
Customizing Demand Circuits
308621-14.00 Rev 00
12-27
Using the BCC
Configuring a Hot Standby Circuit
Hot standby circuits act as alternate paths for failed leased circuits. A leased
circuit that uses a hot standby circuit is referred to as a primary circuit.
To configure a hot standby circuit, you assign a PPP demand circuit to a
configured primary circuit using the
hot-standby
command. This command
designates the demand circuit as a hot standby circuit.
To configure a hot standby circuit for a primary circuit, do the following:
1.
Configure a primary circuit.
Hot standby circuits can support the following types of primary circuits:
• Single leased PPP circuit
• Single leased Nortel Networks Standard circuit
• PPP multilink circuit (Site Manager configurable only)
• PPP multiline circuit (Site Manager configurable only)
• Frame relay primary circuit with a direct mode PVC
2.
Create a PPP demand circuit configuration that includes an IP circuit, user
authentication information, and an outgoing phone number. In addition,
ensure its
connection-mode
is set to the default, collision-master.
3.
Navigate to the primary circuit prompt and enter:
hot-standby
<demand_circuit_name>
demand_circuit_name
is the name of the configured demand circuit.
For example, to make the demand circuit to-dallas a hot standby circuit for the
frame relay primary circuit centralbln, enter:
service/centralbln#
hot-standby to-dallas
The demand circuit to-dallas is now a hot standby circuit. If the primary frame
relay connection fails, the router activates the circuit to-dallas to continue the
transmission of data.
4.
Go to the next section, “Configuring a Normal Standby Circuit” to configure
the other side of the standby connection.
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