Table of Contents

Feature Overview

Benefits
Restrictions
Related Features and Technologies
Related Documents

Supported Platform
Supported Standards, MIBs, and RFCs
Configuration Tasks

Configuring MGCP
Verifying the MGCP Configuration

Monitoring and Maintaining the MGCP Configuration
Configuration Examples
Command Reference
clear mgcp statistics
ds0-group
mgcp
mgcp block-newcalls
mgcp call-agent
mgcp codec
mgcp default-package
mgcp ip-tos
mgcp max-waiting-delay
mgcp package-capability
mgcp playout
mgcp quality-threshold
mgcp request retries
mgcp request timeout
mgcp restart-delay
mgcp vad
show mgcp
Debug Commands
debug mgcp
Glossary

Media Gateway Control Protocol for the Cisco AS5300 Voice/Gateway

This feature module describes the implementation of Media Gateway Control Protocol (MGCP) for trunking gateways on the Cisco AS5300 and includes the following sections:

• Feature Overview

• Supported Platform

• Supported Standards, MIBs, and RFCs

• Configuration Tasks

• Configuration Examples

• Command Reference

• Glossary

Feature Overview

MGCP provides simple call control functionality in a Voice over IP (VoIP) environment where distributed call agent applications manage calls on trunking gateways.

Benefits

This feature offers the following benefits:

• Enables inter-exchange carriers (IXCs) that do not have time division multiplexing (TDM) equipment to provide both long distance services to corporate customers and provide connectivity to local exchange carriers (LECs) and other IXCs that use TDM equipment.

• Offers IXCs IP networks as an alternative to congested TDM networks.

• Provides standard MGCP implementing. MGCP will support SNMP through the XGCP-MIB, which provides network management for external media gateway control protocols.

• Supports TDM hairpinning, which allows trunking gateways to route a call back to the Public Switched Telephone Network (PSTN) or private PBX if the IP network is too busy to handle the call. Hairpinning also can be used to connect the PSTN to the network access server (NAS).

Restrictions

MGCP supports PBXs using common channel signaling (CCS) but not channel associated signaling (CAS).

Related Features and Technologies

Voice over IP

Related Documents

• Cisco IOS Multiservice Applications Command Reference for release 12.1

http://www.cisco.com/univercd/cc/td/doc/product/software/ios121/121cgcr/multi_r/index.htm

• Cisco IOS Multiservice Applications Configuration Guide for release 12.1

http://www.cisco.com/univercd/cc/td/doc/product/software/ios121/121cgcr/multi_c/index.htm

Supported Platform

Cisco Access Server 5300

Supported Standards, MIBs, and RFCs

Standards

This implementation of MGCP is based on the IETF MGCP draft version 0.1 dated November 9th, 1998.

MIBs

XGCP-MIB

For descriptions of supported MIBs and how to use MIBs, see the Cisco MIB web site on CCO at http://www.cisco.com/public/sw-center/netmgmt/cmtk/mibs.shtml.

RFCs

No new or modified RFCs are supported by this feature.

Configuration Tasks

See the following sections for configuring MGCP. Each task in the list indicates if the task is optional or required:

• Configuring MGCP (Required)

• Verifying the MGCP Configuration (Optional)

Configuring MGCP

To configure MGCP, follow these commands, beginning in global configuration mode:

