Configuring Shaping on an ATM IMA Pseudowire
On ACX Series routers, ATM shaping is applied in the egress direction only. Only cell-based
shaping is supported. A traffic control profile, which defines the ATM scheduling
parameters, is configured at the [edit class-of-service] hierarchy level. The traffic control
profile is then applied to the ATM logical interface configured at the [edit class-of-service]
hierarchy level.
NOTE: The configuration of ATM shaping requires the inclusion of the per-unit
scheduler statement at the [edit interfaces interface-name] hierarchy level.
NOTE: Configuring shaping on an ATM IMA pseudowire is not applicable on
ACX5048 and ACX5096 routers.
The following steps require you to navigate various levels in the configuration hierarchy.
For information about navigating the CLI, see Using the CLI Editor in Configuration Mode
in the CLI User Guide.
To configure a traffic-shaping profile on an ATM IMA pseudowire:
1. Define the ATM IMA pseudowire. For information about defining the ATM IMA
pseudowire, see “Configuring Inverse Multiplexing for ATM (IMA)” on page 185.
2. In configuration mode, go to the [edit class-of-service] hierarchy level:
[edit]
user@host# edit class-of-service
3. Specify the traffic-shaping profile:
[edit class-of-service]
user@host# edit traffic-control-profiles profile-name
The following steps describe the traffic control profile options that you can configure.
The options include atm-service, delay-buffer-rate, max-burst-size, peak-rate, and
sustained-rate.
4. (Optional) Specify the service category that determines the traffic-shaping parameter
for the ATM queue at the ATM IMA pseudowire:
[edit class-of-service traffic-control-profiles profile-name]
user@host# set atm-service (cbr | nrt-vbr | rt-vbr)
Select one of the following service traffic categories, depending on the needs of your
network: constant bit rate (cbr), non-real-time variable bit rate (nrtvbr), or real-time
variable bit rate (rtvbr). All service traffic categories must include the peak-rate and
cdvt statements for the configuration to work. The peak-rate statement limits the
901Copyright © 2017, Juniper Networks, Inc.
Chapter 27: Configuring Class of Service
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