Multi-Link Point-to-Point Protocol (MLPPP)
Multi-Link Point-to-Point Protocol (MLPPP) is one of the underlying techniques employed to implement bonded T1 or bonded E1 circuits.
The two most common bonding techniques for T1/E1 circuits currently in use are Multilink Point to Point Protocol (MLPPP) and Generic Framing Procedure/Virtual Concatenation (GFP/VCAT).
Both techniques offer the ability to deliver Ethernet services over bonded T1/E1s and both allow the ability to add new circuits as more bandwidth is needed. Load balancing and self-healing link redundancy are native to MLPPP. To implement these features using GFP/VCAT, an additional protocol, E1 Link Capacity Adjustment Scheme(LCAS), must also be implemented.
MLPPP, however, is more widely deployed, proven and hardened in the field over the past 20 years. As a result, MLPPP-based bonding equipment is easier to test and support, since a broad selection of test equipment and software is readily available. Long used by a wide range of vendors, the standards-based protocol offers assurance of interoperability