3Com 3C13636 Configuration Manual page 1468

3Com Router 3000 Ethernet Family
Configuration Guide
Note:
The IP address configured in the standby routing-rule command is used for dialer
route lookup. You must make sure that this IP address is the one configured in the
corresponding dialer route command.
You may use the standby routing-rule command in the following two ways:
Create multiple dynamic routing standby groups, each monitoring a network
segment. In case no valid route is available with a network segment, the system
attempts to dial a backup link. On the dial-up interface, link establishment and
disconnection are independent among monitored network segments.
Create one dynamic routing standby group which monitors multiple segments.
The system attempts to dial a backup link only when none of these monitored
network segments has a valid route. When doing this, the system looks up the
dialer-route logical channels configured for the monitored network segments and
uses the one found first to dial. In this case, you can only connect one link. In
addition, to ensure reachability of all the monitored network segments, you must
enable dynamic routing.
II. Applying a dynamic routing standby group onto a secondary interface
Before enabling dynamic routing standby on a secondary interface, make sure that you
have configured legacy DCC on it.
Perform the following configuration in dial interface view.
Table 2-2 Apply a dynamic routing group onto the secondary interface
Apply a dynamic routing standby group
onto the secondary interface
Remove the dynamic routing standby
group from the secondary interface
By default, dynamic routing standby is disabled.
Note:
A dial interface refers to a physical dial interface such as PRI and BRI, or a logical dial
interface, that is, dialer interface.
Operation
3Com Corporation
2-3
Chapter 2 Dynamic Routing Standby
Command
standby routing-group group-number
undo standby
group-number
routing-group