Cisco 3825 User Manual
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Cisco 3825 Mobile Wireless Edge Router Software Configuration Guide
OL-15667-03
Chapter 4 Configuring the Cisco 3825 Mobile Wireless Edge Router in a RAN-O Solution with the Command-Line
Configuration Sequence
To configure a Cisco 3825 router for use in a redundant configuration, follow these steps while in the
global configuration mode:
Step 1
First configure the shorthaul loopback interfaces (loopback 103).
Note
The loopback interface is software-only, virtual interface that emulates an interface that is
always up. The interface number is the number of the loopback interface that you want to create
or configure.
Router(config)# interface loopback
interface
For example, the following command specifies the loopback interface for shorthaul as 103:
Router(config)# interface loopback Loopback103
Step 2
Enter the ip address and subnet mask for the shorthall loopback interface:
Router (config-if)# ip address
ip_address subnet_mask
Step 3
Exit the interface configuration mode.
Router (config-if)# exit
Step 4
To go to the redundancy mode, enter the redundancy command:
Router(config)# redundancy
Step 5
In the redundancy mode, enter the y-cable mode:
Router(config-r)# mode y-cable
Step 6
To enable the GSM redundancy, enter the standby gsm-redundancy command:
Router(config-r)# standby gsm-redundancy
Step 7
Specify the interface to be used for backhauling.
Router(config-r-y)# standby use-interface
interface backhaul
Note
The interface that you specify for the backhaul must be a Multi-Link Point-to-Point Protocol
(MLPPP) interface. If you want to use a serial interface as the backhaul, you must first configure
that interface to be part of an MLPPP bundle. The interface that you specify for the backhaul
interface should match one of those that you configured and tracked in the
Multilink Backhaul Interface” section on page 4-15
.
For example, the following command specifies the multilink interface for backhaul:
Router(config-r-y)# standby use-interface Multilink5 backhaul
Step 8
Specify the interface to be used for shorthaul.
Router(config-r-y)# standby use-interface
interface shorthaul
Note
The interface that you specify for the shorthaul interface should match the one that you
configured in the