	Command	Purpose
Step 1	router# config t	Enter global configuration mode.
Step2	router(config)# mgcp	Start the MGCP daemon.
Step3	router(config)# mgcp request timeout timeout	Specify how long the gateway should wait for a response to a request.
Step4	router(config)# mgcp request retries count	Specify the number of times to retry sending the mgcp command.
Step5	router(config)# mgcp call-agent {ipaddr | hostname} [port]	Configure the call agent's address.
Step6	router(config)# mgcp max-waiting-delay value	Configure the maximum waiting delay to be used in an RSIP message as restart instructions for the call agent.
Step7	router(config)# mgcp restart-delay value	Configure the restart delay value to be used in an RSIP message as graceful tear down instructions for the gateway connection.
Step8	router(config)# mgcp vad	Configure voice activity detection.
Step9	router(config)# mgcp package-capability {as-package | dtmf-package | gm-package | rtp-package | trunk-package}	Specify an MGCP package capability.
Step10	router(config)# mgcp default-package {as-package | dtmf-package | gm-package | rtp-package | trunk-package}	Configure the default package capability type.
Step11	router(config)# mgcp quality-threshold {hwm-jitter-buffer value | hwm-latency value | hwm-packet-loss value | lwm-jitter-buffer value | lwm-latency value | lwm-packet-loss value}	Configure the jitter buffer size, packet-loss threshold, and latency threshold.
Step12	router(config)# mgcp playout {adaptive init-value min-value max-value} | {fixed init-value}	Tune the jitter buffer packet size used for MGCP connections.
Step13	router(config)# mgcp codec type [packetization-period value]	Configure the default codec type.
Step14	router(config)# mgcp ip-tos {high-reliability | high-throughput | low-cost | low-delay | precedence value}	Enable the IP Type of Service for MGCP connections.
Step15	router(config)# controller t1 slot#	Use the controller configuration mode for the T1 controller in the specified slot.
Step16	router(config-controller)# framing type	Configure the framing type.
Step17	router(config-controller)# clock source type	Configure the clock source.
Step18	router(config-controller)# linecode type	Configure the line coding.
Step19	router(config-controller)# ds0-group n timeslots range type signaling-type service mgcp	Configure the DS0s to support MGCP.

Verifying the MGCP Configuration

To verify your MGCP configuration and obtain MGCP statistics, use the following commands:

Command	Purpose
Router# show mgcp [all | errors | events | packets | parser]	Displays all active MGCP connections on the router.
Router# debug mgcp [connection | endpoint | statistics]	Turns on debugging for the gateway.

Monitoring and Maintaining the MGCP Configuration

Use these commands at any time to monitor the MGCP configuration:

Command	Purpose
Router# show mgcp [all | errors | events | packets | parser]	Displays all active MGCP connections on the router.
Router# clear mgcp statistics	Resets the MGCP statistical counters.

Configuration Examples

version 12.0
no service pad
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
!
hostname mgcpgw-rsvp1

!
!
!
!
resource-pool disable

!
!
!
!
!

ip subnet-zero
ip host mickey 209.165.1.2
ip host dirt 209.165.200.254
ip domain-name mgcpgw.cisco.com
ip name-server 209.165.0.1
ip name-server 209.165.0.65
ip name-server 209.165.1.100

!
mgcp
mgcp request timeout 3000
mgcp request retries 5
mgcp call-agent 209.165.167.3 8550
mgcp max-waiting-delay 3
mgcp restart-delay 10
mgcp vad
mgcp package-capability gm-package
mgcp package-capability dtmf-package
mgcp package-capability trunk-package
mgcp package-capability as-package
mgcp default-package trunk-package
cns event-service server
mta receive maximum-recipients 0
!
!
controller T1 0
framing esf
linecode b8zs
ds0-group 0 timeslots 1-24 type none service mgcp
!
controller T1 1
framing esf
clock source line primary
linecode b8zs
ds0-group 0 timeslots 1-24 type none service mgcp
!
controller T1 2
framing esf
clock source line secondary 2
linecode b8zs
ds0-group 0 timeslots 1-24 type none service mgcp
!
controller T1 3
framing esf
linecode b8zs
ds0-group 0 timeslots 1-24 type none service mgcp

!
!
voice-port 0:0
!
voice-port 1:0
!
voice-port 2:0
!
voice-port 3:0
!
!
!
!
interface Ethernet0
ip address 209.165.200.1 255.255.0.0
no ip redirects
no ip directed-broadcast
no ip mroute-cache
load-interval 30
hold-queue 4096 in
hold-queue 4096 out
!
interface FastEthernet0
no ip address
no ip directed-broadcast
no ip route-cache
no ip mroute-cache
shutdown
duplex auto
speed auto
!
ip nat translation timeout never
ip nat translation tcp-timeout never
ip nat translation udp-timeout never
ip nat translation finrst-timeout never
ip nat translation syn-timeout never
ip nat translation dns-timeout never
ip nat translation icmp-timeout never
ip classless
ip route 0.0.0.0 0.0.0.0 209.165.200.1
ip route 209.165.0.0 255.0.0.0 Ethernet0
ip route 209.165.0.0 255.255.0.0 Ethernet0
ip route 209.165.0.0 255.0.0.0 Ethernet0
ip route 209.165.254.254 255.255.255.255 1.1.0.1
no ip http server
!
!
!
!
line con 0
exec-timeout 0 0
transport input none
line aux 0
line vty 0 4
login
!
end

Command Reference

This section documents new or modified commands. All other commands used with this feature are documented in the Cisco IOS Release 12.1 command reference publications.

