HP-UX PPP Enhancements - PPPoE and PPPv6 for TOUR 1.0

hp-ux ppp enhancements – pppoe and pppv6 white paper
introduction
TCP/IP has been the de-facto standard of Internet. Because the Internet is
extremely huge with hosts separated by thousands of miles, it is not possible to
connect hosts across the Internet through Ethernet. Telecommunication
providers across the world provide serial link connectivity to their customers.
However, TCP/IP packets cannot be transmitted directly over serial links. To
transmit TCP/IP packets over serial links, the Point-to-Point protocol was
developed.
The point-to-point protocol provides a method for transmitting multi-protocol
datagram over point-to-point link. PPP includes a method for encapsulating
multi-protocol datagram; a link control protocol for establishing, configuring
and testing the data link connection; a family of network control protocols for
establishing, and configuring different network layer protocols.
PPP on HP-UX includes pppd, a command program; a startup script; and a
number of sample configuration files.
PPP on HP-UX can be used to accomplish the following tasks:
 Dial-in to HP 9000 serial IP lines.
 Dial-out from HP 9000 serial IP lines.
 Direct-connect to HP 9000 serial IP lines.
ppp on hp-ux
PPP on HP-UX currently offers the following features:
On Demand Dial-Up Connections
PPP establishes an asynchronous link over standard telephone lines whenever
traffic warrants a call. This is in contrast to network routers that require an
expensive leased line to provide a constant connection. When the traffic has
completed, PPP hangs up the connection to save telephone costs. User
applications cannot distinguish between an on-demand dialup link and the
one that is constantly maintained, except by looking at the clock.
Link Traffic Control
The HP-UX system administrator has complete control over the traffic that is
allowed to traverse the link. PPP can turn on an HP-UX system into a selective-
isolation packet filtering "firewall" gateway, enhancing the security provided to
other systems on the local network.
Minimal Transmission Overhead
PPP compresses HDLC address control and protocol fields, as well as TCP
headers. This improves both throughput and interactive response on typical
modem connections. The PPP interface to HP-UX TCP/IP implements Van
Jacobson's TCP "fast queue" scheme, whereby interactive packets have priority
to transmission on a congested link.
market
forecast
PPP enhancements on HP-UX, PPPoE and PPPv6, forebode to create
tremendous business opportunities in the Internet Solution Provider (ISP) and 3G
markets.
Apropos, a market survey result indicates that the Internet traffic will proliferate
from 1 million terabytes/m to 16M terabytes/m in the next few years.
It is expected that ISPs will necessitate high-speed access for their end
2