Cisco IOS Voice Troubleshooting and Monitoring -- MGCP Call Admission Control
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MGCP VoIP call admission control (CAC) has several commands available to analyze call statistics and operation of applications on the gateway. They are classified into these groups for clarity.
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Troubleshooting MGCP
To provide information about the operation of the MGCP application, use the following commands in privileged EXEC mode:
| Command | Purpose |
|---|---|
|
Router# debug mgcp all |
Displays real-time information about MGCP errors, events, media, packets, parser, system resource check (SRC), and VoIP call admission control (CAC) |
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Router# debug mgcp errors {endpoint endpoint-name} |
Displays MGCP errors |
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Router# debug mgcp events {endpoint endpoint-name} |
Displays MGCP events |
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Router# debug mgcp media {endpoint endpoint-name} |
Displays MGCP tone and signal information |
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Router# debug mgcp packets {endpoint endpoint-name | input-hex} |
Displays MGCP packet information, with input packets optionally in hexadecimal format |
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Router# debug mgcp parser |
Displays MGCP parser and builder information |
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Router# debug mgcp src |
Displays MGCP SRC CAC information |
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Router# debug mgcp voipcac |
Turns on debugging messages for the VoIP CAC process at the MGCP application layer |
Troubleshooting MGCP SRC CAC
To help identify SRC CAC problems, use the following commands in privileged EXEC mode:
| Command | Purpose |
|---|---|
|
Router# show call threshold {status [unavailable] | stats} |
Displays status of configured triggers or statistics for application programming interface (API) calls that were made to global and interface resources |
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Router# show mgcp statistics |
Displays MGCP statistics, including those for MGCP SRC VoIP CAC |
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Router# clear call threshold stats |
Clears call threshold statistics |
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Router# clear mgcp src-stats |
Clears statistics gathered for MGCP SRC CAC |
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Router# debug call threshold |
Displays details of trigger actions |
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Router# debug mgcp src |
Provides debug information for MGCP SRC CAC calls |
Troubleshooting MGCP RSVP CAC
To identify and trace RSVP CAC problems, use the following commands in privileged EXEC mode:
| Command | Purpose |
|---|---|
|
Router# show call fallback cache |
Displays a network congestion level check result if one has been cached |
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Router# show call rsvp-sync stats |
Displays statistics for calls that attempted RSVP reservation |
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Router# show call rsvp-sync conf |
Displays the configuration settings for RSVP synchronization |
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Router# show ip rsvp reservation |
Displays the RSVP-related receiver information currently in the database |
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Router# debug call rsvp-sync func-trace |
Displays messages about software functions called by RSVP |
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Router# debug call rsvp-sync events |
Displays events that occur during RSVP setup |
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Router# debug ip rsvp detail |
Displays detailed information about RSVP-enabled and Subnetwork Bandwidth Manager (SBM) message processing |
Troubleshooting MGCP SA Agent CAC
To help identify Service Assurance (SA) Agent CAC problems, use the following commands in privileged EXEC mode:
| Command | Purpose |
|---|---|
|
Router# show call fallback cache |
Displays a network congestion level check result if one has been cached |
|
Router# debug call fallback probes |
Verifies that probes are being sent correctly |
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Router# debug call fallback detail |
Displays details of the VoIP call fallback |
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Router# show rtr application {tabular | full} |
Displays global information about the SA agent feature. There are a number of other options for the show rtr command; use CLI help to browse a list of choices |
|
Router# debug rtr error |
Enables logging of SA agent run-time errors |
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Router# debug rtr trace |
Traces the execution of an SA agent operation |
