Alcatel Carrier Internetworking Solutions Omni Switch/Router - Manual (Page 943)

Page 30-5
The configuration of a T1/E1 interface is described in Chapter 33 titled “Managing T1 and E1
Ports.”
The configuration of a universal serial port (USP) on a WSX-S board is described in Chapter
28 titled “Managing WAN Switching Modules.”
Step 2. Configure the Operation of PPP Itself
The information configured at the PPP level includes the remote and local user IDs and
passwords, network protocol information, the use of data compression, and retry and delay
information to be used during PPP connection establishment with LCP. The UI commands
used to configure PPP connections (called “PPP Entities”) allow for the adding, modifying,
and viewing of PPP connections and their operational status. This chapter describes the
configuration of PPP Entities (connection configurations) using the
pppadd , pppmodify ,
pppdelete , pppview , and pppstatus commands.
Step 3. Configure a Link Between the Physical Interface and PPP
As mentioned above, three kinds of physical interfaces can support PPP connections:
Universal Serial Ports (on all WSX boards,), T1/E1 channels (on the WSX-FT1/E1 board), and
ISDN lines (on the WSX-BRI board).
The “WAN Links” used to support PPP connections vary somewhat, depending upon which
type of physical interface is being used for PPP. When the physical interface is a Universal
Serial Port (USP) or a fractional T1/E1 channel (which are permanent channels), the port is
dedicated to the PPP connection and the “WAN Link” simply identifies the physical interface
in terms of the slot and port. When the physical interface being used is an ISDN interface
(which provides dynamic, switched connections), the “WAN Link” identifies the numbering
information that is to be used to establish the serial connection and the slot/port if necessary.
The UI commands used to configure WAN Links allow for the adding, modifying, and
viewing of the links, and the display of their operational status. See Chapter 31 titled “WAN
Links” for detailed information on the commands used to configure WAN Links.
Multiple links can be configured when employing Multilink PPP, one for each link in the
bundle. For Multilink PPP over ISDN, each link configured for a PPP entity is called every
time the connection is attempted and Multilink PPP is successfully negotiated. For normal PPP
over ISDN, when a connection with a PPP entity is attempted, each link is called until one is
successful.