3Com 10014299 manual Dial Number Circular Standby and Internet Access for DCC, Solution

742CHAPTER 51: CONFIGURING DCC

Dial Number Circular

Standby and Internet

Access for DCC

In PSTN, the dial number circular standby is fulfilled through configuring the dialer route command at the dialing side. The access side provides the accessing service for DCC via the asynchronous serial interface, and adopts the PAP authentication to authenticate the validity of the dialing party. In ISDN, single dialer number and CHAP authentication are adopted, and other configurations are similar to the PSTN side.

As shown in the following figure, RouterB and RouterD work as access server, RouterA and RouterC at the dialing side accept the negotiated addresses assigned by the remote ends. The address pool for allocation is in the range of 100.1.1.1 to

100.1.1.16.RouterB and RouterD use the address 100.1.1.254, and obtain the dialer numbers 8810048 to 8810055 from the telecommunications service provider. ISDN dial number is 8810148, which provides services for 16 network users.

Figure 239 Network for the DCC application providing dial number circular standby and accessing service

			8810048
	Serial0		Modem
			8810049
	Modem		Modem
Router A			8810050	Async0 to
	Serial0
			Modem
				Async7
			8810051
		PSTN
	Modem		Modem	Internet
Router			8810052	Router B
……
			Modem
			8810053
	Modem		Modem
			8810054
PC			Modem
			8810055

Provide accessing service on asynchronousModem interfaces

	Bri0
Router C	NT1

NT1

Router

	Serial2:15
ISDN	8810148	Internet
	Router D

Provide accessing services on ISDN PRI interface

Solution 1:

Configure dial number circular standby on the dialing parties, adopt Circular DCC to set up connections on the 8 asynchronous serial interfaces at the access side, and configure the DCC parameters on the dialer interfaces.

1Configure RouterA:

[Router] dialer-rule 1 ip permit

[Router] local-user userb password simple passb

[Router] interface serial 0

[Router-Serial0]physical-mode async

[Router-Serial0] modem