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Enabling Link Fragmentation and Interleaving

To configure link fragmentation and interleaving (LFI), you define the MLPPP encapsulation type and enable fragmentation and interleaving of packets by specifying the following properties—the fragmentation threshold and fragment interleaving. In this example, a fragmentation threshold of 128 bytes is set on the MLPPP bundle that applies to all traffic on both constituent links, so that any packet larger than 128 bytes transmitted on these links is fragmented.

For more information about LFI, see Link Fragmentation and Interleaving Overview.

To enable LFI:

  1. Navigate to the top of the interfaces configuration hierarchy in either the J-Web or CLI configuration editor.
  2. Perform the configuration tasks described in Table 93 on Router R0 and Router R1.
  3. Go on to Defining Classifiers and Forwarding Classes.

Table 93: Enabling LFI

Task

J-Web Configuration Editor

CLI Configuration Editor

Navigate to the Interfaces level in the configuration hierarchy.

Specify the link services interface for fragmentation.
  1. In the J-Web interface, select Configuration>View and Edit>Edit Configuration.
  2. Next to Interfaces, click Edit.
  3. Under Interface, next to ls-0/0/0, click Edit.

From the [edit] hierarchy level, enter

edit interfaces ls-0/0/0

Specify the multilink encapsulation type, enable LFI, and set the fragmentation threshold for the multilink interface.

Fragment Threshold—Set the maximum size, in bytes, for multilink packet fragments—for example, 128. Any nonzero value must be a multiple of 64 bytes. The value can be between 128 and 16320. The default is 0 bytes (no fragmentation).

Interleave Fragments—Specify interleaving packet fragments with delay-sensitive (LFI) packets.
  1. Under Unit, next to 0, click Edit
  2. From the Encapsulation list, select multilink-ppp as the encapsulation type.
  3. In the Fragment threshold box, type 128.
  4. Select Interleave fragments.
  5. Click OK.

Enter

set unit 0 encapsulation multilink-ppp fragment-threshold 128 interleave-fragments

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