Cisco IOS Voice Troubleshooting and Monitoring -- MGCP Testing Commands

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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

MGCP show Commands

The show commands are useful for displaying the current status of the configuration as well as verifying that the changes that you made took effect. The following commands are described:

Details about these commands can be found in the Cisco IOS Voice Command Reference.

show ccm-manager

If your MGCP network includes Cisco CallManager, use this command to verify the active and redundant configured Cisco CallManager servers. This command also indicates if the gateway is currently registered with Cisco CallManager.

Note Note: The following show ccm-manager command output was captured in a separated environment.
Router# show ccm-manager
MGCP Domain Name: Router
Total number of host: 2
Priority Status Host
============================================================
Primary Registered 10.89.129.210
First backup Backup ready 10.89.129.211
Second backup Undefined 
Current active Call Manager: 10.89.129.210
Current backup Call Manager: 10.89.129.211
Redundant link port: 2428
Failover Interval: 30 seconds
Keepalive Interval: 15 seconds
Last keepalive sent: 1d00h (elapsed time: 00:00:03)
Last MGCP traffic time: 1d00h (elapsed time: 00:00:03)
Last switchover time: 04:49:39 from (10.89.129.211)
Switchback mode: Graceful

show mgcp

Use this command to verify the status of the router's MGCP parameters. You should see the IP address of the server that you are using (172.16.1.252 in this case.) All of the other parameters were left at their default behavior in this configuration.

VG200A# show mgcp
MGCP Admin State ACTIVE, Oper State ACTIVE - Cause Code NONE
MGCP call-agent: 172.16.1.252  Initial protocol service is MGCP
MGCP block-newcalls DISABLED
MGCP dtmf-relay codec all mode out-of-band
MGCP modem passthrough:  CA
MGCP request timeout 500, MGCP request retries 3
MGCP gateway port: 2427, MGCP maximum waiting delay 3000
MGCP restart delay 0, MGCP vad DISABLED
MGCP simple-sdp ENABLED
MGCP codec type g711ulaw, MGCP packetization period 20
MGCP JB threshold lwm 30, MGCP JB threshold hwm 150
MGCP LAT threshold lmw 150, MGCP LAT threshold hwm 300
MGCP PL threshold lwm 1000, MGCP PL threshold hwm 10000
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 5, MGCP default package: line-package
MGCP supported packages: gm-package dtmf-package trunk-package line-package
                         hs-package
VG200A#
Table: Explanation of Fields in the show mgcp Command
Field Output Description

MGCP Admin State ...

The administrative and operational state of the MGCP daemon. The administrative state controls starting and stopping the application using the mgcp and mgcp block-newcalls commands. The operational state controls normal MGCP operations.

MGCP call-agent

The address of the call agent specified in the mgcp command.

MGCP block-newcalls enabled

The state of the mgcp block-newcalls command.

MGCP request timeout

The setting for the mgcp request timeout command.

MGCP request retries

The setting for the mgcp request retries command.

MGCP gateway port

The UDP port specification.

MGCP maximum waiting delay

The setting for the mgcp max-waiting-delay command.

MGCP restart delay

The setting for the mgcp restart-delay command.

MGCP VAD

The setting for the mgcp vad command.

MGCP codec type

The setting for the mgcp codec command.

MGCP packetization period

The packetization period parameter setting for the mgcp codec command.

MGCP JB threshold low water mark

The jitter buffer minimum threshold parameter setting for the mgcp quality-threshold command.

JB threshold high water mark

The jitter buffer maximum threshold parameter setting for the mgcp quality-threshold command.

MGCP LAT threshold low water mark

The latency minimum threshold parameter setting for the mgcp quality-threshold command.

LAT threshold high water mark

The latency maximum threshold parameter setting for the mgcp quality-threshold command.

MGCP PL threshold low water mark

The packet loss minimum threshold parameter setting for the mgcp quality-threshold command.

PL threshold high water mark

The packet loss minimum threshold parameter setting for the mgcp quality-threshold command.

MGCP IP ToS low delay

The low-delay parameter setting for the mgcp ip-tos command.

MGCP IP ToS high throughput

The high-throughput parameter setting for the mgcp ip-tos command.

MGCP IP ToS high reliability

The high-reliability parameter setting for the mgcp ip-tos command.

MGCP IP ToS low cost

The low-cost parameter setting for the mgcp ip-tos command.

MGCP IP precedence

The precedence parameter setting for the mgcp ip-tos command.

MGCP default package type

The default-package parameter setting for the mgcp default-package command.

Supported MGCP packages

The packages supported in this session.

show mgcp endpoint

Use this command to show the voice ports (endpoints) that are under MGCP control in the router. This command verifies which voice ports have been bound to the MGCP application. This is related to the application mgcp command and the port commands that were entered when configuring the POTS dial peer.

