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of cells that can be included in a burst, and the long-term sustained ATM cell traffic
rate.
If your router is equipped with an ATM2 IQ PIC, each VC can have independent
shaping parameters. For more information, see "Defining Virtual Path Tunnels" on
page 324.
NOTE: When the DS3 or E3 port parameters are not identical on all ports of a
multiport ATM DS3 or E3 PIC, the ATM PIC driver might not always use the minimum
port shaping rate (of all the ports on a multiport ATM DS3 or E3 PIC) selected for cell
transmission shaping. The PIC's shaping rate is always updated to conform to the
last port setting updated by the PIC software driver, rather than use the minimum
port (shaping) rate. There is no syslog message to inform the user of the shaping rate
decision applied by the software driver.
By default, the bandwidth utilization is unlimited; that is, unspecified bit rate (UBR)
is used. Also, by default, buffer usage by VCs is unregulated.
To define limits to bandwidth utilization, include the
shaping {
(cbr rate | rtvbr peak rate sustained rate burst length | vbr peak rate sustained rate
burst length);
queue-length number;
}
For a list of hierarchy levels at which you can include this statement, see shaping.
The
rtvbr
statement is supported on ATM2 IQ PICs only. The
is supported on ATM1 PICs only.
To configure VP tunnels on ATM2 IQ interfaces, include the
[edit interfaces interface-name atm-options vpi vpi-identifier]
[edit interfaces interface-name atm-options vpi vpi-identifier]
shaping {
(cbr rate | rtvbr peak rate sustained rate burst length | vbr peak rate sustained rate
burst length);
}
When configuring ATM traffic shaping, you can do the following:
Configuring ATM CBR on page 328
Configuring ATM2 IQ Real-Time VBR on page 328
Configuring ATM VBR on page 329
Specifying ATM1 Shaping Values on page 329
Specifying ATM2 IQ Shaping Values on page 332
Chapter 13: Configuring ATM Interfaces
statement:
shaping
queue-length
shaping
hierarchy level:
Defining the ATM Traffic-Shaping Profile
statement
statement at the
327
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