable, and sometimes guaranteed services.
Achieving the required QoS becomes the secret to a successful end-to-end business solution.
Therefore, QoS is the set of techniques to manage network resources.
There are 4 web-pages associated with the QoS configuration:
QoS|QoS Control List: The web page shows the QCEs in a prioritized way, highest (top) to
lowest (bottom). Default the table is empty. An ingress frame will only get a hit on one QCE
even though there are more matching QCEs. The first matching QCE will give that frame a
priority: Low, Normal, Medium or High. 5 different QCLs can be created, each with 8
different QCEs. You assign each port a QCL id under QoS|Ports page. The QoS counters can
be viewed under Monitor|Ports|QoS statistics. There are number of parameters that can be
configured with a QCE. Read the Web page help text to get further information for each of
them.
QoS|Ports: The Ports QoS page is used to assign a QCL id to an ingress port. Furthermore you
can assign a default class to a port and a queuing mode. Strict queuing means that the higher
priority frame will always be served before a lower priority frame. Weighted priority will give
each class some weight of the bandwidth.
QoS|Rate Limiters: Under this page you can configure the policer (ingress) and shaper (egress)
rate for each port. See the help page for details.
QoS|Storm Control: Here you can limit the flooding in the switch, i.e. the rate you choose
applies to the whole switch. Choose the mix of Unicast, Multicast and Broadcast storm control.
See the help page for details.
R
RARP
RARP
is an acronym for Reverse Address Resolution Protocol. It is a protocol that is used to
obtain an IP address for a given hardware address, such as an Ethernet address. RARP is the
complement of arp.
RADIUS
RADIUS
is an acronym for Remote Authentication Dial In User Service. It is a networking
protocol that provides centralized access, authorization and accounting management for
people or computers to connect and use a network service.
RDI
RDI
is an acronym for Remote Defect Indication. It is a
MEP
to indicate defect detected to the remote peer MEP
Router Port
A router port is a port on the Ethernet switch that leads switch towards the Layer 3 multicast
OAM
-141-
functionality that is used by a
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