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clock source
controller sonet
Select an interface on which you want to configure SONET or SDH.
Specify the type of interface: SONET or SDH.
Specify a clock source for the interface.
(Optional) Assign a text description or an alias to the interface.
Disable processing of SNMP link status information for the section and line layers
of the interface.
Enable processing of SNMP link status information for the path layer of the
interface.
(Not recommended) Overwrite the automatic setting for the path signal label
(C2) byte.
Configure the router to use remote defect indications (RDIs) at the path layer to
determine the operational status of a path.
(MPLS fast reroute over SONET/SDH interfaces) Specify the time that the router
waits to set an alarm when the router records a defect at the path layer.
(MPLS fast reroute over SONET/SDH interfaces) Specify the time that the router
waits to set an alarm when the router records a defect at the line or section layer.
Shut down (disable) an interface.
Use to configure the transmit clock source for the interface.
In most cases, accept the default option, line. This setting allows the interface
to derive the transmit clock from the received clock. In certain circumstances,
it might be appropriate to generate a clock from one of the internal sources
(options module or chassis).
Specify the keyword line to use a transmit clock on the line's receive data stream.
Specify the keywords internal module to use the line module's internal clock.
Specify the keywords internal chassis to use the router's clock.
On a cOC3/STM1 I/O module, you can configure some ports with internal clock
sources and others with line clock sources. However, all ports with internal clock
sources must use either the router's clock or the module's clock. You cannot
configure some ports on the I/O module to use the router's clock and others to
use the module's clock.
To change the clock source of the ports on a cOC3/STM1 I/O module from the
router's clock to the module's clock or vice versa, change the clock source of all
ports firstly to the line setting, and then to the new internal clock setting.
Example
host1(config-controll)#clock source internal module
Use the no version to revert to the default, line.
See clock source.
Chapter 3: Configuring Unchannelized OCx/STMx Interfaces
Configuration Tasks
85
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