• clear mgcp statistics

• ds0-group

• mgcp

• mgcp block-newcalls

• mgcp call-agent

• mgcp codec

• mgcp default-package

• mgcp ip-tos

• mgcp max-waiting-delay

• mgcp package-capability

• mgcp playout

• mgcp quality-threshold

• mgcp request

• mgcp restart-delay

• mgcp vad

• show mgcp

• debug mgcp

clear mgcp statistics

To reset the MGCP statistical counters, use the clear mgcp statistics EXEC command.

Syntax Description

This command has no arguments or keywords.

Defaults

No default behavior or values.

Command Modes

EXEC

Command History

Release	Modification
12.0(7)XR2, 12.1(1)T	This command was introduced with the Cisco AS5300.

Examples

AS5300GW# clear mgcp statistics

Related Commands

Command	Description
mgcp	Starts the MGCP daemon.

ds0-group

To configure channelized T1 timeslots that enable a Cisco AS5300 modem to answer and send an analog call, use the ds0-group controller configuration command. To disable a DS0 configuration for one or more timeslots, use the no form of this command.

Syntax Description

channel-number	Specifies the DS0 group number, which can be between 0 and 23 for T1 interfaces, and from 0 to 30 for E1 interfaces.
timeslots range	Specifies the DS0 timeslot range of values from 1 to 24 for T1 interfaces, and from 1 to 31 for E1 interfaces. The default value configures 24 timeslots with the channel associated signal called E&M (Ear and Mouth), which is the default signal type.
type signaling-type	(Optional) Specifies the signaling type to be applied to the selected group. To use mgcp functionality, choose none.
tone type	(Optional) Specifies the tone type as dtmf or mf. This option is not available with signaling type none.
addr info	(Optional) Specifies the calling/called party numbers may be applied. This option is not available with signaling type none.
service service-type	(Optional) Specifies the type of service. The valid option is mgcp.

Defaults

No default behavior or values.

Command Modes

Controller CONFIG

Command History

Release	Modification
11.2	This command was originally the cas-group command.
12.0(5)T	This command was renamed.
12.0(7)XR2, 12.1(1)T	The MGCP service type was added.

Usage Guidelines

The ds0-group command replaces the existing cas-group command. Making the command generic allows flexibility and scalability. It is not restricted to CAS signaling nor channel bundling.

Be sure to specify mgcp as the service type parameter if you want to run MGCP.

Examples

AS5300(config-controller)# ds0-group 5 timeslots 1-4 type none service mgcp

Related Commands

Command	Description
cas-group	Configures channelized T1 timeslots with robbed bit signaling.

mgcp

To start and allocate resources for the MGCP daemon, use the mgcp global configuration command. To terminate all calls, release all allocated resources, and kill the MGCP daemon, use the no form of this command.

Syntax Description

port	(Optional) Specifies a UDP port for the MGCP gateway. Valid values are 1025 through 65535.

Defaults

No default behavior or values.

Command Modes

Global CONFIG

Command History

Release	Modification
12.0(7)XR2, 12.1(1)T	This command was introduced for the Cisco AS5300.

Usage Guidelines

Once you start the MGCP daemon with the mgcp command, you can suspend it (for example, for maintenance) by using the mgcp block-newcalls command. When you are ready to resume normal MGCP operations, use the no mgcp block-newcalls command. Use the no mgcp command only if you intend to kill all MGCP applications and protocols.

When the MGCP daemon is not active, all MGCP messages are ignored.

If you do not specify a port from the command line, MGCP will use UDP port 2427.

