Rate and give feedback:  Feedback Received. Thank You!

Rate and give feedback: 

X

This document helped resolve my issue

Yes No

Additional Comments

800 characters remaining

May we contact you if necessary?

Name:  

E-mail: 

Enter a valid Email ID

Need product assistance? Contact Juniper Support

Submit

This site is protected by hCaptcha and its Privacy Policy and Terms of Service apply.

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.

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, seeConfiguring Inverse Multiplexing for ATM (IMA).
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), nonreal-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 maximum traffic allowed and the cdvt statement ensures that the configuration functions correctly.

5. (Optional) Specify the delay-buffer calculation:
   [edit class-of-service traffic-control-profiles profile-name]user@host# set delay-buffer-rate cps

   The delay-buffer calculation can be specified as cells per second—1000 cells per second (cps) through 160,000,000,000 cps.

6. (Optional) Define the maximum number of cells that a burst of traffic can contain, from 1 through 4000 cells:
   [edit class-of-service traffic-control-profiles profile-name]user@host# set max-burst-size max-burst-size
7. Define the largest number of cells per second that the shaper processes before it drops packets, from 61 cps through 38,641 cps:
   [edit class-of-service traffic-control-profiles profile-name]user@host# set peak-rate peak-rate

   The maximum peak rate value depends on the number of links in the IMA bundle—the more links, the higher the possible peak rate.

8. (Optional) Define the normal traffic rate averaged over time, from 61 cps through 38,641 cps:
   [edit class-of-service traffic-control-profiles profile-name]user@host# set sustained-rate cps
9. To complete the configuration, configure the per-unit scheduler:
   [edit interfaces interface-name]user@host# set per-unit scheduler

After you have configured shaping on the ATM IMA interface, enter the commit command from configuration mode.