Table: 802.1ag and Y.1731 OAM Functionality Overview lists the 802.1ag and Y.1731 OAM functions supported on the 7705 SAR. For each function and test, the table identifies the PDU that carries the test data, the test’s target entity, and the standards that the 7705 SAR supports for the test.
For example, the 7705 SAR can run an Ethernet Continuity Check using an ETH-CC test according to the dot1ag and the Y.1731 standards. For either standard, the test data is carried in a Continuity Check Message (CCM) and the test target is a MEP.
The Fault Management (FM) capabilities of ITU-T Y.1731 extend the functionality of dot1ag (ETH-CFM) with additional FM functions as well as performance monitoring (PM) capabilities. The generation of AIS and RDI messages are defined under the FM section of the Y.1731 specification, whereas Ethernet layer, delay, jitter, loss, and throughput tests are part of Y.1731 PM capabilities.
Table: Supported OAM Tests per MEP Type lists the MEPs that support each test.
Test |
OAM function |
PDU |
Target |
Standard |
|---|---|---|---|---|
ETH-LB |
Loopback |
LBM, LBR |
MEP |
dot1ag, Y.1731 |
ETH-LT |
Linktrace |
LTM, LTR |
MEP |
dot1ag, Y.1731 |
ETH-CC |
Continuity Check |
CCM |
MEP |
dot1ag, Y.1731 |
ETH-RDI |
Remote Defect Indication |
CCM |
MEP |
dot1ag, Y.1731 |
ETH-AIS |
Alarm Indication Signal |
AIS |
MEP |
Y.1731 |
ETH-LM |
Frame Loss Measurement (dual-ended) |
CCM |
MEP |
Y.1731 |
ETH-LM |
Frame Loss Measurement (single-ended) |
LMM, LMR |
MEP |
Y.1731 |
ETH-DM |
Frame Delay Measurement (two-way) |
DMM, DMR |
MEP |
Y.1731 |
ETH-DM |
Frame Delay Measurement (one-way) |
1DM |
MEP |
Y.1731 |
ETH-DV |
Frame Delay Variation (one-way) |
DMM, DMR |
MEP |
Y.1731 |
ETH-Test |
Test Error Measurements |
TST |
MEP |
Y.1731 |
ETH-SL |
Synthetic Loss Measurement |
SLM |
MEP |
dot1ag, Y.1731 |
OAM Test |
Epipe SAP Up/Down MEP |
Epipe Spoke SDP Up/Down MEP |
VPLS SAP Up/Down MEP |
VPLS Spoke/Mesh SDP Up/Down MEP |
Ethernet Network Interface Down MEP (Facility) |
|---|---|---|---|---|---|
Loopback |
✓ |
✓ |
✓ |
✓ |
✓ |
Linktrace |
✓ |
✓ |
✓ |
✓ |
✓ |
Throughput Measurement |
✓ |
✓ |
✓ |
✓ |
✓ |
Continuity Check |
✓ |
✓ |
✓ |
✓ |
✓ |
Remote Defect Indication |
✓ |
✓ |
✓ |
✓ |
✓ |
Alarm Indication Signal |
✓ |
✓ |
|||
Test Error Measurements |
✓ |
✓ |
✓ |
||
Frame Delay Measurement (two-way) |
✓ |
✓ |
✓ |
✓ |
✓ |
Frame Delay Measurement (one-way) |
✓ |
✓ |
✓ |
✓ |
✓ |
Frame Delay Variation (one-way) |
✓ |
✓ |
✓ |
||
Frame Loss Measurement (dual-ended) |
✓ |
✓ |
|||
Frame Loss Measurement (single-ended) |
✓ |
✓ |
✓ |
||
Synthetic Loss Measurement |
✓ |
✓ |
✓ |
✓ |
✓ |