System information

Configuring Packet Over SONET
14-9
where:
1 is the priority assigned to the primary network clock.
2 is the priority assigned to the secondary network clock.
slot is the POS slot on the BSR.
interface is the POS interface from which the clocking is recovered.
2. To verify the network clock source information that you have configured, use the
show network-clocks command in Global Configuration mode, as shown in the
following example:
BSR(config)#show network-clocks
Setting Clock Recovery from the Received SONET Signal
Follow these steps to set clock recovery from the received SONET signal:
1. Enter the POS interface from which the clock is to be recovered, using the
interface pos command in Global Configuration mode, as shown in the following
example:
BSR(config)#interface pos <slot>/<interface>
where:
slot is the POS module slot on the BSR 64000 chassis.
interface is the line POS interface on the POS module.
2. To use the recovered clock from the received SONET signal, use the no pos
internal-clock command in Interface Configuration mode, as shown below:
BSR(config-if)#no pos internal-clock
To return to the default, use the pos internal-clock command in Interface
Configuration mode, as shown below:
Note: Internal clock mode is enabled by default for the POS module to gather
its timing from the network clocks that are configured on the SRM. If the
internal clocking function is disabled, clock recovery is taken from the
received SONET signal.