Nortel Networks 8000 - Manual (Page 132)

6 PPP and MP configuration
Nortel Secure Router 8000 Series
Configuration -WAN Access
The link binds with the specified virtual template (VT) without authenticating users on
the VT. For physical interfaces bound to a VT, you can either configure authentication or
not.
- If you configure authentication, bind the links directly to the specified virtual
interface template after the interface passes the authentication.
- If you do not configure authentication, bind the links directly to the specified virtual
template when the interface is available.
• Authentication binding
Use the following parameters to authenticate the binding:
- User name indicates the received peer username of the PPP link in PAP or CHAP
authentication.
- Endpoint Discriminator identifies a router only. It is the received peer endpoint
discriminator in the LCP negotiation.
You can use the preceding two parameters separately or simultaneously to authenticate the
binding. The interfaces with the same username and endpoint discriminator are bound to the
same virtual template.
If you bind physical interfaces to a VT based on user name, you must configure the local
interface with CHAP or PAP to authenticate the peer. The physical interfaces must be bound
to MP at the same time.
Authentication modes of different physical interfaces of the same VT can be different. For
detailed configuration, see Configuring unidirectional PAP or Configuring unidirectional
CHAP.
In applications, you can configure one way authentication. Only one end is directly bound to
the virtual template and the other end searches for the template according to the username.
Negotiation process
The MP negotiation process has two processes, that is, the LCP negotiation and the NCP
negotiation process.
• LCP negotiation: The two peers must perform the LCP negotiation. In addition to
negotiating general LCP parameters, it authenticates whether the peer interface works in
MP mode. If the two peers work in different mode, LCP is unsuccessful.
• NCP negotiation: Perform the NCP negotiation according to the NCP parameters of the
MP-group interface and the specified virtual interface template. The NCP parameter of
the physical interface does not perform.
When the NCP negotiation succeeds, you can set up the MP link.
6.1.3 references
For more information about PPP, refer to the following documents.
Document No. Description
RFC1661 The Point-to-Point Protocol (PPP)
RFC1144 Compressing TCP/IP headers for low-speed serial links
RFC1717 The PPP Multilink Protocol (MP)
6-6 Nortel Networks Inc. Issue 5.3 (30 March 2009)