Cisco Systems WSC4500X16SFP Creating a Policy Map, Configuring Policy-Map Class Actions

27-32
Software Configuration Guide—Release 12.2(25)SG
OL-7659-03
Chapter27 Configuring Quality of Service
Configuring QoS
Creating a Policy Map
To create a policy map, perform this task:
Configuring Policy-Map Class Actions
These sections describe policy-map class action configuration:
•Configuring the Policy-Map Class Trust State, page 27-32
•Configuring the Policy Map Class DBL State, page 27-32
•Configuring Policy-Map Class Policing, page 27-33
•Using a Named Aggregate Policer, page 27-33
•Configuring a Per-Interface Policer, page 27-33
Configuring the Policy-Map Class Trust State
To configure the policy-map class trust state, perform this task:
When configuring the policy-map class trust state, note the following:
•You can enter the no trust command to use the trust state configured on the ingress interface (this
is the default).
•With the cos keyword, QoS sets the internal DSCP value from received or interface CoS.
•With the ds cp keyword, QoS uses received DSCP.
Configuring the Policy Map Class DBL State
To configure the policy map class DBL state, perform this task:
Command Purpose
Switch(config)# [no] policy-map policy_name Creates a policy map with a user-specified name.
Use the no keyword to delete the policy map.
Command Purpose
Switch(config-pmap-c)# [no] trust
{cos | dscp}
Configures the policy-map class trust state, which selects
the value that QoS uses as the source of the internal
DSCP value (see the “Internal DSCP Values” section on
page 27-13).
Use the no keyword to clear a configured value and return
to the default.
Command Purpose
Switch(config-pmap-c)# [no] dbl Configures the policy-map class DBL state, which tracks
the queue length of traffic flows (see the “Active Queue
Management” section on page 27-14).
Use the no keyword to clear an DBL value and return to
the default.