Mlppp Header; Mlppp Configuration Concerns; Enabling Mlppp - HP 7102dl - ProCurve Secure Router Configuration Manual

Increasing Bandwidth
Configuring MLPPP
2-6
Endpoint Discriminator (ED) options—Peers negotiate how the receiving
peer will identify the sending peer. One of these methods is an ED, which
can be generated from an IP address, media access control (MAC)
address, or PPP magic number. Every carrier line in the MLPPP bundle
originates from the same endpoint and is given the same ED. The receiving
peer recognizes that frames received from different carrier lines, but with
the same ED, come from the same peer.

MLPPP Header

The MLPPP header helps the receiving peer reconstruct frame fragments in
the correct order. When a peer sends a PPP frame across a multilink point-to-
point connection, it first fragments the PPP frame. It then encapsulates
fragments in new PPP frames and sends them simultaneously over each
aggregated line. The new PPP frame includes:
a new PPP header
a four-field MLPPP header
a fragment of the original PPP frame
If peers agreed to use the short sequence number header format during the
link establishment, the MLPPP header includes only two fields.
The MLPPP header includes a flag and a sequence number. The sequence
number indicates the fragment's place in the reconstructed PPP frame.

MLPPP Configuration Concerns

When you enable MLPPP for a connection, the LCP automatically negotiates
the necessary options, such as the MRRU and ED. You simply need to bind the
extra carrier lines to the PPP interface. MLPPP automatically adds the lines
to the bundle.
Carrier lines send keepalive signals. MLPPP automatically removes lines that
go down from the bundle and adds lines that come back up. The PPP connec-
tion stays open as long as at least one line is good.

Enabling MLPPP

Identify the PPP interface for the connection whose bandwidth you want to
increase. Move to the configuration mode context for this interface and enable
multilink:
ProCurve(config)# interface ppp 1
ProCurve(config-ppp 1)# ppp multilink