Reference Guide

ingress policy actions include 802.1p or DSCP marking, rate-limiting (policing), enable honoring of 802.1p (CoS), or honoring of DSCP eld
of incoming packets.
The policy actions executed for egress trac are called egress policy actions. Allowed egress policy actions include scheduling, rate-
shaping, and WRED. You can dene policies for a set of trac classes with actions to be taken for each class. QoS-type policy-maps dene
policies for trac classes created by the QoS-type class-maps. You can apply ingress policy actions only on QoS-type of policies.
Queuing-type policy-maps dene policies for trac classes created by queuing-type class-maps. You can apply egress policy actions only
on queuing-type of policies. Apply egress policy actions only on queuing-type of policies (see Policy-map conguration).
Control-plane type policy-maps dene policies for trac classes created by control-plane type class-maps. You can apply control-plane
policy actions only on control-plane type of policies. In this release, the only available control-plane policy action is rate-limiting.
Apply policy
Once the policy is dened, you must apply the policy in CONTROL-PLANE mode to activate it. Policies dened for data trac can apply in
ingress or egress direction on an interface or on all interfaces. This policy can be applied in SYSTEM-QOS mode.
Apply ingress policy actions (qos-type policy) to ingress interfaces in SYSTEM-QOS mode, or apply egress policy actions (queuing-type
policy) to egress interfaces in SYSTEM-QOS mode.
Congure quality of service
Network trac is processed based on classication and policies that are created and applied to the trac.
Conguring QoS is a three-step process:
1 Create trac classes based on the classication.
2 Create QoS policies and dene actions to take for trac classes.
3 Apply the QoS policies to interface (port), system (all interfaces), or control-plane trac.
SYSTEM QOS or CONTROL-PLANE policies are special conguration modes, similar to INTERFACE modes. Any QoS command in
SYSTEM QOS mode is applicable to all interfaces, and any command in CONTROL-PLANE mode is applicable to the CONTROL-PLANE
trac.
If the system has both Layer 2 (L2) and Layer 3 (L3) interfaces, you can apply an L2 policy-map only to an L2 interface. You can also apply
an L3 policy-map only to an L3 interface if the system has both L2 and L3 interfaces.
Quality of service
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