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.
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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Traces the execution of an SA agent operation
Traces the execution of an SA agent operation
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[[Category:IOS Voice Troubleshooting]]
 

Latest revision as of 17:18, 16 October 2012

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.

Guide Contents
Troubleshooting Cisco IOS Voice Overview
Debug Command Output on Cisco IOS Voice Gateways
Filtering Troubleshooting Output
Cisco VoIP Internal Error Codes
Troubleshooting Cisco IOS Voice Telephony
Troubleshooting Cisco IOS Voice Protocols
Troubleshooting Cisco IOS Telephony Applications
Monitoring the Cisco IOS Voice Network
Cause Codes and Debug Values


Contents

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)

Router# debug mgcp errors {endpoint endpoint-name}

Displays MGCP errors

Router# debug mgcp events {endpoint endpoint-name}

Displays MGCP events

Router# debug mgcp media {endpoint endpoint-name}

Displays MGCP tone and signal information

Router# debug mgcp packets {endpoint endpoint-name | input-hex}

Displays MGCP packet information, with input packets optionally in hexadecimal format

Router# debug mgcp parser

Displays MGCP parser and builder information

Router# debug mgcp src

Displays MGCP SRC CAC information

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

Router# show mgcp statistics

Displays MGCP statistics, including those for MGCP SRC VoIP CAC

Router# clear call threshold stats

Clears call threshold statistics

Router# clear mgcp src-stats

Clears statistics gathered for MGCP SRC CAC

Router# debug call threshold

Displays details of trigger actions

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

Router# show call rsvp-sync stats

Displays statistics for calls that attempted RSVP reservation

Router# show call rsvp-sync conf

Displays the configuration settings for RSVP synchronization

Router# show ip rsvp reservation

Displays the RSVP-related receiver information currently in the database

Router# debug call rsvp-sync func-trace

Displays messages about software functions called by RSVP

Router# debug call rsvp-sync events

Displays events that occur during RSVP setup

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

Router# debug call fallback detail

Displays details of the VoIP call fallback

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

Router# debug rtr trace

Traces the execution of an SA agent operation

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