Maintenance Object Repair Procedures
555-233-123
10-1516 Issue 4 May 2002
SRP-EPN
The Survivable Remote Expansion Port Network (SREPN) provides EPN service
to the customer when the link to the main processor fails or is broken, or when the
processor or center stage fails. SREPN is a disaster recovery operation rather
than an additional reliability option.
Due to the hardware solution for Survivable Remote Processor (SRP),
maintenance tests to make sure the SRP can go into “survive” mode are not
possible.
When the Survivable Remote Processor field on the system-parameters
customer-options form is set to y, then the following alarming strategy is used:
1. When the SRP is not in control of the SREPN (which is the normal state),
then all alarms associated with the SREPN are downgraded to WARNING
alarms. These include the EXP-INTF in the SRP, the EXP-LINK between
the SRP and the SREPN, and all maintenance components in the SREPN.
2. When the SRP is in control of the the SREPN (the EXP-LINK is up between
the SRP and SREPN), the disaster recovery state is in effect. A MAJOR
alarm is raised against the SRP-EPN maintenance object. All other
maintenance objects use their normal alarm strategies.
If the G3r PPN loses control (connectivity) to a SREPN, and the SRP associated
with the SREPN does not raise a MAJOR alarm against the SRP-EPN
maintenance object, then the disaster recovery mechanism is NOT working.
There are no tests associated with the SRP-EPN maintenance object. The only
way to resolve the SRP-EPN alarm is to fix the connectivity problem(s) between
the G3r PPN and the SREPN.
MO Name in Alarm Log Alarm Level Full Name of MO
SRP-EPN MAJOR SRP-EPN
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