Examples

AS5300(config)# mgcp

Related Commands

Command	Description
mgcp ip-tos	Gracefully terminates all MGCP activity.
mgcp request retries	Specifies the number of times to retry sending the mgcp command.
debug mgcp	Enables debugging on MGCP.

mgcp block-newcalls

To block new calls while maintaining existing calls, use the mgcp block-newcalls global configuration command. To resume MGCP operation, use the no form of this command.

Syntax Description

This command has no arguments or keywords.

Defaults

No default behavior or values.

Command Modes

Global CONFIG

Command History

Release	Modification
12.0(7)XR2, 12.1(1)T	This command was introduced for the Cisco AS5300.

Usage Guidelines

This command is valid only if the mgcp command is enabled.

Once you issue this command, all requests for new connections (CreateConnection requests) are denied. All existing calls will be maintained until participants terminate them or you use the no mgcp command. When the last active call is terminated, the MGCP daemon will be terminated and all resources allocated to it will be released. The no mgcp block-newcalls command returns the router to normal MGCP operations.

Examples

AS5300(config)# mgcp block-newcalls

Related Commands

Command	Description
mgcp	Starts and allocates resources for the MGCP daemon.

mgcp call-agent

To configure the call agent's (media gateway controller) address, use the mgcp call-agent global configuration command. To unconfigure the call agent's address, use the no form of this command.

Syntax Description

ipaddr | hostname	Specifies the IP address or domain name of the call-agent.
port	(Optional) Specifies the port for the call-agent to use. Valid values are 1025 through 65535.

Defaults

No default behavior or values.

Command Modes

Global CONFIG

Command History

Release	Modification
12.0(7)XR2, 12.1(1)T	This command was introduced for the Cisco AS5300.

Usage Guidelines

If you do not specify a UDP port from the command line, MGCP will use 2427 as the default call agent UDP port.

Examples

See the following examples to specify the call-agent (use any one of these formats):

AS5300(config)# mgcp call-agent 209.165.200.225			
AS5300(config)# mgcp call-agent 209.165.200.225 5530
AS5300(config)# mgcp call-agent igloo
AS5300(config)# mgcp call-agent igloo 2009

Related Commands

Command	Description
mgcp ip-tos	Gracefully terminates all MGCP activity.
mgcp request retries	Specifies the number of times to retry sending the mgcp command.

mgcp codec

To select the default codec type and its optional packetization period value, use the mgcp codec global configuration command. To set the parameters to their default values, use the no form of this command.

Syntax Description

type

The types of codec supported. Valid codecs include G711alaw, G711ulaw, G723ar53, G723ar63, G723r53, G723r63, G729ar8, G729br8, G729r8

packetization-period value

(Optional) This parameter is useful when the preferred compression algorithm and/or packetization period parameter is not provided by the Media Gateway Controller. The value range depends on the type of codec selected. For example, the range for G729r8 is 10 to 220 in increments of 10. For G711ulaw, the range is 10 to 20 in increments of 10. For G723ur53, the range is 30 to 330 in increments of 10.

Defaults

G711ulaw

Command Modes

Global CONFIG

Command History

Release	Modification
12.0(7)XR2, 12.1(1)T	This command was introduced for the Cisco AS5300.

Examples

AS5300(config)# mgcp codec g711alaw
AS5300(config)# mgcp codec g729r8 packetization-period 150

Related Commands

Command	Description
mgcp	Starts the MGCP daemon.

mgcp default-package

To configure the default package capability type for the media gateway, use the mgcp default-package global configuration command.

This command does not support a no form. To change the default package, use the mgcpdefault-package command with a different, actively-supported package.

Syntax Description

as-package	Announcement server package
dtmf-package	DTMF package
gm-package	Generic media package
rtp-package	RTP package
trunk-package	Trunk package

Defaults

trunk-package

Command Modes

Global CONFIG

Command History

Release	Modification
12.0(7)XR2, 12.1(1)T	This command was introduced for the Cisco AS5300.

Usage Guidelines

This command is helpful when the Media Gateway Controller does not provide the package capability to be used for the given connection.

When configuring the package-type parameter, make sure that the specified package is actively supported. Use the show mgcp command to verify active supported packages. If the package you want as the default does not appear in the display, use the mgcp package-capability command to add the package to the supported list.

