Cisco ASR 903 Manual page 133

Clocking
Here is the diagram for SYNC-E configuration. R1 router has its BITS port connected to external clock source and
then uses SYNC-E to distribute it to other routers.
OL-30526-01
Figure 28. Input Source Options
Clock Source
ASR903-R1
Loopback10: 10.10.1.1
Gi0/1/0
Gi0/1/0
Gi0/1/4
ASR903-R2
Loopback10: 10.10.2.2
Figure 29. SYNC-E
Gi0/1/1
Gi0/1/2
Cisco ASR 903 Router Design and Deployment Guide▄
ASR903-R3
Loopback10: 10.10.3.3
Gi0/1/0
Gi0/1/1
Gi0/1/1
Gi0/1/0
ASR903-R4
Loopback10: 10.10.4.4
Sync-E Configuration ▀
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