Allied Telesis AR400 Series Router - Manual (Page 80)

80 AR400 Series Router User Guide
Software Release 2.6.1
C613-02021-00 REV D
Point to Point Protocol (PPP)
The Point-to-Point Protocol (PPP) establishes a connection between the router
and a service provider, on demand. PPP provides mechanisms for transmitting
data over synchronous connections, ISDN, ACC and L2TP calls, groups of
TDM slots, and Ethernet.
Each protocol carried over PPP has an associated Network Control Protocol
(NCP) that negotiates options for the protocol and brings up the link for that
protocol.
To create or destroy a PPP interface over a synchronous port, an ISDN call, an
ACC call, a MIOX circuit, an L2TP call, a TDM group (referred to as a physical
layer) or a PPP over Ethernet service, enter the command.
CREATE PPP=ppp-interface OVER=physical-interface
DESTROY PPP=ppp-interface
To add or delete a synchronous port, an ISDN call, an ACC call, a MIOX circuit,
an L2TP call, TDM group or a PPP over Ethernet service to the PPP interface,
enter the command:
ADD PPP=ppp-interface OVER=physical-interface
DELETE PPP=ppp-interface OVER=physical-interface
where:
■ physical-interface is SYNn, ISDN-callname, ACC-callname,
MIOXn-circuitname, TNL-callname, TDM-groupname or ETHn-servicename.
For PPP over Ethernet, to specify that any service name is acceptable, use
the special service name ANY. Service names may be up to 18 characters in
length, and are usually supplied by the ISP providing the service.
There are many configurable parameters for PPP interfaces that you can
modify using the SET PPP command.
By default, Allied Telesyn routers and layer 3 switches use Link Quality Reporting
(LQR=ON) to determine link quality on PPP links. When connecting to some vendors’
routers it may be more suitable to turn LQR (link quality reporting) off on PPP links
(LQR=OFF), and instead use LCP Echo Request and Echo Reply messages to determine
link quality (ECHO=ON):
SET PPP=ppp-interface ECHO=ON LQR=OFF
For more information about PPP, see the Point to Point Protocol (PPP) chapter in
the AR400 Series Router Software Reference.
Dynamic PPP Interfaces and PPP Templates
A request from a lower layer (ISDN, ACC or L2TP) to create a new PPP
interface creates a Dynamic PPP interface. PPP templates are blueprints that
enable the full range of configuration options available on static PPP interfaces
to apply to dynamic PPP interfaces.
You can use a template to specify any of the parameters configurable on a static
PPP interface. Once a template is created, this template can be associated with
an ISDN, ACC or L2TP call.