How to Troubleshoot an MGCP Gateway
A Cisco router enabled with the Media Gateway Control Protocol is a powerful device that can be used to route information in your network. It can also be configured to route voice over Internet protocol phone calls for a large number of phones. If the ports on your router stop functioning properly, you can follow these troubleshooting steps to find the root of the problem and quickly solve it.
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Instructions
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Remove the router from your network and replace it with a working backup before attempting any troubleshooting.
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Connect a terminal to the console port of the router. Change the stop bits and baud-rate settings to their normal standards for the model of router you are using.
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Type the "Show MGCP" command into the command prompt to check which Media Gateway Control Protocol parameters are currently in effect on the router. Verify that none of the parameters is disabled and which need to be set to "enabled" for your router to function properly.
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Enter the "Show Voice Port_Number" command to view a listing of all of the settings on each of the connected voice ports.
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Input the "Show MGCP Statistics" command to see if any of the MGCP parameters are failing or if the IP address is showing up incorrectly.
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Finish your troubleshooting by typing the "Show CCM Manager" command to make sure the router is registering properly.
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Tips & Warnings
If any of the settings are incorrect, or if you can't find an incorrect setting but are still having problems with the router, you can go through each port individually and use the "Shutdown/no shutdown" command to reset them.
Never attempt these troubleshooting techniques on a router that is currently filtering information requests on a live network, as it can have unintentional consequences for both the users on the network and your network configuration.
Resources
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