3Com Router User Manual

Configuring DCC 717
By default, circular DCC is enabled on ISDN BRI and PRI interfaces, but disabled on 
other interfaces (serial, asynchronous, AUX, etc.) and the user should manually 
configure the 
dialer enable-circular command. In addition, when no dialer 
interface is created, the physical interface does not belong to any dialer circular 
group, and the default priority is assigned to physical interface 1, and this is added 
to a dialer circular group.
Configuring multiple interfaces to receive...

718CHAPTER 51: CONFIGURING DCC
Configuring 
Resource-Shared DCCEach RS-attribute set consists of a dialer interface, the attributes of the interface, 
and a dialer bundle. Specifically, 
■Only one dialer number can be defined for a dialer interface. Since this dialer 
number has its own dial attributes set, all the calls originated by dialing this 
number can use the same DCC attribute parameters (such as dialing rate).
■Each dialer interface can use only one dialer bundle, which contains multiple...

Configuring DCC 719
■Configuring dialing authentication for resource-shared DCC
Enabing Resource-Shared DCC
Before enabling the resource-shared DCC, please use the command undo dialer 
enable-circular 
to disable circular DCC first, then enable the resource-shared 
DCC by using 
dialer bundle command.
Perform the following configuration in dialer interface view.
Ta b l e 751   Enable Resource-Shared DCC
By default, circular DCC has been enabled on ISDN BRI and PRI interfaces, so you 
need to configure...

720CHAPTER 51: CONFIGURING DCC
Ta b l e 753   Create a Dialer Bundle and Assigning the Physical Interfaces to it
By default, no dialer bundle is created, and the physical interfaces do not belong 
to any dialer bundle. If a physical interface is assigned to a dialer bundle, a default 
priority of 1 is assigned. 
Configuring dialing authentication for resource-shared DCC
To implement the resource-shared DCC, the called party must identify the calling 
parties through authentication through the...

Configuring DCC 721
Configuring MP Binding 
for DCCIn DCC applications, the user can configure a traffic threshold for links. Setting the 
traffic threshold to 0 means that the max bandwidth of all the channels is enabled 
and there is no flow control. If the traffic threshold is in the range 1 to 100, MP 
binding will adjust the allocated bandwidth by the actual traffic percentage. 
Specifically, if the percentage of the actual traffic on a link to the bandwidth 
exceeds the defined traffic threshold,...

722CHAPTER 51: CONFIGURING DCC
Configuring MP binding in resource-shared DCC
If an interface is a serial, asynchronous interface or an AUX interface, then the 
resource-shared DCC will enable another physical interface in the dialer bundle of 
the dialer interface whenever the percentage of traffic on the physical interface to 
the bandwidth exceeds the traffic threshold. At the same time, it implements MP 
binding on these links. If the physical interface is an ISDN BRI or PRI interface, the...

Configuring DCC 723
Ta b l e 757   Implement PPP Callback (Client Configuration) in Circular DCC 
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...

724CHAPTER 51: CONFIGURING DCC
By default, the system does not enable the callback function. Once it is enabled, 
the server will originate return calls according to the user name configured in the 
dialer route command.
If the callback client adopts the dynamically assigned network address, the server 
will be unable to use the dialer route command to configure a callback dial 
number to associate with the network address. In this case, the callback client can 
only use the 
local-user callback-number...

Configuring DCC 725
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 resource-shared DCC implementation
When resource-shared DCC are adopted to implement PPP callback, the PPP 
authentication configuration at server end is the same as that of circular DCC, 
except that the server in the resource-shared DCC implementation can only 
originate a return call according to the dial number...

726CHAPTER 51: CONFIGURING DCC
■Secondary rule: The best match is the one that is found first.
Confirm which dialer call-in at server end is associated with the incoming call
■In circular DCC, upon receiving an incoming call, the server searches for the 
dialer call-in matching the incoming number in the 
dialer call-in 
commands configured on the physical interface or the dialer interface to which 
the physical interfaces belongs.
■In resource-shared DCC, upon receiving an incoming call, the server...