3Com MSR 50 Series, Configuration Manual

Page: 172 / 2443

172 C
HAPTER
6: DCC C
ONFIGURATION
service-type ppp command. You need to select either approach with the dialer
callback-center command.
You need to configure callback client usernames with the dialer route command,
so that the callback server can authenticate whether a callback client is valid when
receiving a call from it.
Follow these steps to configure PPP callback server in the C-DCC implementation:
n
■
If the network address used by a callback client is dynamically assigned,
configuring the
dialer route command to associate the callback dial string
with the network address for the client may result in callback failure. In this
case, you should use the
service-type ppp command instead to associate the
dial string with the client username for callback.
■
To leave enough time for a server to call back, the interval between two calls
on the client need to be at least 10 seconds longer than that of the server. It is
recommended that the interval on the server be set to 5 seconds (the default)
and that on the client be set to 15 seconds.
To do... Use the command... Remarks
Enter system view system-view --
Enter dialer interface view interface dialer number --
Enable PPP callback server ppp callback server Required
Disabled by default.
Configure the PPP callback reference dialer callback-center
[ user | dial-number ] *
Required
Add a callback client username dialer route protocol
next-hop-address [ mask
network-mask-length ]
user hostname
[ broadcast ]
[ dial-number [ autodial |
interface interface-type
interface-number ] * ]
Required
Exit to system view quit --
Configure either
command
depending on
the keyword
configured with
the
dialer
callback-center
command
If the
dial-number
keyword is
configured, create
and enter local
user view to
configure a
callback user and
the dial string for
callback
local-user user-name
service-type ppp
[ callback-nocheck |
callback-number
callback-number |
call-number call-number
[ subcall-number ] ]
Required
If the user
keyword is
configured,
configure a dial
string for callback
dialer route protocol
next-hop-address [ mask
network-mask-length ]
user hostname
[ broadcast ] dial-number
[ autodial | interface
interface-type
interface-number
] *