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 trac are called egress policy actions. Allowed egress policy actions include scheduling, rate-
shaping, and WRED. You can dene policies for a set of trac classes with actions to be taken for each class. QoS-type policy-maps dene
policies for trac classes created by the QoS-type class-maps. You can apply ingress policy actions only on QoS-type of policies.
Queuing-type policy-maps dene policies for trac 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 conguration).
Control-plane type policy-maps dene policies for trac 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 dened, you must apply the policy in CONTROL-PLANE mode to activate it. Policies dened for data trac 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.
Congure quality of service
Network trac is processed based on classication and policies that are created and applied to the trac.
Conguring QoS is a three-step process:
1 Create trac classes based on the classication.
2 Create QoS policies and dene actions to take for trac classes.
3 Apply the QoS policies to interface (port), system (all interfaces), or control-plane trac.
SYSTEM QOS or CONTROL-PLANE policies are special conguration 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
trac.
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.
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Quality of service