System information

Chapter 3 Initially Configuring the ATM Switch Router
Configuring Network Clocking
3-13
ATM Switch Router Software Configuration Guide
78-6277-03, Cisco IOS Release 12.0(13)W5(19)
Example
The following example configures ATM interface 3/0/0 to receive its transmit clocking from a
network-derived source:
Switch(config)# interface atm 3/0/0
Switch(config-if)# clock source network-derived
Displaying the Network Clocking Configuration
To show the switch’s network clocking configuration, use the following privileged EXEC commands:
Examples
The following example shows the configured network clock sources on a Catalyst 8510 MSR or
LightStream 1010:
Switch# show network-clocks
clock configuration is NON-Revertive
Priority 1 clock source: ATM1/0/0
Priority 2 clock source: ATM1/1/0
Priority 3 clock source: No clock
Priority 4 clock source: No clock
Priority 5 clock source: System clock
Current clock source:System clock, priority:5
Note A source listed as “No clock” indicates that no clock source configured at that priority.
The following example shows the switch clock source configuration with the network clock module
installed:
Switch# show network-clocks
Network clocking information:
---------------------------------------
Source switchover mode: revertive
Netclkd state: Active
Source selection method: provisioned
NCLKM hardware status: installed & usable
NCLKM status: software enabled
Primary clock source: ATM0/0/0
Secondary clock source: not configured
Present clock source: NCLKM Stratum 3 osc (0)
The following example shows the clock source configuration stored in the running configuration:
Switch# more system:running-config
!
<information deleted>
!
network-clock-select revertive
network-clock-select 1 ATM0/0/0
<information deleted>
Command Purpose
show network-clocks Shows the network clocking configuration.
more system:running-config Shows the interface clock source configuration.
show controllers [atm card/subcard/port] Shows the interface controller status.