VG200A#show mgcp endpoint
voice-port 1/0/0
voice-port 1/0/1
voice-port 1/1/0
voice-port 1/1/1
VG200A#

show mgcp connection

Use this command to display any active MGCP connections. The endpoint in this example is Slot1/Module 1/Port 0. This corresponds to the MGCP Member Configuration identifier in Cisco CallManager. This tells you which port on the router is the endpoint in the call.

In the screen output below there is one active call.

VG200A#show mgcp connection
Endpoint         Call_ID(C)               Conn_ID(I) (P)ort     (M)ode (S)tate (C)odec EC   
(R)esult[EA]
1. aaln/S1/SU1/0 C=A000000001000008,23,24 I=0xD       P=16390,0  M=4    S=4,4   CO=1   
EC=1  R=0,0
Total number of active calls 1
VG200A#
Table: Explanation of Fields in the show mgcp connection Command
Field Output Description

Endpoint

The endpoint for each call shown in the digital endpoint naming convention of slot number (S0) and digital line (DS1-0) number (1).

Call_ID(C)

The MGCP call ID send by the call agent, the internal Call Control Application Programming Interface (CCAPI) call ID for this endpoint, and the peer call legs CCAPI call ID.


(CCAPI is an API to provide call control facilities to applications.)

Conn_ID(I)

The connection ID generated by the gateway and sent in the ACK message.

(P)ort

The ports used for this connection. The first port is the local UDP port. The second port is the remote UDP port.

(M)ode

The call mode, where:


0-Indicates an invalid value for mode.


1-Indicates the gateway should only send packets.


2-Indicates the gateway should only receive packets.


3-Indicates the gateway can send and receive packets.


4-Indicates the gateway should neither send nor receive packets.


5-Indicates the gateway should place the circuit in loopback mode.


6-Indicates the gateway should place the circuit in test mode.


7-Indicates the gateway should use the circuit for network access for data.


8-Indicates the gateway should place the connection in network loopback mode.


9-Indicates the gateway should place the connection in network continuity test mode.


10-Indicates the gateway should place the connection in conference mode.


All other values are used for internal debugging.

(S)tate

The call state. The values are used for internal debugging purposes.

(C)odec

The codec identifier. The values are used for internal debugging purposes.

(E)vent [SIFL]

Used for internal debugging.

(R)esult [EA]

Used for internal debugging.

show voice port mod_num/slot_num/port_num

Use this command to verify the current status and configuration of the voice ports on the router.

The following is sample output from the show voice port command for a foreign exchange office (FXO) voice port:

VG200A#show voice port 1/0/0
Foreign Exchange Office 1/0/0 Slot is 1, Sub-unit is 0, Port is 0
 Type of VoicePort is FXO
 Operation State is DORMANT
 Administrative State is UP
 No Interface Down Failure
 Description is not set
 Noise Regeneration is enabled
 Non Linear Processing is enabled
 Music On Hold Threshold is Set to -38 dBm
 In Gain is Set to 0 dB
 Out Attenuation is Set to 0 dB
 Echo Cancellation is enabled
 Echo Cancel Coverage is set to 8 ms
 Playout-delay Mode is set to default
 Playout-delay Nominal is set to 60 ms
 Playout-delay Maximum is set to 200 ms
 Connection Mode is normal
 Connection Number is not set
 Initial Time Out is set to 10 s
 Interdigit Time Out is set to 10 s
 Ringing Time Out is set to 180 s
 Companding Type is u-law
 Region Tone is set for US
 Analog Info Follows:
 Currently processing none
 Maintenance Mode Set to None (not in mtc mode)
 Number of signaling protocol errors are 0
 Impedance is set to 600r Ohm
 Wait Release Time Out is 30 s
 Station name None, Station number None
 Voice card specific Info Follows:
 Signal Type is loopStart
 Number Of Rings is set to 1
 Supervisory Disconnect active
 Hook Status is On Hook
 Ring Detect Status is inactive
 Ring Ground Status is inactive
 Tip Ground Status is inactive
 Dial Type is dtmf
 Digit Duration Timing is set to 100 ms
 InterDigit Duration Timing is set to 100 ms
 Pulse Rate Timing is set to 10 pulses/second
 InterDigit Pulse Duration Timing is set to 750 ms
 Percent Break of Pulse is 60 percent
 GuardOut timer is 2000 ms
VG200A#

The following is sample output from the show voice port command for a foreign exchange station (FXS) voice port:

