NETGEAR XS728T ProSAFE - Differentiated Services (DiffServ)

Configuration Examples
190
XS728T ProSAFE 28-Port 10-Gigabit L2+ Smart Switch
• Action. Permit
• Match Every. True
5. Click Add.
6. In the IP Binding Configuration screen, assign ACL ID 1 to the Ethernet ports 2, 3, and 4,
and assign a sequence number of 1.
For more information, see IP Binding Configuration on page 158.
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.
For more information, see IP Binding Table on page 159.
The IP ACL in this example matches all packets with the source IP address and subnet mask
of the Finance department network and denies 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 delivers the data in a timely fashion, although there is
no guarantee that it will. During times of congestion, packets might be delayed, sent
sporadically, or dropped. For typical Internet applications, such as email 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. For this reason, 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.
The switch support DiffServ.