3Com Router User Manual

Configuring DCC 727
Ta b l e 763   Implement ISDN Caller Identification Callback (Client Configuration) in 
Resource-Shared DCC
To configure the ISDN caller identification callback server in the resource-shared 
DCC implementation, perform the following configuration in dialer interface view.
Ta b l e 764   Implement ISDN Caller Identification Callback (Server Configuration) in 
Resource-Shared DCC 
By default, callback according to ISDN caller identification is not configured.
A dialer number should be...

728CHAPTER 51: CONFIGURING DCC
do not automatically disconnect due to timeout. In other words, the dialer 
timer idle 
command does not take effect on auto-dial.
Perform the following configuration in dial interface (physical or dialer interface) 
view.
Ta b l e 766   Configure Auto-Dial
By default, auto-dial is not configured. If auto-dial function is enabled, the interval 
for auto-dial defaults to 300 seconds.
Configuring dialer number circular standby
This function can only be used with circular DCC....

Configuring DCC 729
idle time, no the packet which complies with the “permit” statements are 
transmitted over the line.
Perform the following configuration in dial interface (physical or dialer interface) 
view.
Ta b l e 768   Configure the Link Idle Time
By default, the link idle time is 120 seconds.
Configuring the link disconnection time before initiating the next call
After a line for DCC calls enters the down status due to faults or disconnection, a 
specified period of time must be elapsed (the...

730CHAPTER 51: CONFIGURING DCC
Configuring the timeout of call setting up
When placing DCC calls to some remote ends, the intervals between originating 
the calls and establishing the connections are not the same. To effectively control 
the time that should wait for the connection after a call is originated, the user can 
configure the wait-carrier timer to specify a duration, after which DCC will 
terminate the call if the connection cannot be established.
Perform the following configuration in dial...

DCC Configuration Examples731
DCC Configuration 
Examples
DCC Applications in 
Common UseRouterA can call RouterB and RouterC via multiple interfaces. Likewise, RouterB 
and RouterC can respectively call RouterA. However, RouterB and RouterC cannot 
call each other.
As shown in Figure 233, when circular DCC is used, the addresses of RouterA, 
RouterB and RouterC are on the same segment. In this case, 100.1.1.1, 100.1.1.2, 
and 100.1.1.3 are the addresses respectively for RouterA, RouterB and RouterC....

732CHAPTER 51: CONFIGURING DCC
[Router-Serial0] dialer circular-group 0
[Router-Serial0] interface serial 1
[Router-Serial1] physical-mode async
[Router-Serial1] modem
[Router-Serial1] dialer circular-group 0
2Configure RouterB:
[Router] dialer-rule 1 ip permit
[Router] interface serial 0
[Router-Serial0] physical-mode async
[Router-Serial0] modem
[Router-Serial0] ip address 100.1.1.2 255.255.255.0
[Router-Serial0] dialer enable-circular
[Router-Serial0] dialer-group 1
[Router-Serial0] dialer route ip...

DCC Configuration Examples733
[Router-Serial0] dialer bundle-member 1
[Router-Serial0] dialer bundle-member 2
[Router-Serial0] link-protocol ppp
[Router-Serial0] ppp authentication-mode pap
[Router-Serial0] ppp pap local-user usera password simple usera
[Router-Serial0] interface serial 1
[Router-Serial1] physical-mode async
[Router-Serial1] modem
[Router-Serial1] dialer bundle-member 1
[Router-Serial1] dialer bundle-member 2
[Router-Serial1] link-protocol ppp
[Router-Serial1] ppp authentication-mode...

734CHAPTER 51: CONFIGURING DCC
 Solution 3: 
Establish a connection via ISDN BRI or PRI interfaces by using Circular DCC, and 
configure the DCC parameters on the physical interfaces.
1Configure RouterA:
[Router] dialer-rule 1 ip permit
[Router] interface bri 0
[Router-Bri0] ip address 100.1.1.1 255.255.255.0
[Router-Bri0] dialer enable-circular
[Router-Bri0] dialer-group 1
[Router-Bri0] dialer route ip 100.1.1.2 8810052
[Router-Bri0] dialer route ip 100.1.1.3 8810063
2Configure RouterB:
[Router]...

DCC Configuration Examples735
[Router-Bri0] dialer bundle-member 1
[Router-Bri0] dialer bundle-member 2
[Router-Bri0] link-protocol ppp
[Router-Bri0] ppp authentication-mode pap
2Configure RouterB:
[Router] dialer-rule 2 ip permit
[Router] local-user usera password simple usera
[Router] interface dialer 0
[Router-Dialer0] ip address 100.1.1.2 255.255.255.0
[Router-Dialer0] undo dialer enable-circular
[Router-Dialer0] dialer bundle 1
[Router-Dialer0] dialer number 8810148
[Router-Dialer0] dialer user...

736CHAPTER 51: CONFIGURING DCC
Figure 234   Network for the DCC application providing MP binding
1Configure RouterA:
[Router] dialer-rule 1 ip permit
[Router] local-user userb password simple userb
[Router] flow-interval 3
[Router] interface dialer 0
[Router-Dialer0] ip address 100.1.1.1 255.255.255.0
[Router-Dialer0] undo dialer enable-circular
[Router-Dialer0] dialer bundle 1
[Router-Dialer0] ppp mp
[Router-Dialer0] dialer threshold 50
[Router-Dialer0] dialer user userb
[Router-Dialer0] dialer-group 1...