EXFO FTB/IQS-88000 Series Power Blazer for FTB-2/2Pro/500/IQS-600 - Manual (Page 309)

Test Results
Power Blazer 297
Alarms/Errors

Unexp MEP (Unexpected MEP)
RX: A CCM frame was received from the peer MEP with same MEG/MD
Level, correct MEG ID/MAID, and correct source MAC Address
(corresponds to the peer MEP) but with unexpected MEP ID. The alarm
is cleared when no CCM frames with same MEG/MD Level, correct
MEG ID/MAID, correct source MAC Address (corresponds to the peer
MEP) but with an unexpected MEP ID are received within an interval
equal to 3.5 times the configured CCM transmission period.

Unexp Period (Unexpected Period)
RX: A CCM frame is received from the peer MEP with same MEG/MD
Level, correct MEG ID/MAID, and correct MEP ID but with a period field
value different than the one configured. The alarm is cleared when no
CCM frames with same MEG/MD Level, correct MEG ID/MAID, and
correct MEP ID but with incorrect period field value are received within
an interval equal to 3.5 times the configured CCM transmission period.

RDI (Remote Defect Indication)
RX: The RDI flag bit of a valid CCM frames is set to 1. A valid CCM frame
has its source MAC address matching the Peer MEP MAC address, the
destination MAC address matching either the unit port Unicast MAC
address or a Multicast class 1 address
1
, and VLANs matching the unit
port VLANs.
TX: The RDI flag bit of transmitted CCM frames is set to 1.
1. Refer to Unicast/Multicast Addresses for Ethernet OAM on page 623 for more information.