Cisco Systems 3825 manual To go to the redundancy mode, enter the redundancy command

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-redundancycommand:

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 “Configuring 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 Step 1.

	Cisco 3825 Mobile Wireless Edge Router Software Configuration Guide
OL-15667-03		4-29