Differentiated services (diffserv) – NETGEAR M4350-24F4V 24-Port 10G SFP+ Managed AV Network Switch User Manual
Page 915
6. On the IP Binding Configuration page, assign ACL ID 1 to ports 2, 3, and 4, and
assign a sequence number of 1. (See Configure IP ACL interface bindings on page
829.)
By default, this IP ACL is bound on the inbound direction, so it examines traffic as it
enters the switch.
7. Click the Apply button.
8. On the IP Binding Table page, you can view the interfaces and IP ACL binding
information. (See Display or delete IP ACL bindings in the IP ACL binding table on
page 831.)
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 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 an explicit
deny all
rule exists 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 does. 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 can negatively affect applications with strict timing
requirements, such as voice or multimedia.
Quality of Service (QoS) can provide consistent, predictable data delivery by
distinguishing between packets with strict timing requirements and 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 cannot 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 supports DiffServ.
Main User Manual
915
Configuration Examples
Fully Managed Switches M4350 Series Main User Manual