Web Management Guide-R01

Chapter 10 | Quality of Service
Creating QoS Policies
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behavior, and two bits for the color scheme used to control queue congestion
with the srTCM and trTCM metering functions.
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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 17, “Default Mapping of CoS/CFI to Internal PHB/Drop
Precedence,” on page 260).
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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 16, “Default Mapping of DSCP Values to Internal PHB/Drop
Values,” on page 258).
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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.
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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.
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Committed Information Rate (CIR) – Rate in kilobits per second.
(Range: 0-10000000 kbps at a granularity of 64 kbps or maximum port
speed, whichever is lower)
The rate cannot exceed the configured interface speed.
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Committed Burst Size (BC) – Burst in bytes. (Range: 64-16000000 at a
granularity of 4k bytes)
The burst size cannot exceed 16 Mbytes.
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Conform – Specifies that traffic conforming to the maximum rate (CIR)
will be transmitted without any change to the DSCP service level.
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Transmit – Transmits in-conformance traffic without any change to
the DSCP service level.
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Violate – Specifies whether the traffic that exceeds the maximum rate
(CIR) will be dropped or the DSCP service level will be reduced.