DEFINITY Enterprise Communications Server Release 7
Maintenance for R7r
555-230-126
Issue 4
June 1999
Maintenance Object Repair Procedures
9-1248PKT-INT (Packet Interface Circuit Pack)
9
refresh the standby’s memory. It takes several minutes after a Packet Interface
circuit pack on the standby SPE is reset before memory refresh of the standby
SPE is complete. During that time, demand tests of the standby Packet Interface
circuit will abort.
Service States
Packet Interface maintenance software maintains a state variable that keeps
track of the in-service/out-of-service state of each Packet Interface circuit pack.
In a system equipped with a single SPE, if maintenance software detects that a
Packet Interface circuit pack has a ‘‘fatal fault’’, it will automatically attempt to
reset that circuit pack as quickly as possible. An extensive set of diagnostic tests
are run when the circuit pack is reset.
If the circuit pack diagnostic tests do not pass in a system without duplicated
SPEs, the failing Packet Interface circuit pack is placed in an out-of-service state.
All links handled by that circuit pack will go out of service. This is a disruptive
action since established calls associated with telephones connected to
Expansion Port Networks are dropped as a result of the EPNs being taken out of
service.
If the system is equipped with duplicated SPEs and if the standby SPE has an
acceptable state-of-health, an SPE interchange will occur instead of a reset of
the Packet Interface circuit pack. This is less disruptive than a reset since stable
calls are not disconnected.
A Packet Interface circuit pack will also be put in the ‘‘out-of-service’’ state if the
circuit pack has reported a fatal fault at system initialization time or if the circuit
pack has been reset by background maintenance three times within the last 15
minutes, whether or not the Reset test passes. The state of a Packet Interface
circuit pack can be determined by using the
status packet-interface
command.
Duplication Impact
The Packet Interface circuit pack is a single point of failure in a system that is not
equipped with duplicated SPEs. If this is not acceptable, customers have the
option of upgrading to a configuration with a duplicated SPE processor complex
as part of the High Reliability or Critical Reliability Configuration. the previous
figure shows the configuration with duplicated processors. The following
concepts apply only when the processors are duplicated.
■ Configuration Mismatch
The number and position of Packet Interface circuit packs on the standby
SPE must match exactly the number and position of Packet Interface
circuit packs on the active SPE. If this is not the case, a MAJOR alarm is
raised against a missing Packet Interface circuit pack on the standby SPE
and a WARNING alarm is raised against extra Packet Interface circuit
packs on the standby SPE.
