AIS AI2524 user manual Configure PPP Callback, Interface async number, Does not retry

Chapter 11: AI2524 Sync PPP Configuration Steps

Configure PPP Callback

zCreate one or more local IP address pools.

ip local pool {default poolname { begin- ip-address-range[end-ip-address-range]}}

z(Optional) Enter interface configuration mode.

interface async number

z(Optional) If you want an interface to use an address pool other than default, specify which pool each interface uses.

peer default ip address pool poolname

PPPcallback provides a client-server relationship between the end points of a point-to-point connection. PPP callback allows a router to request that a dial-up peer router call back. The callback feature can be used to control access and toll costs between the routers.

When PPP callback is configured on the participating routers, the call- ing router (the callback client) passes authentication information to th remote router (the callback server), which uses the host name and dial string authentication information to determine whether to place a re- turn call. If the authentication is successful, the callback server discon- nects and then places a return call. The remote username of the return call is used to associate it with the initial call so that packets can b transmitted.

Both routers on a point-to-point link must be configured for PPP call- back; one must function as a callback client and one must be config- ured as a callback server. The callback client must be configured to initiate PPP callback, and the callback server must be configured to ac- cept PPP callback.

This feature implements these callback specifications of RFC 1570:

zFor the client. Option 0, location is determined by user authentica- tion

zFor the server. Option 0, location is determined by user authenti- cation; Option 1, dialing string; and Option 3, E.164 number.

Return calls are made through the same dialer rotary group but not necessarily the same line as the initial call.

Note:	If the return call fails (because the line is not answered or
	the line is busy), no retry occurs. If the callback server has
	no interface available when attempting the return call, it
	does not retry.

August 1997	Page 11-13
2524UM