Configuring Dial-Up Backup To The Adsl - 3Com 3C13636 Configuration Manual

3Com Router 3000 Ethernet Family
Configuration Guide

2.4.3 Configuring Dial-up Backup to the ADSL

I. Network requirements
Connect Router A to the Internet through an ADSL link and back up the link with a
common dial-up link, allowing the router to connect to the Internet through PSTN by
placing PPP calls when the ADSL link fails.
II. Network diagram
RouterA
Figure 2-1 Network diagram for configuring dial-up backup to the ADSL
III. Configuration procedure
Configure Router A:
# Configure a dialer interface.
[3Com] dialer-rule 1 ip permit
[3Com] interface dialer 1
[3Com-Dialer1] dialer user 3Com
[3Com-Dialer1] dialer-group 1
[3Com-Dialer1] dialer bundle 1
[3Com-Dialer1] ip address ppp-negotiate
[3Com-Dialer1] standby interface analogmodem 1/0/0
# Configure a virtual Ethernet interface.
[3Com-Dialer1]interface virtual-ethernet 1
[3Com-Virtual-Ethernet1] mac 0001-0002-0003
[3Com-Virtual-Ethernet1] quit
[3Com] interface atm 0/0/0
[3Com-atm1/0/0] pvc to_adsl_a 0/60
[3Com-atm-pvc-atm0/0/0-0/60-to_adsl_a] map bridge virtual-ethernet 1
[3Com-atm-pvc-atm0/0/0-0/60-to_adsl_a] quit
# Configure a PPPoE session.
[3Com-atm1/0/0] virtual-ethernet 1
[3Com-virtual-Ethernet1] pppoe-client dial-bundle-number 1 idle-timeout 120
# Configure the AM interface.
[3Com-virtual-Ethernet1] interface analogmodem 1/0/0
[3Com-analogmodem 1/0/0] link-protocol ppp
[3Com-analogmodem 1/0/0] ip address ppp-negotiate
ADSL0/0/0
Internet
AM1/0/0
3Com Corporation
Chapter 2 Backup Center Configurations
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