Maintenance-Object Repair Procedures
555-233-143
8-1258 Issue 1 May 2002
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.
Table 8-510. Test #885 Private Loop-Around Tests
Error
Code
Test
Result Description / Recommendation
1006,
1137
ABORT Packet Interface circuit is out of service, so normal maintenance tests do not
run on that circuit.
1. Enter reset packet-interface Uc to reset the Packet Interface circuit.
For further action, see the procedures in Table 8-509 on page 8-1256 for
the Packet Interface Reset test (#889).
1334 ABORT The Packet Interface circuit’s command queue is full. This should be a
temporary condition caused by a high rate of commands being sent to a Packet
Interface circuit. Continued operation with a full command queue will cause a
system WARM restart that may escalate to more severe restart levels.
1. Retry the command at 10-second intervals up to 5 times.
1335 ABORT Internal IPSI error. The Packet Interface circuit is on the standby IPSI, so this
test is not allowed to execute.
1. To run this test on the standby Packet Interface, enter set
ipserver-interface Uc to activate it.
Continued on next page
To Next Page
Loading...
