Dynamic Routing Standby Configuration Example Iii - 3Com 3C13636 Configuration Manual

3Com Router 3000 Ethernet Family
Configuration Guide
[3Com-Loopback0] ip address 40.0.0.1 255.0.0.0
# Enable OSPF.
[3Com] ospf
[3Com-ospf-1] area 0
[3Com-ospf-1-area-0.0.0.0] network 10.0.0.0 0.0.0.255
[3Com-ospf-1-area-0.0.0.0] network 20.0.0.0 0.0.0.255
[3Com-ospf-1-area-0.0.0.0] network 40.0.0.0 0.0.0.255

2.3.3 Dynamic Routing Standby Configuration Example III

I. Network requirements
Router A and Router B are connected across an X.25 network.
At the same time, for dial-up backup, they are connected to an ISDN network each by
using an ISDN BRI interface on which two B channels are bundled. The two routers can
dial to reach each other through RS-DCC.
In dynamic routing standby, Router A is working as the control device to monitor the
route destined for the network segment 30.0.0.0 on Router B.
In normal cases, Router A and Router B communicate through X.25, the primary link.
When the route to the monitored network segment goes down, for example, because
fault occurs on the X.25 network, Router A brings up the ISDN BRI link automatically.
II. Network diagram
s1/0/0:10.0.0.1/8
bri0/0/0:20.0.0.1/24
Router A
Figure 2-3 Network diagram for dynamic routing standby
III. Configuration procedure
1) Configure Router A
# Configure a dial-up ACL and add a local user.
[3Com] dialer-rule 1 ip permit
[3Com] local-user userb
[3Com-luser-userb] password simple userb
[3Com-luser-userb] service-type ppp
[3Com-luser-userb] quit
# Configure a dynamic routing standby group and add the to-be-monitored network
segment to it.
X.25
8810010
ISDN BRI line
3Com Corporation
Chapter 2 Dynamic Routing Standby
s1/0/0:10.0.0.2/8
8810052
bri0/0/0:20.0.0.2/24
RouterB
2-9
30.0.0.0