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Cisco 3825 Mobile Wireless Edge Router Software Configuration Guide
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Chapter 4 Configuring the Cisco 3825 Mobile Wireless Edge Router in a RAN-O Solution with the Command-Line
Configuration Sequence
• subslot—Subslot number identifying the controller that is the clock source.
• port—Port number identifying the controller that is the clock source.
For example, the following command specifies the clock source for E1, slot 0, subslot 0, port 0:
Router(config)# network-clock-select 1 e1 0/0/0
Configuring Multilink Backhaul Interface
A multilink interface is a special virtual interface that represents a multilink PPP bundle. The multilink
interface coordinates the configuration of the bundled link, and presents a single object for the aggregate
links. However, the individual PPP links that are aggregated must also be configured. Therefore, to
enable multilink PPP on multiple serial interfaces, you first need to set up the multilink interface, and
then configure each of the serial interfaces and add them to the same multilink interface.
Note In the following procedure, press the Return key after each step unless otherwise noted. At any time,
you can exit the privileged level and return to the user level by entering disable at the Router# prompt.
The Cisco 3825 router can support up to 16 E1 or T1 inte rfaces through the multilink interface.
Complete the following configuration tasks for a multilink backhaul interface.
• Creating a Multilink Bundle, this page
• Configuring PFC, page 4-16
• Configuring ACFC, page 4-17
• Enable Multilink and Identify the Multilink Interface, page 4-17
• Enable Real-Time Transport Protocol (RTP) Header-Compression, page 4-18

Creating a Multilink Bundle

To create a multilink bundle, follow these steps, while in the global configuration mode:
Step 1 Create a multilink bundle and enter the interface configuration mode:
Router(config)# interface multilink
group-number
Where group-number is the number of the multilink bundle.
For example, the following command creates a multilink bundle 5:
Router(config)# interface multilink5
Router(config-if)#
To remove a multilink bundle, use the no form of this command.
Note To see a list of the configuration commands available to you, enter ? at the prompt or press the
Help key while in the configuration mode.