Juniper JUNOSE 11.1.X - LINK LAYER CONFIGURATION 4-7-2010 Configuration Manual page 612

JUNOSe 11.1.x Link Layer Configuration Guide
NOTE: Although an AAA profile and an interface profile have similar functionality,
they are not related and you need to treat them differently.
NOTE: For more information about AAA profiles, see JUNOSe Broadband Access
Configuration Guide.
ppp authentication
580
Configuring a Dynamic Interface from a Profile
with the same name is added, the interface cannot authenticate until the AAA
profile is reassigned.
Example
host1(config-profile)#ppp aaa-profile westford24
Use the no version to remove the AAA profile assignment.
See ppp aaa-profile.
Use to require authentication from the PPP peer.
To specify the name of a virtual router (VR) to be used as the authentication VR
context, use the virtual-router keyword. Keep the following points in mind when
you use the ppp authentication virtual-router command:
When you specify a VR in the ppp authentication command, AAA does not
query the domain map for the assigned VR context. Instead, AAA uses the
VR specified in the ppp authentication command as the authentication VR
context and issues the authentication request to the authentication server
in the assigned VR context.
If you specify the default VR as the authentication VR context, AAA loosely
binds the user to the default VR. This means that RADIUS can override the
default VR context with a new VR context during the authentication process.
When the ppp authentication virtual-router command specifies the default
VR, AAA returns either the default VR or the VR specified by RADIUS.
If you specify a VR other than the default VR as the authentication VR, AAA
tightly binds the user to the specified VR. This means that RADIUS cannot
override the specified VR context with a new VR context during the
authentication process. When the ppp authentication virtual-router
command specifies a nondefault VR, AAA returns the specified VR.
If the VR specified in a profile with the ip virtual-router command differs
from the VR provided by AAA, IP uses the VR provided by AAA when the
dynamic IP upper-layer interface is created. For more information about
using the ip virtual-router command, see "ip virtual-router" on page 575.
The router supports the MD5 authentication algorithm for CHAP authentication.
Example 1 Specifies PAP or CHAP as the primary authentication protocol, and
the other authentication protocol as the alternative. For example, the following