CHAPTER 10
Configuring Data Communication Channel
The Data Communication Channel (DCC) feature uses the SONET or SDH Operation Administration and
Maintenance (OAM) channel to manage devices that support SONET or SDH interfaces. SONET or SDH
standards support extensive operations, administration, management, and provisioning (OAM&P) capabilities.
The following overhead bytes are specified in the standards as the OAM channels that carry management
information, alarms, and management commands:
•
D1 to D3 bytes of the Section overhead
•
D4 to D12 bytes of the Line overhead
These overhead bytes are referred to as the Data Communication Channel (DCC). The Line-level DCC is a
576 kbps OAM channel; the Section-level DCC is a 192 kbps OAM channel. DCC feature uses the data
communications channel to access network devices that are connected through SONET/SDH interfaces for
management access.
ITU-G.7712 has defined the following three DCC network domains:
•
OSI DCC network
•
IP DCC network
•
OSI+IP DCC network
Effective Cisco IOS XE Everest 16.6.1 release, only OSI DCC network and IP DCC network are supported,
which implies that same type of network resides on either side of the router.
Figure 11: Implementation of DCC
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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