VG200A#show voice port 1/1/0
Foreign Exchange Station 1/1/0 Slot is 1, Sub-unit is 1, Port is 0
 Type of VoicePort is FXS
 Operation State is DORMANT
 Administrative State is UP
 No Interface Down Failure
 Description is not set
 Noise Regeneration is enabled
 Non Linear Processing is enabled
 Music On Hold Threshold is Set to -38 dBm
 In Gain is Set to 0 dB
 Out Attenuation is Set to 0 dB
 Echo Cancellation is enabled
 Echo Cancel Coverage is set to 8 ms
 Playout-delay Mode is set to default
 Playout-delay Nominal is set to 60 ms
 Playout-delay Maximum is set to 200 ms
 Connection Mode is normal
 Connection Number is not set
 Initial Time Out is set to 10 s
 Interdigit Time Out is set to 10 s
 Ringing Time Out is set to 180 s
 Companding Type is u-law
 Region Tone is set for US
 Analog Info Follows:
 Currently processing none
 Maintenance Mode Set to None (not in mtc mode)
 Number of signaling protocol errors are 0
 Impedance is set to 600r Ohm
 Wait Release Time Out is 30 s
 Station name None, Station number None
 Voice card specific Info Follows:
 Signal Type is loopStart
 Ring Frequency is 25 Hz
 Hook Status is On Hook
 Ring Active Status is inactive
 Ring Ground Status is inactive
 Tip Ground Status is inactive
 Digit Duration Timing is set to 100 ms
 InterDigit Duration Timing is set to 100 ms
 Ring Cadence is defined by CPTone Selection
 Ring Cadence are [20 40] * 100 msec
VG200A#
Table: Explanation of Fields in the show voice port Command
Field Output Description

Administrative State

Administrative state of the voice port.

Alias

User-supplied alias for this voice port.

Clear Wait Duration Timing

Time of inactive seizure signal to declare call cleared.

Connection Mode

Connection mode of the interface

Connection Number

Full E.164 telephone number used to establish a connection with the trunk or PLAR mode.

Currently Processing

Type of call currently being processed: none, voice, or fax.

Delay Duration Timing

Maximum delay signal duration for delay dial signaling.

Delay Start Timing

Timing of generation of delayed start signal from detection of incoming seizure.

Dial Type

Out-dialing type of the voice port.

Digit Duration Timing

DTMF Digit duration in milliseconds.

E&M Type

Type of E&M interface.

Echo Cancel Coverage

Echo Cancel Coverage for this port.

Echo Cancellation

Whether or not echo cancellation is enabled for this port.

Hook Flash Duration Timing

Maximum length of hook flash signal.

Hook Status

Hook status of the FXO/FXS interface.

Impedance

Configured terminating impedance for the E&M interface.

In Gain

Amount of gain inserted at the receiver side of the interface.

In Seizure

Incoming seizure state of the E&M interface.

Initial Time Out

Amount of time the system waits for an initial input digit from the caller.

InterDigit Duration Timing

DTMF interdigit duration in milliseconds.

InterDigit Pulse Duration Timing

Pulse dialing interdigit timing in milliseconds.

Interdigit Time Out

Amount of time the system waits for a subsequent input digit from the caller.

Maintenance Mode

Maintenance mode of the voice-port.

Music On Hold Threshold

Configured Music-On-Hold Threshold value for this interface.

Noise Regeneration

Whether or not background noise should be played to fill silent gaps if VAD is activated.

Number of signaling protocol errors

Number of signaling protocol errors.

Non-Linear Processing

Whether or not Non-Linear Processing is enabled for this port.

Operations State

Operation state of the port.

Operation Type

Operation of the E&M signal: 2-wire or 4-wire.

Out Attenuation

Amount of attenuation inserted at the transmit side of the interface.

Out Seizure

Outgoing seizure state of the E&M interface.

Port

Port number for this interface associated with the voice interface card.

Pulse Rate Timing

Pulse dialing rate in pulses per second (pps).

Regional Tone

Configured regional tone for this interface.

Ring Active Status

Ring active indication.

Ring Frequency

Configured ring frequency for this interface.

Ring Ground Status

Ring ground indication

Signal Type

Type of signaling for a voice port: loop-start, ground-start, wink-start, immediate, and delay-dial.

Slot

Slot used in the voice interface card for this port.

Sub-unit

Sub-unit used in the voice interface card for this port.

Tip Ground Status

Tip ground indication.

Type of VoicePort

Type of voice port: FXO, FXS, and E&M.

The Interface Down Failure Cause

Text string describing why the interface is down.

Wink Duration Timing

Maximum wink duration for wink start signaling.

Wink Wait Duration Timing

Maximum wink wait duration for wink start signaling.

show mgcp statistics

Use this command to show statistical information related to MGCP activity on the router.

