Chapter 11: AI2524 Sync PPP Configuration Steps
August 1997 Page 11-13
2524UM
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
Configure PPP Callback PPP callback 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 na me and dial
string authentication information to determine whether to place a re-
turn call. If the authentication is successful, the ca llback s erver 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), n o retry occurs. I f th e cal lb ack s er ver h as
no interface available when attempting the return call, it
does not retry.