OmniSwitch os6900 User Manual

Policy Applications Configuring QoS
page 25-74 OmniSwitch AOS Release 7 Network Configuration Guide June 2013
Policy Applications
Policies are used to classify incoming flows and treat the relevant outgoing flows. There are many ways to
classify the traffic and many ways to apply QoS parameters to the traffic.
Classifying traffic can be as simple as identifying a Layer 2 or Layer 3 address of an incoming flow. Treat-
ing the traffic might involve prioritizing the traffic or rewriting an IP address. How the traffic is treated
(the action in the policy rule) typically defines the type of policy:
This section describes how to configure basic QoS policies and 802.1p/ToS/DSCP marking and mapping
policies. Policies used for Layer 2 and Layer 3/4 filters, are commonly referred to as Access Control Lists
(ACLs). Filtering is discussed in Chapter 25, “Configuring QoS.”
Policies can also be used for prioritizing traffic in dynamic link aggregation groups. For more information
about dynamic link aggregates, see Chapter 8, “Configuring Dynamic Link Aggregation.”
Basic QoS Policies
Traffic prioritization and bandwidth policing can be the most common types of QoS policies. For these
policies, any condition can be created; the policy action indicates how the traffic must be prioritized or
how the bandwidth must be shaped.
Note. If multiple addresses, services, or ports must be given the same priority, use a policy condition
group to specify the group and associate the group with the condition. See “Using Condition Groups in
Policies” on page 25-53 for more information about groups.
Type of Policy Description Action Parameters Used
Basic QoS policies Prioritizes and polices particular
flows.
maximum bandwidth
maximum depth
priority
cir cbs pir pbs
Redirection policies Redirects flows to a specific port
or link aggregate ID.
redirect port
redirect linkagg
Policy Based Mirroring Mirrors ingress and egress pack-
ets to a specific port.
ingress mirror
egress mirror
ingress egress mirror
ICMP policies Filters, prioritizes, and/or rate
limits ICMP traffic
disposition
priority
maximum bandwidth
802.1p, ToS, and DSCP tagging or
mapping policies
Sets or resets the egress 802.1p,
ToS, or DSCP values
802.1p
tos
dscp
map group
Policy Based Routing (PBR) Redirects routed traffic. permanent ip
Access Control Lists (ACLs) Groups of policies rules used for
filtering traffic (allow/deny)
disposition

OmniSwitch os6900 Specifications

General

Brand	OmniSwitch
Model	os6900
Category	Switch
Language	English