Service Group Profile Based Configuration
The DOCSIS Interface and Fiber Node Configuration guide describes the interface and fiber node configurations that are required to operationalize the Cisco cBR router. The steps described to accomplish the tasks involved in such configuration are complex.
To simplify and speed up the process of configuring the physical and logical interfaces required to deploy the Cisco cBR router quickly, a service group (SG) profile based approach is adopted. This document describes the simplified SG profile approach.
This approach provides the following advantages:
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Improves and simplifies the deployment of Cisco cBR router.
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Improves and simplifies the configuration of Cisco cBR Router by eliminating duplicate configurations.
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Improves and simplifies troubleshooting of Cisco cBR router.
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Supports faster Converged Cable Access Platform (CCAP) provisioning by using common and quick replication across nodes and regions.
To configure the interfaces and quickly operationalize the Cisco cBR router, a set of common profiles are created and are created and configured into global service group profiles. These global service group profiles may be applied to fiber node interfaces along with a mapping of the service group interfaces to the physical interfaces.
Common profiles are profiles which contain configurations for common service group (SG) interfaces like MAC domain, wideband-cable, and primary downstream
The common profiles and the global SG profiles may be independent of the topology of the network in which they are applied. The SG interface to physical interface mapping defines the behavior of the profiles in the topology that the SG profiles have been applied to.
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A common profile cannot be deleted if it is associated with the fiber nodes. It can be modified by entering the profile configuration mode using the cable profile command.
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A service-group profile cannot be deleted or modified if it is associated with the fiber nodes.
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To associate a new global SG profile to a fiber node, dissociate the currently associated global SG profile from the fiber node.
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To configure for a unique topology, use the full configuration approach provided in DOCSIS Interface and Fiber Node Configuration guide.
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When the secondary line card is in active mode, the following limitations apply:
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A MAC domain, Wideband-Cable interface, downstream channel, and SG profile cannot be modified when they are associated with the fiber nodes.
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SG profile cannot be dissociated from the fiber nodes.
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A MAC domain, Wideband-Cable interface, downstream channel, and SG profile can be created but cannot be associated to the fiber node.
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To enable the SG operation simplification feature, auto-reset feature must be enabled using the cable wideband auto-reset command.
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Do not support downgrade cBR-8 image from 16.7.x to previous image if the configuration includes mac domain split configuration.
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Define and configure the Common profiles: The SG interface profiles or the common profiles contain configuration parameters common to a group of similar interfaces. For example, a profile may contain specific configuration parameters shared by multiple Wideband-Cable interfaces, associated across multiple line cards. A common profile is configured at the global or chassis level. All interfaces associated with a profile will inherit the configuration in the profile. Any common profile may be associated with any global SG profile. Use the cable profile profile-type profile-name command to define the following common profiles: -
MAC Domain (MD) profile
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Primary Downstream channel (DS) profile
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Wideband-cable Interface (WB) profile
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Global Service Group (SG) profile
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Complete the following configurations to the fiber node interface using the cable fiber-node command: -
Define the downstream and upstream ports. Map the appropriate interface-cable using the downstream interface-cable command. Map the appropriate upstream-cable interface using the upstream upstream-cable command.
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Use the downstream sg-channel command to map the logical downstream SG channels to the physical RF channels and the upstream sg-channel command to map the logical upstream SG channels to the physical upstream channels.
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Use the service-group profile to associate the global service group profile to the fiber node.
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See the use case scenarios for configurations and examples.
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