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Cisco ASR 1000 Series Aggregation Services Routers SIP and SPA Software Configuration Guide
OL-14127-08
Chapter 13 Configuring the POS SPAs
Configuration Tasks
To modify the clock source, use the following command in interface configuration mode:
To return to the default clock source, use the no form of this command.
Verifying the Clock Source
To verify the clock source, use the show controllers pos privileged EXEC command and observe the
value shown in the “Clock source” field.
The following example shows that the clock source is internal for interface port 0 on the POS SPA
installed in subslot
0 of the SIP that is located in slot 2 of the Cisco ASR 1000 Series Routers:
Router# show controllers pos 2/0/0
POS2/0/0
SECTION
LOF = 0 LOS = 1 BIP(B1) = 7
LINE
AIS = 0 RDI = 1 FEBE = 20 BIP(B2) = 9
PATH
AIS = 0 RDI = 0 FEBE = 0 BIP(B3) = 5
PLM = 0 UNEQ = 0 TIM = 0 TIU = 0
LOP = 0 NEWPTR = 0 PSE = 0 NSE = 0
Active Defects: None
Active Alarms: None
Alarm reporting enabled for: SF SLOS SLOF B1-TCA LAIS LRDI B2-TCA PAIS PLOP PRDI PUNEQ
B3-TCA RDOOL
APS
COAPS = 2 PSBF = 0
State: PSBF_state = False
Rx(K1/K2): 00/00 Tx(K1/K2): 00/00
Rx Synchronization Status S1 = 00
S1S0 = 02, C2 = CF
CLOCK RECOVERY
RDOOL = 0
State: RDOOL_state = False
PATH TRACE BUFFER: STABLE
Remote hostname : RouterTester. Port 102/1
Remote interface:
Remote IP addr :
Remote Rx(K1/K2): / Tx(K1/K2): /
BER thresholds: SF = 10e-5 SD = 10e-6
TCA thresholds: B1 = 10e-6 B2 = 10e-6 B3 = 10e-6
Clock source: internal
Command Purpose
Router(config-if)# clock source {line | internal} Specifies the clock source for the POS link, where:
• line—The link uses the recovered clock from
the line. This is the default.
• internal—The link uses the internal clock
source.
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