If only one package is actively supported, it becomes the default package.

Examples

AS5300GW(config)# mgcp default-package as-package
as-package type will be the new default package type.

Related Commands

Command	Description
mgcp package-capability	Includes a specific MGCP package that is supported by the gateway.
mgcp	Starts the MGCP daemon.

mgcp ip-tos

To enable or disable the IP Type of Services (TOS) for MGCP-controlled connections, use the mgcpip-tos global configuration command. To set the parameters to their default values, use the no form of this command.

Syntax Description

high-reliability	(Optional) Specifies high-reliability TOS.
high-throughput	(Optional) Specifies high-throughput TOS.
low-cost	(Optional) Specifies low-cost TOS.
low-delay	(Optional) Specifies low-delay TOS.
precedence value	(Optional) Specifies the value of the IP precedence bit. Valid values are from 0 to 7. The default IP precedence value is 3.

Defaults

Services disabled, IP precedence 3

Command Modes

Global CONFIG

Command History

Release	Modification
12.0(7)XR2, 12.1(1)T	This command was introduced for the Cisco AS5300.

Usage Guidelines

Only one of the high-reliability, high-throughput, low-cost, or low-delay parameters can be enabled at any given time. Enabling one parameter disables any other that was active. This has no effect on the precedence parameter.

When you configure a new value for precedence, the old value is erased.

The no form of the mgcp ip-tos command disables the first four parameters and sets precedence back to 3.

Examples

In the following example, activating low-delay disables the other three parameters.

AS5300GW(config)# mgcp ip-tos high-rel
AS5300GW(config)# mgcp ip-tos high-throughput
AS5300GW(config)# mgcp ip-tos low-cost 
AS5300GW(config)# mgcp ip-tos low-delay 
AS5300GW(config)# mgcp ip-tos prec 4

Related Commands

Command	Description
mgcp	Starts the MGCP daemon.

mgcp max-waiting-delay

To specify the MGCP maximum waiting delay (MWD), use the mgcp max-waiting-delay global configuration command. To set this command to its default values, use the no form of this command.

Syntax Description

value

The number of seconds to wait after restart. Valid range is 0 to 600000 milliseconds (600 seconds).

Defaults

3000 msecs

Command Modes

Global CONFIG

Command History

Release	Modification
12.0(7)XR2, 12.1(1)T	This command was introduced for the Cisco AS5300.

Usage Guidelines

Use the maximum wait delay to send out an RSIP message to the call agent with the restart method. This command helps prevent traffic bottlenecks caused by MGCP gateways all trying to connect at the same time after a restart.

Examples

The following examples show the max-waiting-delay in msecs:

AS5300(config)# mgcp max-waiting-delay 600
AS5300(config)# mgcp max-waiting-delay 2500
AS5300(config)# mgcp max-waiting-delay 300000

Related Commands

Command	Description
mgcp	Starts the MGCP daemon.
mgcp restart-delay	Configures the graceful tear down method sent in the RSIP message.

mgcp package-capability

To specify an MGCP package capability for this gateway, use the mgcp package-capability global configuration command. To remove a specific MGCP package capability from the list of capabilities, use the no form of this command.

Syntax Description

as-package	Announcement server package
dtmf-package	DTMF package
gm-package	Generic media package
rtp-package	RTP package
trunk-package	Trunk package

Defaults

None

Command Modes

Global CONFIG

Command History

Release	Modification
12.0(7)XR2, 12.1(1)T	This command was introduced for the Cisco AS5300.

Usage Guidelines

Select packages supported by your call agent. Events specified in the MGCP messages from the Call Agent must belong to one of the supported packages. Otherwise, the connection requests are refused by the media gateway.

Use this command before specifying a default package with the mgcp default-package command. Specify at least one package to have a default.

Enter each package as a separate command.

Examples

AS5300(config)# mgcp package-capability trunk-package
AS5300(config)# mgcp package-capability dtmf-package
AS5300(config)# mgcp default-package trunk-package

Related Commands

Command	Description
mgcp default-package	Configures the default package capability type for the media gateway.
mgcp	Starts the MGCP daemon.

mgcp playout

To tune the jitter buffer packet size attempted for MGCP-controlled connections, use the mgcp playout global configuration command. Use the no form of this command to restore the default value.

