IEEE 802.1ag
This standard defines the mechanisms to detect and isolate faults on Ethernet networks. These faults can be simple connectivity faults or more complex faults due to misconfigurations (cross-connect & remote mep errors). The basic principal is that end nodes (MEPs) exchange regular messages called Continuity Check Messages (CCM). The message rate is configurable from 3.3ms up to 10 minutes for each service.
Mingoa's hardware detects faults using in service CCM messaging. These messages travel end
to end along each monitored service in parallel with data packets. Mingoa's hardware supports
monitoring hundreds of services at 3.3ms without compromising the data throughput.
This is accomplished by patented schemes to insert and extract CCM packets into/from the data stream.
Mingoa's hardware also supports all the standard TLV fields carried in CCM messages (Port Status,
Interface Status, Sender ID and Organisational Specific).
These allow change of status to be communicated to the other end.
Mingoa's patented MEP identification algorithm detects connectivity
errors, cross-connect errors and remote mep errors at line rate. Other MEP identification schemes
may not identify all these types of errors.