Cisco ASR 900 Series - Flex LSP Overview; Signaling Methods and Object Association for Flex LSPs

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).
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Prerequisites for Clock Recovery, page 133
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Restrictions for Clock Recovery, page 133
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Finding Feature Information, page 134
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Adaptive Clock Recovery (ACR), page 134
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Configuring DCR for OCn, page 142
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Example: Adaptive Clock Recovery (ACR) for SAToP, page 146
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Example: Differential Clock Recovery (DCR) for SAToP, page 147
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Additional References for Clock Recovery, page 147
Prerequisites for Clock Recovery
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The clock of interface modules must be used as service clock.
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CEM must be configured before configuring the global clock recovery.
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RTP must be enabled for DCR in CEM, as the differential clock information is transferred in the RTP
header.
Restrictions for Clock Recovery
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The reference clock source is used and locked to a single clock.
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The clock ID should be unique for a particular interface module for ACR/DCR configuration.
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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)
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