Cisco ASR 901

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Cisco ASR 901 Aggregation Services Router Command Reference Guide
OL-26031-07
Chapter 1 CLI Command Reference
shape (policy-map class)
shape (policy-map class)
To shape traffic to the indicated bit rate according to the algorithm specified, or to enable ATM overhead
accounting, use the shape command in policy-map class configuration mode. To remove shaping and
leave the traffic unshaped, use the no form of this command.
shape [average | peak] mean-rate [burst-size] [excess-burst-size]
no shape [average | peak]
Syntax Description
Command Default When the excess burst size (Be) is not configured, the default Be value is equal to the committed burst
size (Bc). For more information about burst size defaults, see the Usage Guidelines section.
Traffic shaping overhead accounting for ATM is disabled.
Command Modes Policy-map class configuration (config-pmap-c)
average (Optional) Committed Burst (Bc) is the maximum number of bits sent
out in each interval.
peak (Optional) Bc + Excess Burst (Be) is the maximum number of bits
sent out in each interval.
mean-rate (Optional) Also called committed information rate (CIR). Indicates
the bit rate used to shape the traffic, in bits per second. When this
command is used with backward explicit congestion notification
(BECN) approximation, the bit rate is the upper bound of the range
of bit rates that will be permitted.
For a committed (average) burst rate, valid values are
30,000–10,000,000,000. For an excess (peak) burst rate, valid values
are 8,000-10,000,000,000.
burst-size (Optional) The number of bits in a measurement interval (Bc).
excess-burst-size (Optional) The acceptable number of bits permitted to go over the Be.
account (Optional) Enables ATM overhead accounting.
Note This keyword is required if you configure ATM overhead
accounting.
qinq Specifies queue-in-queue (qinq) encapsulation as the broadband
aggregation system (BRAS) to digital subscriber line access
multiplexer (DSLAM) encapsulation type for ATM overhead
accounting.
dot1q Specifies IEEE 802.1Q VLAN encapsulation as the BRAS-DSLAM
encapsulation type for ATM overhead accounting.
aal5 Specifies the ATM Adaptation Layer 5 service for ATM overhead
accounting. AAL5 supports connection-oriented variable bit rate
(VBR) services.