MP overview
Multilink PPP (MP) enables you to bind multiple PPP links into one MP bundle for increasing bandwidth. After receiving a packet that is larger than the minimum packet size for fragmentation, MP fragments the packet and distributes the fragments across multiple PPP links to the peer end. After the peer end receives these fragments, it reassembles them into one packet and passes the packet to the network layer.
In addition to increasing bandwidth, MP also provides link-layer load sharing, which can implement backup. MP fragmentation can reduce transmission delay, especially on low-speed links.
MP is available to all physical or virtual interfaces with PPP encapsulation enabled, including serial, ISDN BRI/PRI, and PPPoX (PPPoE, PPPoA, or PPPoFR) interfaces. In MP configuration, however, it is preferred that an MP bundle include only one type of interface.