Avaya Configuring MPLS Services Manuel d'utilisateur télécharger pdf (Page 55)

Customizing the MPLS Configuration

305754-A Rev 00

3-19

Setting the Default VC Transmit SCR

The transmit sustainable cell rate (SCR) specifies the upper limit of the ATM

connection conforming average rate on the transmitting side. The average rate

equals the total number of cells transmitted, divided by the duration of the

connection. The default value, 0, indicates that the transmit SCR is off.

Using the SCR, you can define the future cell flow of a VC in greater detail than

by using only the peak cell rate.

The SCR maps directly to the minimum cell rate (MCR). The MCR defines the

minimum amount of guaranteed bandwidth allowed for the default VC on the

ATM line.

When setting the SCR, keep the following in mind:

• To be useful, the SCR must not exceed the PCR.

• If you know the average rate, set the SCR approximately 10 percent higher

than this value.

• VCs may fail to operate with SCR values lower than 128 cells/s.

• Entering 0 for the SCR turns off this function.

After you determine the transmission rate of your ATM device, set the sustainable

cell rate within the specified range.

8. Click on

Done

. You return to the Select Connection Type

window.

9. Click on

Done

. You return to the Configuration Manager

window.

Site Manager Procedure

(continued)

You do this System responds

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Avaya Configuring MPLS Services Manuel d'utilisateur Page 55