Syntax Description

adaptive init-value min-value max-value	Specifies a user-defined variable range (in milliseconds) for the jitter buffer packet size. The range for each value is 4 to 250. The default values are init-value 60, min-value 4, and max-value 200. Note that init-value must be between min-value and max-value.
fixed init-value	Specifies a fixed size (in milliseconds) for the jitter buffer packet size. Valid values are from 4 to 250.

Defaults

adaptive 60 4 200

No default for fixed.

Command Modes

Global CONFIG

Command History

Release	Modification
12.0(7)XR2, 12.1(1)T	This command was introduced for the Cisco AS5300.

Examples

The following example illustrates a jitter buffer configuration with an initial playout of 100, a minimum buffer size of 50, and a maximum buffer size of 150:

AS5300GW(config)# mgcp playout adaptive 100 50 150
 

The following example illustrates setting the jitter buffer to a fixed playout of 120:

AS5300GW(config)# mgcp playout fixed 120

Related Commands

Command	Description
mgcp	Starts the MGCP daemon.

mgcp quality-threshold

To set the jitter buffer size threshold, packet-loss threshold, and latency threshold parameters, use the mgcp quality-threshold global configuration command. To restore the default parameter values, use the no form of this command.

Syntax Description

hwm-jitter-buffer value	Specifies the high-water-mark jitter buffer size. Valid range is from 100 to 200, and the default value is 150.
hwm-latency value	Specifies the high-water-mark latency value. Valid range is from 250 to 400, and the default value is 300.
hwm-packet-loss value	Specifies the high-water-mark packet-loss value. Valid range is from 5000 to 25000, and the default value is 10000.
lwm-jitter-buffer value	Specifies the low-water-mark jitter buffer size. Valid range is from 4 to 60, and the default value is 30.
lwm-latency value	Specifies the low-water-mark latency value. Valid range is from 125 to 200, and the default value is 150.
lwm-packet-loss value	Specifies the low-water-mark packet-loss value. Valid range is from 1 to 3000, and the default value is 1000.

Defaults

The voice quality parameter defaults are (in milliseconds): hwm-jitter-buffer 150, hwm-latency 300, hwm-packet-loss 10000, lwm-jitter-buffer 30, lwm-latency 300, and lwm-packet-loss 1000.

Command Modes

Global CONFIG

Command History

Release	Modification
12.0(7)XR2, 12.1(1)T	This command was introduced for the Cisco AS5300.
11.3(3)T	The default was changed to 100 milliseconds.

Usage Guidelines

The jitter buffer (storage area containing an active call's voice packets that have been received from the network and are waiting to be decoded and played), packet loss (number of packets lost per 100000 packets for a given call), and latency (network delay in sending/receiving packets) parameters are directly related to the quality of voice calls. For good voice quality, the system should perform below the lwm values. As the values go higher, voice quality degrades. The system generates a report when the values go above the hwm levels. Set the hwm and lwm values sufficiently apart so that you receive reports on poor performance, but not so close together that you receive too much feedback.

Enter each parameter as a separate command.

Examples

The following examples show how the different parameters can be set to new values:

AS5300GW(config)# mgcp quality-thres hwm-jit 100
AS5300GW(config)# mgcp quality-thres hwm-lat 250
AS5300GW(config)# mgcp quality-thres hwm-pack 5000
AS5300GW(config)# mgcp quality-thres lwm-jit 50
AS5300GW(config)# mgcp quality-thres lwm-lat 200
AS5300GW(config)# mgcp quality-thres lwm-pack 20

mgcp request retries

To specify the number of times to retry sending the mgcp command, use the mgcp request retries global configuration command. To restore the default value, use the no form of this command.

Syntax Description

count

Specifies the number of times a Notify message is retransmitted to the Call Agent before the request is dropped. The valid range is 1 to 10.

Defaults

3 times

Command Modes

Global CONFIG

Command History

Release	Modification
12.0(7)XR2, 12.1(1)T	This command was introduced for the Cisco AS5300.

