3com 3031 Instruccion De Instalación

By default, Circular DCC is enabled on ISDN PRI interfaces, but disabled on other 
interfaces (serial, asynchronous, AUX, etc.) and the user should manually 
configure the 

 command. No authentication parameters 

or dial-in user information are configured by default.

Perform the following configuration steps after the basic DCC configuration is 
implemented. As shown in the following figure, multiple local interfaces originate 
calls to multiple remote ends (the picture components of inverse color represent 
the routers irrelevant with the networking):

Figure 264   Multiple interfaces placing calls to multiple remote ends

As shown in Figure 264, the local interfaces interface0 (if0), if1, and if2 originate 
DCC calls to the remote interfaces if1, if2 and if3. For allowing calls to multiple 
remote ends, the user must use the 

 command to configure the 

dialer strings and destination addresses. For the calls to originate from multiple 
interfaces, the dialer circular group must be used to configure DCC. The user can 
select to configure either PAP or CHAP authentication.

Instead of using their own IP addresses, the physical interfaces in the dialer circular 
group will use the IP address of the dialer interface in making the calls. The 
argument 

 of the 

 

 command configured 

in physical interface view must be the same as the 

 used in the 

 

 command configured in the view of the dialer interface to properly 

associate the physical interface. ISDN PRI interface is regarded as the dialer circular 
group for its own B channels. At the same time, they can be the physical interfaces 
in other dialer circular groups.

Use the 

command to create a dialer interface in system view, 

add a physical interface to the specified dialer circular group through the 

 command in interface view, and perform other configuration 

processes in dialer interface view.

Table 1117   Configuring multiple local interfaces to originate calls to multiple remote ends

Enable Circular DCC

Configure the destination 
address(es) and the dialer number(s) 
for calling one (or more) remote 
end(s).

dial-number 

Delete the destination address(es) 
and dialer number(s) for calling one 
(or more) remote ends.

Router

Remote end C

Single/Multiple interface(s)

Local end

(Multiple interfaces)

Remote end B

Single/Multiple interface(s)

Remote end A

Single/Multiple interface(s)

if0

if1

if2

if1

if2

if3

Router

Router

Router