HP MSR Router Series

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• HP recommends that you configure the dialer threshold, ppp mp max-bind, and ppp mp min-bind
commands on one end of the call. When the configured values are not the same on the two ends
of the call, the following values take effect:
{ The smaller threshold value.
{ The smaller upper limit of links.
{ The greater lower limit of links.
Configuration procedure
To configure MP for DDR:
Ste
p
Command Remarks
1. Enter system view.
system-view N/A
2. Configure the interval for DDR
to provide traffic statistics.
dialer flow-interval interval
The default is 20 seconds.
This command provides traffic
statistics on dialup links for MP.
3. Enter dialer interface view.
interface dialer number N/A
4. (Optional.) Set link load
thresholds.
dialer threshold traffic-percentage
[ in | in-out | out ]
By default, no load threshold is set.
5. (Optional.) Set the upper limit
of links in an MP bundle.
ppp mp max-bind max-bind-num
The default setting is 16.
For more information about this
command, see Layer 2—WAN
Access Configuration Guide.
6. (Optional.) Set the lower limit
of links in an MP bundle.
ppp mp min-bind min-bind-num
By default, the lower limit is 0, and
DDR brings up links depending on
traffic size.
For more information about this
command, see Layer 2—WAN
Access Configuration Guide.
Configuring PPP callback
PPP callback uses the client/server model where the calling party is the callback client and the called
party is the callback server. The client first originates a call, and the server decides whether to place a
return call. If a return call is needed, the callback server disconnects the call and places a return call
according to the username or callback number.
PPP callback has the following benefits:
• Enhanced security—The server places a return call to the locally configured number, which prevents
caller number spoofing.
• Reduced charges—The charge payer can be changed when the charge rates are different in the
two directions.
When you configure PPP callback on an interface, follow these restrictions and guidelines:
• PPP callback requires authentication. Configure PAP or CHAP authentication on both physical and
dialer interfaces on the callback client and server.