However, when
voice and video are transported on Ethernet networks it becomes a required characteristic
of Carrier Ethernet.
Management Ethernet has historically used Simple Network Management Protocol
(SNMP) Management Information Bases (MIB) to communicate Ethernet network fault
information. This protocol however, is insufficient for the detailed link-by-link and endto-
end fault detection and management required on large nationwide networks that
may involve multiple service providers. The definition of new protocols and specifications
to provide this type of visibility is important for Carrier Ethernet support.
Scalability Historically, carriers had to offer bandwidth in very coarse increments.
TDM jumps from 1.5 Mbps to 45 Mbps. This discontinuity in bandwidth introduced
inefficiency into the WAN data network that Carrier Ethernet is designed to overcome.
In addition, scalability implies a need to span large geographies and support millions
of customers on the same network, all while potentially keeping each customer data
separate.
All five of these characteristics indicate areas where definitions, specifications, standards,
and new approaches are required to make Ethernet packets and Ethernet services
efficient and effective on large public networks.
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