Mlp Bundle Interface And Service Policies - Cisco 10000 Series Configuration Manual

Quality of service configuration guide

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Multilink PPP-Based Link Fragmentation and Interleaving

To calculate the fragment size, do the following:

Calculate the nominal fragment size (link weight) by using the following formula:

Determine the number of whole ATM cells the nominal fragment size represents.

If the number of ATM cells is less than two, then use two ATM cells in Step 3. The minimum number of

ATM cells you can have is 2.

Calculate the total bytes per fragment, including the MLP header bytes and AAL5 trailer bytes, by

multiplying the number of ATM cells you calculated in Step 2 by 48:

Subtract the MLP header bytes and AAL5 trailer bytes.

The AAL trailer is 8 bytes.

The number of MLP header bytes depends on the AAL5 encapsulation and whether or not protocol

compression is enabled (see

whether or not protocol compression is used.

AAL5 Encapsulation

MLP Bundle Interface and Service Policies

The router applies a service policy, attached to a multilink interface, to only the MLP bundle interface.

The QoS actions defined by the service policy are applied to the outbound nonreal-time packets before

the packets reach the bundle first-in first-out (FIFO) queue. The nonreal-time packets are fragmented in

the FIFO queue and then the real-time packets are interleaved between the fragments as the real-time

packets exit their priority queue.

Cisco 10000 Series Router Quality of Service Configuration Guide

(Link Bandwidth * Fragment-Delay) / 8

Number of Cells * 48

lists the number of bytes in the MLP header, depending on the AAL5 encapsulation type and

MLP Header Bytes and AAL5 Trailer Bytes

Fragmenting and Interleaving Real-Time and Nonreal-Time Packets

No. of MLP Header

No. of AAL5 Trailer

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