B-Ras Support - Juniper JUNOSE SOFTWARE FOR E SERIES 11.3.X - LINK LAYER CONFIGURATION GUIDE 2010-10-13 Configuration Manual

JunosE 11.3.x Link Layer Configuration Guide

B-RAS Support

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To configure the router to ignore the LCP peer magic number mismatch and retain the
PPP connection, use the ppp magic-number ignore-mismatch command from Interface
Configuration mode or Subinterface Configuration mode. For more information, see "ppp
magic-number ignore-mismatch" on page 276.
To verify configuration of LCP peer magic number validation on the router, you can use
the show ppp interface command. For more information, see "show ppp interface" on
page 283.
Keep the following points in mind when configuring the router to ignore the peer magic
number mismatch and retain the PPP connection:
If the peer negotiates the magic number but sends the router an LCP echo request or
reply packet that contains a null or invalid magic number, the router strictly terminates
the PPP connection. The router can ignore a mismatch of the LCP peer magic number
only when the peer has not negotiated the magic number.
Using the ppp magic-number disable command to disable negotiation of the magic
number on the router does not affect validation of the peer magic number. When you
issue the ppp magic-number disable command, the router sets only the local magic
number to null, but does not change or validate the peer magic number. (For more
information, see "ppp magic-number disable" on page 276.)
You can also configure validation of the LCP peer magic number for static MLPPP
interfaces, dynamic PPP interfaces, and dynamic MLPPP interfaces. For more information
about configuring static MLPPP interfaces, see "Configuring Multilink PPP" on page 299.
For more information about using profiles to configure dynamic PPP and dynamic MLPPP
interfaces, see "Configuring a Dynamic Interface from a Profile" on page 559 in "Configuring
Dynamic Interfaces" on page 511.
Broadband Remote Access Server (B-RAS) is an application that aggregates the output
from digital subscriber line access multiplexers (DSLAMs). B-RAS provides user PPP
sessions and PPP session termination and routes traffic onto the backbone. See JunosE
Broadband Access Configuration Guide for details on B-RAS.
The router provides an enhanced version of PPP to accommodate B-RAS with the
following features:
Internet Protocol Control Protocol (IPCP) extensions for Windows Internet Name
Service (WINS) and Domain Name System (DNS) name server addresses
Password Authentication Protocol (PAP)
Challenge Handshake Authentication Protocol (CHAP)
Keepalive timeout
Session timeout
Inactivity timeout
Accounting
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