Demand test descriptions and error codes - Avaya Support

S8700 series
PKT-INT (Packet Interface)
If the circuit pack’s diagnostic tests do not pass in a standard- or duplex-reliability system
(unduplicated IPSIs), the failing Packet Interface is placed in an out-of-service state. Every link
handled by that IPSI goes down, and may be re-established using other Packet Interface
resources. Calls associated with these links may drop.
If the standby IPSI (in a high- or critical-reliability system with duplicated IPSIs) has an
acceptable state of health, maintenance software interchanges the IPSIs, instead of resetting
the active IPSI’s Packet Interface module. This is less disruptive than a reset.
An IPSI’s Packet Interface module goes out-of-service if the IPSI has been reset by background
maintenance 3 times in the last 15 minutes, whether or not reset succeeded. Various errors will
lead to a Packet Interface reset. See the Error log entries and recommended actions section.
An extensive set of diagnostic tests is run when the circuit pack is reset.
S8700 series
Duplication Impact
The Packet Interface module is a single point of failure in a standard- or duplex-reliability
system, with unduplicated IPSIs. If not acceptable, an S8700 customer can upgrade to a high-
or critical-reliability system with duplicated IPSIs. Figure 55: Distributed PKT-INTs shows an
S8700 Fiber-PNC configuration with duplicated IPSIs. The following concepts apply to
duplicated IPSIs:
● Packet bus connection
In a high- or critical-reliability system (duplicated IPSIs), the standby IPSI’s Packet
Interface module cannot access the packet bus to write data, except during a planned IPSI
interchange or when the Active-Standby Peer Link Test (#888) is run. The Packet Interface
Maintenance Looparound Test (#886), which requires access to the packet bus, is not run
on the standby IPSI’s Packet Interface module.
● IPSI interchange
Severe Packet Interface module faults that cause system and application links to go down
are detected within 1 second. A fatal fault error message is generated, and the Packet
Interface maintenance software attempts to run the Packet Interface Reset test. In a high-
or critical-reliability system, this results in a requested IPSI interchange, instead of a
Packet Interface reset, since stable calls are preserved across the interchange.
Issue 5 May 2009 735