Application; Supported Configurations; Module Requirements; Link Configuration Parameters - Juniper JUNOSE 11.1.X - LINK LAYER CONFIGURATION 4-7-2010 Configuration Manual

Application

You can use MLPPP fragmentation and reassembly to reduce transmission latency.
You can also use the feature to implement a packet-prioritization scheme that allows
smaller, delay-sensitive packets (such as high-priority voice packets) to be interleaved
with or race ahead of larger, delay-insensitive packets (such as low-priority data
packets) when they are transmitted in the network.

Supported Configurations

Table 16 on page 325 lists the static and dynamic MLPPP configurations on E Series
routers that support fragmentation and reassembly.

Table 16: Supported Configurations for MLPPP Fragmentation and Reassembly

Static MLPPP Configurations
Static MLPPP over ATM 1483 subinterfaces
Static MLPPP over PPPoE over ATM 1483
subinterfaces
Static MLPPP over serial (HDLC) interfaces
–
Static MLPPP over PPPoE over Ethernet

Module Requirements

For a list of the line modules and corresponding I/O modules that support MLPPP
fragmentation and reassembly on ERX7xx models, ERX14xx models, and the ERX310
router, see ERX Module Guide, Appendix A, Module Protocol Support.
For a list of the line modules and corresponding IOAs that support MLPPP
fragmentation and reassembly on the E120 and E320 routers, see E120 and E320
Module Guide, Appendix A, IOA Protocol Support.

Link Configuration Parameters

The parameters for MLPPP fragmentation and reassembly are configured on a per-link
basis for each link interface (also known as a member link) in an MLPPP bundle.
By default, fragmentation and reassembly are disabled for MLPPP links. You can
enable or disable fragmentation and reassembly for an individual link, or for all
member links in a bundle, by using the ppp fragmentation and ppp reassembly
commands. However, you must configure the same fragmentation setting and the
same reassembly setting enabled or disabled for all member links in a bundle.
Chapter 9: Configuring Multilink PPP
Dynamic MLPPP Configurations
Dynamic MLPPP over ATM 1483 subinterfaces
Dynamic MLPPP over PPPoE over ATM 1483
subinterfaces
Dynamic MLPPP over serial (HDLC) interfaces
Dynamic MLPPP over L2TP (on the L2TP network
server)
Dynamic MLPPP over PPPoE over Ethernet
Configuring MLPPP Fragmentation and Reassembly
325