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Patton Resource Center |
Articles, White Papers and Tutorials about
Telecom, Datacom and Networking |
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Available Topics |
VoIP Intro
(VoIP Technology, Systems, Hardware, etc.)
VoIP in Use - Applications
(Software IP-PBX,
Call managers, FAX-over-IP, etc.)
Ethernet Extension
(Ethernet distance, LAN extension, etc.)
| Inverse
Multiplexer Technology
(T1/E1
Bonding, Jumbo Frames, MLPPP, etc.)
Industrial Networking
(T1/E1
harsh environments, NEMA 4, etc.) |
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Selected Topic and Article |
Related Articles |
| Inverse Multiplexer >
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
Installed in pairs, Patton's Inverse
multiplexer equipment employs MLPP to implement T1 bonding
and E1 bonding with jumbo
Ethernet frames. By bonding 2 or 4 T1 or E1 circuits into a
high-speed link, the Inverse Mux creates a transparent
n-by-T1/E1 communications channel for end-to-end Ethernet
communications.
Available in two (2)
and four (4) port versions, Patton's IPLink™ Model
2888 Inverse Mux equipment (Model 2888) provides a 4 Mbps or 8 Mbps
transparent channel. Even when one or more underlying TDM
circuits is lost, the bonded link stays up. Dynamic load
balancing redistributes the traffic load over the active
circuits, and again after the lost link is restored. The Model 2888
offers highly-reliable interconnections for MPLS and PE routers
as well as dependable high-speed service for such real-time applications as
VPNs with VLAN stacking, Internet Access, VoIP and video over IP.
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