FibroLAN Falcon Gen-3 M-Class, Руководство пользователя

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Falcon M-Class | User Guide
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4.22.2.1 Maintenance Domain
A maintenance domain is a management space for the purpose of managing and administering a
network. A domain is owned and operated by a single entity and defined by the set of devices and
ports internal to it and at its boundary. The following drawing illustrates a typical maintenance
domains topology.
Figure 4-171: Service OAM Maintenance Domains
A unique maintenance level in the range of 0 to 7 is assigned to each domain by a network
administrator. Levels and domain names are useful for defining the hierarchical relationship that
exists among domains. The hierarchical relationship of these domains parallels the structure of the
customer, service provider, and operator. The larger the domain the higher the level value!
For example: Typically, customers are allocated with the largest domains while operators have the
smallest domains with the service provider domains between them in size. The customer domain
may have a maintenance level of 7 and the operator domain may have a maintenance level of 0. All
levels of the hierarchy must operate together.
Domains should not intersect because intersecting would mean management by more than one
entity, which is not allowed. Domains may nest or touch but when two domains nest, the outer
domain must have a higher maintenance level than the domain nested within it.
Nesting maintenance domains is useful in the business model where a service provider contracts
with one or more operators to provide Ethernet service to a customer. Each operator would have
its own maintenance domain and the service provider would define its domain
— a superset of the
operator domains. Furthermore, the customer has its own end-to-end domain which is in turn a
superset of the service provider domain. Maintenance levels of various nesting domains should be