Cisco 3825 - Manual (Page 72)

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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
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-participate command 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-select command 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.