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# Triggering ANCP OAM

The l2c oam command provides an access-line test and rudimentary fault isolation capability for the B-RAS. Issuing this command triggers the access node to perform a loopback test on the local-loop (between the access-node and the CPE). The B-RAS generates a GSMP port management message to the neighbor specifying the access line identifier on the access node and OAM test characteristics desired by the B-RAS (for example, the number of cells/message to generate and the timeout period). The access node responds with the result of the triggered loopback test by means of a GSMP port management message. For example, when using an ATM-based local-loop, the ANCP operation can trigger the access node to generate ATM (F4/F5) loopback cells on the local loop.

l2c oam

- Use to trigger the access node to run a local loopback test on the specified interface.
- Field descriptions
  - Request status—Status of the OAM request (succeeded or failure)
  - Response code—Code that returned with the OAM response
  - DEFAULT RESPONSE—Response string (if any) that was included in the OAM response
- Example 1
  `
  host1#l2c oam interface atm 4/1.103
  request succeeded
  0x503 : DSL line status showtime.
  DEFAULT RESPONSE
  `
- Example 2
  `
  host1#l2c oam neighbor accessnode_1002 end-user-id enduser_1002
  request succeeded
  0x503 : DSL line status showtime.
  DEFAULT RESPONSE
  `
- There is no no version.
- See l2c oam.

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