Juniper JUNOSE SOFTWARE FOR E SERIES 11.3.X - LINK LAYER CONFIGURATION GUIDE 2010-10-13 Configuration Manual page 359

ppp fragmentation
ppp multilink enable
ppp reassembly
Copyright © 2010, Juniper Networks, Inc.
Use to add an MLPPP link interface—also known as an MLPPP bundle member—to an
MLPPP bundle.
Example
host1(config-if)#member-interface serial 2/0:1/1
Use the no version to remove the specified interface from the MLPPP bundle.
See member-interface.
Use to enable fragmentation on an MLPPP link interface.
If fragmentation is enabled on the link, you can optionally specify the maximum
fragment size to be used on that link, in the range 128–65535 octets.
A link's maximum fragment size cannot exceed the MTU size on that link.
We recommend that all member links in an MLPPP bundle be assigned the same
fragment size.
Do not configure both MLPPP fragmentation and IP fragmentation of L2TP packets
(with the ip mtu command) on the same interface. Instead, you must choose only one
of the fragmentation configurations by setting it to the necessary value and set the
other fragmentation configuration to the maximum allowable value.
Example
host1(config-if)#ppp fragmentation 128
Use the no version to disable fragmentation on the link and restore the default fragment
size, which is the link's MTU.
See ppp fragmentation.
Use in a profile to enable the creation of dynamic MLPPP interfaces.
Example
host1(config-profile)#ppp multilink enable
Use the no version to reject any incoming requests to create dynamic MLPPP interfaces.
See ppp multilink enable.
Use to enable reassembly on an MLPPP link interface.
If reassembly is enabled on the link, you can optionally specify the administrative MRRU
for the link, in the range 64–65535 octets. The administrative MRRU is the maximum
allowable size of the PPP packet payload that the router can receive.
A link's MRRU must be greater than or equal to the local MRU on that link.
We recommend that all member links in an MLPPP bundle be assigned the same
reassembly setting: enabled or disabled.
Chapter 9: Configuring Multilink PPP
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