Configuring MLPPP over ADSL Interfaces

J Series and SRX Series devices with an ADSL interface support link fragmentation and interleaving (LFI) through a Multilink Point-to-Point Protocol (MLPPP).

Note: Currently, Junos OS supports bundling of only one xDSl link under bundle interface.

To configure MLPPP, see the Junos Network Interfaces Configuration Guide.

To support MLPPP encapsulation and the family mlppp on the ADSL interface on a J Series or SRX Series device, an existing Junos OS CLI is enabled. To configure MLPPP encapsulation and the family mlppp, use the following commands:

set interfaces at-5/0/0 unit 0 encapsulation atm-mlppp-llc

set interfaces at-5/0/0 unit 0 family mlppp bundle lsq-0/0/0.1

To establish an ADSL link between network devices, you must use some intermediate connections. First, use an RJ-11 cable to connect the customer premises equipment (CPE) (for example, a J Series or SRX Series device) to a DSLAM patch panel to form an ADSL link. Then use OC3 or DS3 to connect the DSLAM to M Series or E Series devices to form an ATM backbone. Figure 19 shows a typical example of MLPPP over ADSL end-to-end connectivity.