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OAM Cells

The E-series router performs a similar operation for Operation, Administration, and Maintenance (OAM) cells, except that they do not need reassembly.

The router passes the following OAM cells transparently:

F5 alarm indication signal (AIS) segment and end-to-end
F5 remote defect indication (RDI) segment and end-to-end
F5 loopback segment and end-to-end
Resource management
F5 continuity check segment and end-to-end

In addition, F4 OAM cell forwarding is supported.

JUNOSe software does not allow for setting a segment endpoint on an ATM cross-connect interface. Segment OAM cells are forwarded to the egress interface in the same manner as end-to-end cells.

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