Cisco ASR 900 Series Configuration Guide

CHAPTER 8
Clock Recovery System for SAToP
The Clock Recovery System recovers the service clock using Adaptive Clock Recovery (ACR) and Differential
Clock Recovery (DCR).
•
Prerequisites for Clock Recovery, page 133
•
Restrictions for Clock Recovery, page 133
•
Finding Feature Information, page 134
•
Adaptive Clock Recovery (ACR), page 134
•
Configuring DCR for OCn, page 142
•
Example: Adaptive Clock Recovery (ACR) for SAToP, page 146
•
Example: Differential Clock Recovery (DCR) for SAToP, page 147
•
Additional References for Clock Recovery, page 147
Prerequisites for Clock Recovery
•
The clock of interface modules must be used as service clock.
•
CEM must be configured before configuring the global clock recovery.
•
RTP must be enabled for DCR in CEM, as the differential clock information is transferred in the RTP
header.
Restrictions for Clock Recovery
•
The reference clock source is used and locked to a single clock.
•
The clock ID should be unique for a particular interface module for ACR/DCR configuration.
•
When CEM group is configured, dynamic change in clock source is not allowed.
1-Port OC-192 or 8-Port Low Rate CEM Interface Module Configuration Guide, Cisco IOS XE Everest 16.7.x (Cisco
ASR 900 Series)
133

Cisco ASR 900 Series Specifications

General

Brand	Cisco
Model	ASR 900 Series
Category	Network Router
Language	English