LFI with Multilink Point-to-Point Protocol
Multilink Point-to-Point Protocol (MLP) is an extension of PPP and is necessary
for LFI to be used. It provides load-balancing functionality over multiple WAN
links.With LFI, it provides packet fragmentation and proper resequencing,
according to RFC 1717. It treats multiple links as one circuit and gives load calculation
on both inbound and outbound traffic. Although MLP is necessary for
LFI to be used, it is not necessary to have more than one WAN link.
NOTE
FRF.12 is the Frame Relay Forum standard for implementing LFI on Frame
Relay. It was created with Voice over Frame Relay (VoFR) in mind, and
like MLP with LFI, it must be used when voice packets are mixed with
larger, nonvoice packets. It is available on the 2600/3600/MC3810/7200
platforms with IOS 12.0(4)T and later.