Configuring Ppp And Mlppp; Overview - Extreme Networks WM-4T1i WAN Installation And User Manual

3

Configuring PPP and MLPPP

This chapter covers the following topics:
• Multilink PPP and Multilink Groups on page 3-2
• Configuring a PPP/MLPPP Link on page 3-3
• Monitoring PPP/MLPPP Links on page 3-6
• PPP/MLPPP Configuration Examples on page 3-7

Overview

Point-to-Point Protocol (PPP) is used across the entire range of communication speeds
and devices found on the internet. Typically, PPP uses Layer 3 to connect two broadcast
networks, say two ethernet LANs, into a single WAN by transporting IP packets over a
link. PPP can also use Layer 2 to bridge VLAN traffic.
Multilink PPP (MLPPP) is a protocol for combining a number of PPP links into one
bundle that transports traffic over the links in the bundle. Multilink PPP is supported
for T1 and E1 technologies in ExtremeWare, but not for T3. Instead, a T3 link is
configured as a single PPP link.
A multilink group is a bundle of individual PPP links that are configured to work
together as a single link. With a multilink group configured, it is easy to add or remove
PPP links in order to provide appropriate bandwidth. The multilink group balances
traffic among the individual PPP links and properly sequences packets across the
multilink group.
WAN Module Installation and User Guide 3-1