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Netgear GS108Tv2 Manual

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GS108T and GS110TP Smart Switch Software Administration Manual
Configuration Examples B-7
v1.0, April 2010
6. From the IP Binding Configuration page, assign ACL ID 1 to the interface gigabit ports 2, 3,
and 4, and assign a sequence number of 1 (See
“IP Binding Configuration” on page 5-58).
By default, this IP ACL is bound on the inbound direction, so it examines traffic as it enters
the switch.
7. Click Apply.
8. Use the IP Binding Table screen to view the interfaces and IP ACL binding information (See
“IP Binding Table” on page 5-59).
The IP ACL in this example matches all packets with the source IP address and subnet mask of the
Finance department's network and deny it on the Ethernet interfaces 2, 3, and 4 of the switch. The
second rule permits all non-Finance traffic on the ports. The second rule is required because there
is an explicit deny all rule as the lowest priority rule.
Differentiated Services (DiffServ)
Standard IP-based networks are designed to provide best effort data delivery service. Best effort
service implies that the network deliver the data in a timely fashion, although there is no guarantee
that it will. During times of congestion, packets may be delayed, sent sporadically, or dropped. For
typical Internet applications, such as e-mail and file transfer, a slight degradation in service is
acceptable and in many cases unnoticeable. However, any degradation of service has undesirable
effects on applications with strict timing requirements, such as voice or multimedia.
Quality of Service (QoS) can provide consistent, predictable data delivery by distinguishing
between packets that have strict timing requirements from those that are more tolerant of delay.
Packets with strict timing requirements are given special treatment in a QoS-capable network.
With this in mind, all elements of the network must be QoS-capable. If one node is unable to meet
the necessary timing requirements, this creates a deficiency in the network path and the
performance of the entire packet flow is compromised.
There are two basic types of QoS:
• Integrated Services: network resources are apportioned based on request and are reserved
(resource reservation) according to network management policy (RSVP, for example).
• Differentiated Services: network resources are apportioned based on traffic classification and
priority, giving preferential treatment to data with strict timing requirements.
GS108T and GS110TP switches support DiffServ.
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