Mlfr Link Integrity Protocol; Figure 5: Mlfr Aggregation Of T1 Lines Into A Single Bundle; Figure 6: Terminating The Bundle At An Mlfr Bridge; Table 9: Lip Messages And Functions - Juniper JUNOSE SOFTWARE 11.0.X - LINK LAYER CONFIGURATION GUIDE 4-1-2010 Configuration Manual

JUNOSe 11.0.x Link Layer Configuration Guide
This implementation of MLFR logically aggregates up to eight T1 or E1 connections
into a single virtual connection, known as a bundle, to a given customer site. The
connections can terminate at a CPE (Figure 5 on page 134) or a Multilink Frame Relay
bridge (Figure 6 on page 134).

Figure 5: MLFR Aggregation of T1 Lines into a Single Bundle

Figure 6: Terminating the Bundle at an MLFR Bridge

MLFR Link Integrity Protocol

Member links in an MLFR bundle support the MLFR Link Integrity Protocol (LIP). LIP
offers several types of messages, which allow member links to join and leave a
bundle. See Table 9 on page 134.

Table 9: LIP Messages and Functions

134
Overview
LIP Message Function
Add-Link Member link sends this message to request to join a bundle.
Add-Link-Ack Member link sends this message when it receives an Add-Link
message.
Add-Link-Rej Member link sends this message to reject a request to join a
bundle.
Hello Member link sends this message to check the status of another
member.
Hello-Ack Member link sends this message when it receives a Hello
message.
Remove-Link Member link sends this message to request to leave a bundle.
Remove-Link-Ack Member link sends this message when it receives a
Remove-Link message.