The bottom line / long story short is: Ethernet has four principal open issues: 1) standards are not complete 2) there are multiple standards in different forums that are not consistent 3) per EVC performance counters for SLA verification 4) hardware based traceroute and migration of existing products to support this capability. Ethernet offers three principal advantages in comparison to SONET: 1) traceroute 2) better automation 3) enhanced security. The prognosis is - if and when the above issues are addressed, Ethernet has the potential to offer enhanced OAM capability in comparison to SONET. Table 1 summarizes the current status of Carrier Class Ethernet for the principal OAM flows and functions.
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