Cisco Systems 3825 manual Configuring Network Clocking Support

Chapter 4 Configuring the Cisco 3825 Mobile Wireless Edge Router in a RAN-O Solution with the Command-Line

Configuration Sequence

Step 10 Return to Step 1 to configure the second port on the Cisco 2-port T1/E1-RAN interface card and the ports on any additional Cisco 2-port T1/E1-RAN interface cards.

Step 11 Exit to the global configuration mode.

Router(config-if)# exit

Configuring Network Clocking Support

To allow the ports on the Cisco 2-port T1/E1-RAN interface card to use the network clock for timing, use the network-clock-participatecommand in the global configuration mode. To restrict the device to use only its own clock signals, use the no form of this command.

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.

To configure the Cisco 2-port T1/E1-RAN interface card, follow these steps, while in the global configuration mode:

Step 1 Continuing with configuration of the E1, configure the network clock timing by entering:

Router(config)# network-clock-participate [wic aim slot wic-slot]

Where:

•wic wic-slot—Configures the Cisco 2-port T1/E1-RAN interface card slot number on the Cisco 3825 router. Valid values are 0 or 1.

•aim—Configures the Advanced Integration Module (AIM) for Asynchronous Transfer Mode (ATM) (AIM-ATM or AIM-ATM-8) daughter card built-in on the motherboard of the Cisco 3825 router.

•slot—Configures the NM-2W network interface module in the network module slot located on the Cisco 3825 router.

For example, the following command configures the Cisco 2-port T1/E1-RAN interface card to use the network clock on the 2-port T1/E1-RAN in the router chassis in slot 0:

Router(config)# network-clock-participate wic 0

Step 2 To name a source to provide timing for the network clock and to specify the selection priority for this clock source, use the network-clock-selectcommand in global configuration mode. To cancel the network clock selection, use the no form of this command.

Step 3 To specify the selection priority for the clock source, enter:

Router(config)# network-clock-select priority {e1} slot/subslot/port

Where:

•priority—Selection priority for the clock source (1 is the highest priority). The clock with the highest priority is selected to drive the system time-division multiplexing (TDM) clocks. When the higher-priority clock source fails, the next-higher-priority clock source is selected.

•e1—Specifies that the slot is configured as E1.

•slot—Slot number identifying the controller that is the clock source.

	Cisco 3825 Mobile Wireless Edge Router Software Configuration Guide
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