3Com 10014299 manual Router-Serial0dialer route ip 100.1.1.2, Router-Serial1dialer enable-circular

738CHAPTER 51: CONFIGURING DCC

callback servers. RouterA and RouterC use the same address 100.1.1.1, whereas RouterB and RouterD use the same address 100.1.1.2.

Figure 236 Network for the DCC application providing router-to-router callback

	Serial0	8810048	8810052	Serial1
Router A	Modem		PSTN	Modem	Router B
	Callback Client	Networking for PPP callback			Callback Server
	Bri0			Bri1

Router C	NT1
	Callback Client

8810148	ISDN	8810152
		NT1
			Router D
Networking for ISDN caller ID callback			Callback Server

Solution 1:

Use Circular DCC to implement PPP callback. The server determines whether to originate a return call to a client according to the user names configured in the dialer routes.

1Configure RouterA:

[Router] dialer-rule 1 ip permit

[Router] interface serial 0

[Router-Serial0]ip address 100.1.1.1 255.255.255.0

[Router-Serial0]physical-mode async

[Router-Serial0] modem

[Router-Serial0]dialer enable-circular

[Router-Serial0] dialer-group 1

[Router-Serial0]dialer route ip 100.1.1.2 8810052

[Router-Serial0] link-protocol ppp

[Router-Serial0]ppp pap local-user usera password simple usera

[Router-Serial0]ppp callback client

2Configure RouterB:

[Router] dialer-rule 2 ip permit

[Router] local-user usera password simple usera

[Router] interface serial 1

[Router-Serial1]ip address 100.1.1.2 255.255.255.0

[Router-Serial1]physical-mode async

[Router-Serial1] modem

[Router-Serial1]dialer enable-circular

[Router-Serial1] dialer-group 2

[Router-Serial1]dialer route ip 100.1.1.1 user usera 8810048

[Router-Serial1]dialer callback-center user

[Router-Serial1] link-protocol ppp

[Router-Serial1]ppp authentication-mode pap

[Router-Serial1]ppp callback server

Solution 2:

Use Circular DCC to implement PPP callback. The server dynamically creates dialer routes and originates return calls to the clients according to the dialer numbers.

1Configure RouterA:

[Router] dialer-rule 1 ip permit

[Router] interface serial 0