Cisco Cisco IOS Software Release 12.4(4)T
1246
Caveats for Cisco IOS Release 12.4T
OL-8003-09 Rev. Z0
Resolved Caveats—Cisco IOS Release 12.4(6)T3
When the symptom occurs with FXS or analog E&M modules, enter the terminal monitor
command followed by the test voice port port- number codec-debug 10 1 command for one of the
affected ports. The output typically should be a single octet value for each register. See the example
output (4) below.
command followed by the test voice port port- number codec-debug 10 1 command for one of the
affected ports. The output typically should be a single octet value for each register. See the example
output (4) below.
Workaround: There is no workaround to prevent the symptom from occurring. When the symptom
has occurred, you must reload the gateway to restore proper operation.
has occurred, you must reload the gateway to restore proper operation.
Further Problem Description: The changes in CSCse15025 includes changes in CSCsc11833 and
CScsd90851. These changes have been shown to help mitigate this problem in the majority of cases.
CScsd90851. These changes have been shown to help mitigate this problem in the majority of cases.
There is a further detection and reset mechanism in CSCse15025 that will recover the DSP which is
in this state. This mechanism will trigger immediately if the impacted voice port is an analog FXO
port. For other voice ports, a delay in the detection will be present and it is possible to see the
symptom of this problem before the recovery code triggers.
in this state. This mechanism will trigger immediately if the impacted voice port is an analog FXO
port. For other voice ports, a delay in the detection will be present and it is possible to see the
symptom of this problem before the recovery code triggers.
Note that the reset mechanism will cause any active calls utilizing the DSP in question to be
dropped.
dropped.
It is recommended if running with modules which can be impacted by this issue to upgrade to a
release of software which contains the changes in CSCse15025. If the DSP is reset and the below
output is seen, contact the TAC for further assistance. Note that this output is sent at debug level and
it is recommended to enable either syslog or logging buffered on the gateway.
release of software which contains the changes in CSCse15025. If the DSP is reset and the below
output is seen, contact the TAC for further assistance. Note that this output is sent at debug level and
it is recommended to enable either syslog or logging buffered on the gateway.
Logging buffered on the gateway is enabled through the global command logging buffered 50000
debug as an example to set the logging buffered to use 50K bytes of processor memory for logging.
The output of the log can be seen with the exec command show log.
debug as an example to set the logging buffered to use 50K bytes of processor memory for logging.
The output of the log can be seen with the exec command show log.
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Example output when detection and recovery code on gateway triggers:
*May 31 14:30:43.343: TDM pointers: 0100 0100 0115 0115. Deltas: 0001 0000.
*May 31 14:30:43.347: Received alarm indication from dsp(0/1)
0030 0000 0080 0000 0013 4100 2E2E 2F2E 2E2F 6D6F 6475 6C65 732F 7363 6865
6475 6C65 2F64 6562 7567 2E63 2833 3634 2900
*May 31 14:30:43.347: ../../modules/schedule/debug.c(364)
*May 31 14:30:43.347: %LINK-3-UPDOWN: Interface Foreign Exchange Office 0/0/0,
changed state to Administrative Shutdown
*May 31 14:30:43.647: %LINK-3-UPDOWN: Interface Foreign Exchange Office 0/0/1,
changed state to Administrative Shutdown
*May 31 14:30:43.947: %LINK-3-UPDOWN: Interface Foreign Exchange Office 0/0/2,
changed state to Administrative Shutdown
*May 31 14:30:44.247: %LINK-3-UPDOWN: Interface Foreign Exchange Office 0/0/3,
changed state to Administrative Shutdown
*May 31 14:30:48.147: Crash dump CLI may not be configured, not able to get
crash info, slot 0, dsp 1
*May 31 14:30:48.147: DSPDUMP - Recover slot 0 dsp 1
*May 31 14:30:48.147: DSPDUMP - ka sent 0, ka_cnt 51193, skip_ka 103079
*May 31 14:30:50.579: %DSPRM-5-UPDOWN: DSP 1 in slot 0, changed state to up