Using Multi-System Multilink Ppp - Bay Networks 5393 User Manual

Release 5.1 Supplement for Remote Annexes
119346-A Rev. A
48

Using Multi-System Multilink PPP

Multi-system Multilink PPP (MMP), a superset of Multilink PPP, allows
MP links belonging to the same MP bundle to terminate on multiple
Remote Annexes. The Remote Annexes are combined together in an
MMP group to use all of the incoming channels in the group, increasing
the potential bandwidth of an MP bundle. Bay Networks Remote Annexes
support MMP for incoming calls only. The locations of the MP links are
completely transparent to remote users; users need (and receive) no
information about which Remote Annex terminates a given MP link. The
location of the MP bundle head is determined by the bundle discovery
protocol. The Layer 2 Tunneling Protocol (L2TP) is used to tunnel MP
links to remote MP bundle heads, ensuring that successive links on one
Remote Annex in an MMP group are combined into the same bundle as
the primary link on another Remote Annex.
MMP is disabled by default, through the annex parameter mmp_enabled
set to n. To enable MMP, you must set mmp_enabled to y and configure
the global port or inbound channels for MP, if you have not done so
already. MMP relies on three other features, which are enabled when
MMP is enabled:
• MP bundle discovery
• Virtual MP links
• Layer 2 Tunneling Protocol (L2TP)