PKT-INT (Packet Interface)
Issue 1 May 2002
8-939555-233-142
Private Loop-around Tests (#885)
This test requests the Packet Interface circuit to execute its two private
loop-around tests: Level-2 Loop Around, and Broadcast Path Loop Around.
These tests verify the health of the circuit pack’s packet-bus interface, as well as
the translation RAM, inward and outward bound data paths, parity indications and
CRC calculations.
■ Level-2 (LAP-D) Link Loop Around
LAP-D is a link level protocol that is used for all system links. This test
verifies the health of the processing of these links.
■ Broadcast Link Loop Around
Each ISDN-BRI port has two associated broadcast signaling links, one for
call control and one for maintenance and management. Since these links
have separate routing circuitry from the Level-2 Loop Around, this test
forces a CRC error to verify the CRC hardware associated with the
broadcast data path.
These tests are also run as part of the reset tests. If the Level-2 Loop-Around test
fails as background tests, a “fatal error” message is sent to the Packet Interface
circuit’s maintenance software, and the Packet Interface circuit is put in the
out-of-service state. Therefore, repair procedures associated with Abort
Code 1137 (out of service) would normally follow failures of the level-2 test.
2 FAIL The Flash memory checksum test failed. The circuit pack may still be
operational, but will fail if a reset is executed.
1. Retry the command.
2. If the same error code occurs:
a. If the Packet Interface circuit is on the standby IPSI, replace that circuit
pack.
b. If the Packet Interface circuit is on the active IPSI, enter set
ipserver-interface to perform a planned IPSI interchange.
c.
3 FAIL The Boot PROM memory Checksum test and the FLash memory checksum
test have both failed. Follow the steps listed for FAIL Error Codes 1 and 2.
PASS The circuit pack’s firmware is in a proper state. If problems are still reported on
the circuit pack, check for errors on the Private Loop-around test (#885) and
Maintenance Loop-Around test (#886).
Table 8-394. Test #884 Memory Checksum Test — Continued
Error
Code
Test
Result Description / Recommendation
Continued on next page
To Next Page
Loading...