Usage Guidelines

This command applies to a trunking gateway.

Examples

The following example shows that the system will try to send the mgcp command 10 times before dropping the request:

AS5300(config)# mgcp request retries 10

Related Commands

Command	Description
mgcp request timeout	Specifies how long the system will wait for a reply to a request.
mgcp	Starts the MGCP daemon.

mgcp request timeout

To specify how long the system waits for a response to a request, use the mgcp request timeout global configuration command. To restore the default value, use the no form of this command.

Syntax Description

timeout

Specifies the number of milliseconds to wait for a response to a request. Valid range is 1 to 10,000 (10 seconds).

Defaults

500 milliseconds

Command Modes

Global CONFIG

Command History

Release	Modification
12.0(7)XR2, 12.1(1)T	This command was introduced for the Cisco AS5300.

Examples

The following example shows that the system waits 40 milliseconds for a reply to a request:

AS5300(config)# mgcp request timeout 40

Related Commands

Command	Description
mgcp request retries	Specifies the number of times to retry sending the mgcp command.
mgcp	Starts the MGCP daemon.

mgcp restart-delay

To select the delay value sent in the RSIP graceful tear down method, use the mgcp restart-delay global configuration command. To restore the default value, use the no form of this command.

Syntax Description

value

Specifies the restart delay value in seconds. Valid range is from 0 to 600.

Defaults

0 seconds

Command Modes

Global CONFIG

Command History

Release	Modification
12.0(7)XR2, 12.1(1)T	This command was introduced for the Cisco AS5300.

Usage Guidelines

Use the restart value to send a restart in progress (RSIP) message indicating when the connection in the gateway will be torn down.

Examples

AS5300GW(config)# mgcp restart-delay 30

Related Commands

Command	Description
mgcp	Starts the MGCP daemon.
mgcp max-waiting-delay	Specifies the MGCP maximum waiting delay (MWD) after a restart.

mgcp vad

To set the default voice activity detection (VAD) parameter for MGCP, use the mgcp vad global configuration command. To disable the VAD parameter, use the no form of this command.

Syntax Description

This command has no arguments or keywords.

Defaults

Disabled

Command Modes

Global CONFIG

Command History

Release	Modification
12.0(7)XR2, 12.1(1)T	This command was introduced for the Cisco AS5300.

Usage Guidelines

Use the MGCP voice activity detection (VAD) parameter to tell the MGCP gateway to turn silence suppression on or off.

Examples

AS5300GW(config)# mgcp vad

Related Commands

Command	Description
mgcp	Starts the MGCP daemon.

show mgcp

To display MGCP configuration information, use the show mgcp EXEC command.

Syntax Description

connection	(Optional) Displays the active MGCP-controlled connections.
endpoint	(Optional) Displays the MGCP-controlled endpoints.
statistics	(Optional) Displays MGCP statistics.

Command Modes

EXEC

Command History

Release	Modification
12.0(7)XR2, 12.1(1)T	This command was introduced for the Cisco AS5300.

Examples

AS5300# show mgcp 
MGCP Admin State ACTIVE, Oper State ACTIVE - Cause Code NONE
MGCP call-agent: 1.14.167.3, mgcp block-newcalls enabled? FALSE
MGCP request timeout 500, MGCP request retries 3
MGCP gateway port: 2427, MGCP maximum waiting delay 180
MGCP restart delay 180, MGCP vad DISABLED
MGCP simple-sdp DISABLED, MGCP cisco fgdos DISABLED
MGCP codec type G711ulaw, MGCP packetization period 20
MGCP JB threshold lwm 30, JB threshold hwm 150
MGCP LAT threshold lwm 150, LAT threshold hwm 300
MGCP PL threshold lwm 1000, PL threshold hwm 5000
MGCP playout mode is adaptive 60, 4, 200 in msec
MGCP IP ToS low delay disabled, MGCP IP ToS high throughput disabled
MGCP IP ToS high reliability disabled, MGCP IP ToS low cost disabled
MGCP IP precedence 0, MGCP default package: trunk-package
MGCP supported packages: trunk-package as-package

