Example of a Router Receiving Only an RDI-P Alarm

Problem

Figure 17 shows a router receiving only an RDI-P Alarm. The X indicates that the LOS or LOF occurs in the section between ADM 1 and ADM 2.

Solution

All diagnostics are from the perspective of Router 2 (the Juniper Networks router).

Figure 17: Example of a Router Receiving Only an RDI-P Alarm

1. ADM 1 detects an LOS or LOF on an incoming SONET section.
2. ADM 1 sends an RDI-L to ADM 2.
3. ADM 1 sends an AIS-P downstream to Router 1.
4. Router 1 sends an RDI-P upstream to Router 2.
5. Router 2 only receives an RDI-P alarm.