3Com 10014299 manual DCC Configuration Examples, Solution, DCC Applications in Common Use

DCC Configuration Examples 731

DCC Configuration Examples

DCC Applications in Common Use

RouterA 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. When resource-shared DCC are used, the addresses of RouterA and RouterB are on the same segment, so are the addresses of RouterA and RouterC. The addresses of the interfaces Dialer0 and Dialer1 on RouterA are respectively

100.1.1.1and 122.1.1.1. The address of the Dialer0 on RouterB is 100.1.1.2, and that of the Dialer0 on RouterC is 122.1.1.2.

Figure 233 Network of a DCC application in common use

			Serial0
Serial0	8810048	8810052
	Modem	Modem	Router B
		PSTN
			Serial0

Router A		8810049	8810063
Serial1	Modem		Modem

Connecting via serial interfaces across PSTN

	Bri0	8810152
		8810148	NT1
	NT1	ISDN
		8810163
Router D			NT1
	Connecting via ISDN BRI or PRI interfaces across ISDN

Router C

Bri0

Router E

Bri0

Router F

Solution 1

Establish a connection via the serial interface by using Circular DCC, configure the DCC parameters on the dialer interface for RouterA with the help of a dialer circular group, and directly configure the DCC parameters on the physical interfaces on RouterB and RouterC.

1Configure RouterA:

[Router] dialer-rule 1 ip permit

[Router] interface dialer 0

[Router-Dialer0]ip address 100.1.1.1 255.255.255.0

[Router-Dialer0]dialer enable-circular

[Router-Dialer0] dialer-group 1

[Router-Dialer0]dialer route ip 100.1.1.2 8810052

[Router-Dialer0]dialer route ip 100.1.1.3 8810063

[Router-Dialer0]interface serial 0

[Router-Serial0]physical-mode async

[Router-Serial0] modem