3Com 10014299 manual Implement PPP Callback Client Configuration in Circular DCC

	Configuring DCC 723
Table 757 Implement PPP Callback (Client Configuration) in Circular DCC
Operation	Command
Configure PPP encapsulation	link-protocol ppp
Configure the local end to send the user	ppp pap local-user username password
name and password for PAP	{ cipher simple } password
authentication
Configure the local user name sent to the	ppp chap user username
remote end for CHAP authentication
Configure the password that the local end	ppp chap password { cipher simple }
will send to the remote end for CHAP	password
authentication
Configure the user name and password	local-user username password { cipher
that the remote end is allowed to dial in	simple } password
Configure the local end to be the PPP	ppp callback client
callback client
Disable the local end to be the PPP	undo ppp callback client
callback client
Configure the destination addresses and	dialer route protocol
dial number(s) for calling one (or more)	next-hop-address dial-number
remote ends
Configure the dial number for a Windows	ppp callback ntstring dial-number
NT server to originate return calls to the
router
Delete the dial number that a Windows	undo ppp callback ntstring
NT server needs for placing return calls to
the router

By default, the system does not enable callback function and is not configured with any Windows NT server callback dial number.

2Configure the PPP callback server in the circular DCC implementation

The callback server can originate a return call according to either the network address configured in the dialer route command (PPP authentication must be configured in this case), or the dial number configured in the local-usercallback-numbercommand. Therefore, the user must configure either method in the dialer callback-centercommand for placing the return call.

The user should configure the callback client user name in the dialer route command, so that the callback server can authenticate whether a calling party is a legal callback user when receiving its call requesting callback.

Use the local-usercallback-numbercommand to configure the callback user and callback dial number in system view, and perform other configurations in dial interface (physical or dialer interface) view.

Table 758 Implement PPP Callback (Server Configuration) in Circular DCC

Operation	Command
Configure PPP encapsulation	link-protocol ppp
Configure an authentication mode	ppp authentication-mode { pap chap
	}
Configure the user name that the local	ppp chap user username
end will send to the remote end for CHAP
authentication
Configure the password that the local end	ppp chap password { cipher simple }
will send to the remote end for CHAP	password
authentication