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HAPTER

| Quality of Service

Creating QoS Policies

– 147 –

ES-2000 Series

PARAMETERS

These parameters are displayed:

Add

◆ Policy Name – Name of policy map. (Range: 1-16 characters)

◆ Description – A brief description of a policy map. (Range: 1-256

characters)

Add Rule

◆ Policy Name – Name of policy map.

◆ Class Name – Name of a class map that defines a traffic classification

upon which a policy can act.

◆ Action – This attribute is used to set an internal QoS value in hardware

for matching packets. The PHB label is composed of five bits, three bits

for per-hop behavior, and two bits for the color scheme used to control

queue congestion with the srTCM and trTCM metering functions.

■

Set CoS – Configures the service provided to ingress traffic by

setting an internal CoS value for a matching packet (as specified in

rule settings for a class map). (Range: 0-7)

See Table 16, "Default Mapping of CoS/CFI to Internal PHB/Drop

Precedence," on page 137).

■

Set PHB – Configures the service provided to ingress traffic by

setting the internal per-hop behavior for a matching packet (as

specified in rule settings for a class map). (Range: 0-7)

See Table 15, "Default Mapping of DSCP Values to Internal PHB/

Drop Values," on page 134).

■

Set IP DSCP – Configures the service provided to ingress traffic by

setting an IP DSCP value for a matching packet (as specified in rule

settings for a class map). (Range: 0-63)

◆ Meter – Check this to define the maximum throughput, burst rate, and

the action that results from a policy violation.

◆ Meter Mode – Selects one of the following policing methods.

■

Flow (Police Flow) – Defines the committed information rate (CIR,

or maximum throughput), committed burst size (BC, or burst rate),

and the action to take for conforming and non-conforming traffic.

Policing is based on a token bucket, where bucket depth (that is,

the maximum burst before the bucket overflows) is specified by the

“burst” field, and the average rate tokens are removed from the

bucket is by specified by the “rate” option.