Avaya S8700 Maintenance Manual page 968

Maintenance-Object Repair Procedures
PNC State-of-Health Indexes
The Inter-PN Index form the state-of-health vector is used to track and compare
the states of health of both PNCs. The fields making up the indexes are 2-digit
numbers separated by periods (.), with each field representing a different class of
faults. The fault class fields are arranged in order of decreasing importance from
left to right. In other words, each field in the index supersedes the following fields
in determining which PNC is healthiest. A fault class drives an interchange only
when all of the higher priority fault classes are equal. A zero entry indicates no
faults present for that class. Increasing numbers indicate increasingly higher
numbers of faults present in that class.
The Inter-PN Index contains four fields (XX.XX.XX.XX). The Inter-PN Index
reports faults in connectivity between EPNs.
The meaning of each fault class field is given in
A zero entry indicates that there are no faults reported.
Higher numbers indicate increasing number of faults.
All zeros indicate a perfect state of health.
Unless the PNCs are locked, the active PNC's state of health should
always be equal to or better than the standby's. Otherwise, the system
performs a spontaneous interchange.
After a PNC-related alarm is cleared, the system performs a partial refresh of the
standby PNC. The corresponding fault class field is not updated to reflect the
improved state of health until the refresh is done. The state-of-health indexes do
not agree with the current alarm status during this period.
Table 8-101. PNC State-of-Health Fault Classes
Fault Class
FC_EAL
FC_PACL
FC_BFD
FC_HW
8-246 Issue 1 May 2002
Priority Description
1 Number of PNs with EALs down
2 Number of PNs with LINL, RINL, or EI-SNI
neighbor link faults
3 Number of PNs with BFDL (Bearer Fault
Detection Link) faults
4 Number of PNs affected by hardware faults
in a link having an EI as an endpoint.
(Endpoints can be determined with list atm
pnc.)
Table 8-101.
MOs
EXP-PN
EXP-PN
SYS-LINK
ATM-EI
555-233-143