AS5300# show mgcp connection
Endpoint        Call_ID(C) Conn_ID(I) (P)ort (M)ode (S)tate (C)odec (E)vent[SIFL] (R)esult[EA]
1. S0/DS1-0/1   C=100,1,2  I=0x2  P=16730,16436  M=3  S=4  C=6 E=2,0,0,2  R=0,0
2. S0/DS1-0/2   C=100,3,4  I=0x3  P=16436,16730  M=3  S=4  C=6 E=0,0,0,0  R=0,0
 
Total number of active calls 2
 

AS5300# show mgcp statistics
 UDP pkts rx 3, tx 8
 Unrecognized rx pkts 0, MGCP message parsing errors 0
 Duplicate MGCP ack tx 0, Invalid versions count 0
 CreateConn rx 2, successful 2, failed 0
 DeleteConn rx 0, successful 0, failed 0
 ModifyConn rx 1, successful 1, failed 0
 DeleteConn tx 0, successful 0, failed 0
 NotifyRequest rx 0, successful 0, failed 0
 AuditConnection rx 0, successful 0, failed 0
 AuditEndpoint rx 0, successful 0, failed 0
 RestartInProgress tx 1, successful 1, failed 0
 Notify tx 0, successful 0, failed 0
 ACK tx 3, NACK tx 0
 ACK rx 0, NACK rx 0
 
 IP address based Call Agents statistics:
 IP address 209.165.200.224, Total msg rx 3,
                  successful 3, failed 0
 

The following example shows how endpoints are configured:

AS5300# show mgcp endpoint
T1/0 ds0-group 0 timeslots 1-24 type none
T1/1 ds0-group 0 timeslots 1-24 type none
T1/2 ds0-group 0 timeslots 1-24 type none
T1/3 ds0-group 0 timeslots 1-24 type none
 

Related Commands

Command	Description
mgcp	Starts the MGCP daemon.

Debug Commands

This section documents new or modified debug commands. All other commands used with this feature are documented in the Cisco IOS Release 12.0 command reference publications.

debug mgcp

To enable debug traces for errors, events, packets, and parser, use the debug mgcp privileged EXEC command. To disable debugging output, use the no form of this command.

Syntax Description

all	(Optional) Debugs errors, events, packets, and the parser for MGCP modules.
errors	(Optional) Debugs errors for MGCP modules.
events	(Optional) Debugs events for MGCP modules.
packets	(Optional) Debugs packets for MGCP modules.
parser	(Optional) Debugs the parser for MGCP modules.

Defaults

Debugging for DRiP packets is not enabled.

Command Modes

EXEC

Command History

Release	Modification
12.0(7)XR2, 12.1(1)T	This command was introduced for the Cisco AS5300.

Examples

AS5300GW# debug mgcp parser
Media Gateway Control Protocol parser debugging is on
AS5300GW# no debug mgcp parser
Media Gateway Control Protocol parser debugging is off
 

Related Commands

Command	Description
mgcp	Starts the MGCP daemon.

Glossary

API ---Application Programming Interface.

CA ---Call Agent.

CAS--- Channel Associated Signaling.

CCS ---Common Channel Signaling.

CCAPI ---Call Control API.

CLI--- Command-Line Interface.

Dial Plan ---A scheme, specified by the networking manager, for associating telephone dialing sequences with VoIP endpoints.

IOS ---Internetworking Operating System.

IP ---Internet Protocol.

ISDN ---Integrated Services Digital Network.

MG ---Media Gateway.

MGC ---Media Gateway Controller.

MGCP ---Media Gateway Control Protocol.

PRI ---Primary Rate Interface.

PSTN ---Public Switched Telephone Network.

QoS ---Quality of Service.

RSIP ---ReStart In Progress.

RTCP ---Real Time Control Protocol.

SGCP---Simple Gateway Control Protocol.

SNMP--- Simple Network Management Protocol.

UDP ---User Datagram Protocol.

VAD ---Voice Activity Detection.

VoIP--- Voice over Internet Protocol.

VTSP ---Voice Telephony Service Provider.

XGCP---Xternal Media Gateway Control Protocols, includes SGCP and MGCP.

Posted: Thu Mar 30 13:57:09 PST 2000
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