The following is sample output from a 28xx router with IOS 12.4(22)T

2851#sh mgcp statistics 
 UDP pkts rx 28349, tx 28576
 Unrecognized rx pkts 0, MGCP message parsing errors 0
 Duplicate MGCP ack tx 1, Invalid versions count 0
 CreateConn rx 353, successful 353, failed 0
 DeleteConn rx 353, successful 353, failed 0
 ModifyConn rx 629, successful 629, failed 0
 DeleteConn tx 0, successful 0, failed 0
 NotifyRequest rx 217, successful 217, failed 0
 AuditConnection rx 0, successful 0, failed 0
 AuditEndpoint rx 263, successful 233, failed 30
 RestartInProgress tx 27, successful 27, failed 0
 Notify tx 26530, successful 26530, failed 0
 ACK tx 1785, NACK tx 30
 ACK rx 26533, NACK rx 0
 Collisions: Passive 0, Active 0

 IP address based Call Agents statistics:
 IP address 10.10.14.36, Total msg rx 28349,
                  successful 28318, failed 30
 System resource check is DISABLED. No available statistic

 DS0 Resource Statistics
 -----------------------
 Utilization: 3.33 percent           <-- E1 utilization
 Total channels: 60                  <-- two E1 whereas one port shutdown
 Addressable channels: 30            <-- just on E1 operational
 Inuse channels: 1                   <-- currently used channels
 Disabled channels: 30               <-- second E1 not operational
 Free channels: 29                   <-- available channels 


The following is sample output from Voice Gateway VG200:

VG200A#show mgcp statistics
 UDP pkts rx 3791, tx 3830
 Unrecognized rx pkts 0, MGCP message parsing errors 0
 Duplicate MGCP ack tx 0, Invalid versions count 0
 CreateConn rx 12, successful 12, failed 0
 DeleteConn rx 12, successful 12, failed 0
 ModifyConn rx 42, successful 42, failed 0
 DeleteConn tx 0, successful 0, failed 0
 NotifyRequest rx 8, successful 8, failed 0
 AuditConnection rx 0, successful 0, failed 0
 AuditEndpoint rx 20, successful 20, failed 0
 RestartInProgress tx 6, successful 6, failed 0
 Notify tx 3704, successful 3704, failed 0
 ACK tx 68, NACK tx 0
 ACK rx 3703, NACK rx 0
 IP address based Call Agents statistics:
 IP address 172.16.1.252, Total msg rx 3791,
                  successful 3791, failed 0
VG200A# 
Table: Explanation of Fields in the show mgcp statistics Command
Field Output Description

UDP pkts

The number of UDP packets received (rx) and transmitted (tx).

Unrecognized rx pkts

The number of packets received that are of unknown type.

MGCP message parsing errors

The number of MGCP message parsing errors.

Duplicate MGCP ack tx

The number of duplicate MGCP ACK transmission messages.

Invalid versions count

The number of invalid versions.

CreateConn rx ...

The number of Create Connection messages received from the call agent by the media gateway. Messages received are classified as being successful or failed.

DeleteConn rx ...

The number of Delete Connection messages received from the call agent by the media gateway. Messages received are classified as being successful or failed.

ModifyConn rx ...

The number of Modify Connection messages received from the call agent by the media gateway. Messages received are classified as being successful or failed.

DeleteConn tx ...

The number of Delete Connection messages sent by the call agent. Messages received are classified as being successful or failed.

NotifyRequest rx ...

The number of Notify messages received by the call agent from the media gateway. Messages received are classified as being successful or failed.

AuditConnection rx ...

The number of Audit Connection messages received from the call agent by the media gateway. Messages received are classified as being successful or failed.

AuditEndpoint rx ...

The number of Audit Endpoint messages received from the call agent by the media gateway. Messages received are classified as being successful or failed.

RestartInProgress tx ...

The number of Restart In Progress (RSIP) messages transmitted by the call agent. Messages received are classified as being successful or failed.

Notify tx ...

The number of Notify messages transmitted by the call agent. Messages received are classified as being successful or failed.

ACK tx ...

The number of acknowledgement messages transmitted by the call agent.

NACK tx ...

The number of negative acknowledgement messages transmitted by the call agent.

ACK rx ...

The number of acknowledgement messages received by the gateway.

NACK rx ...

The number of negative acknowledgement messages received by the gateway.

IP address

The IP address of the call agent.

Total msg rx ...

The total number of messages received by the gateway. Messages received are classified as being successful or failed.

Other debug mgcp Commands

Use debug mgcp {all | error | events | packets | parser} when you are experiencing problems that you believe are not related to configuration errors or hardware problems. It is recommended that you keep an example of each debug command from a working configuration to use as a baseline for comparison when you are experiencing problems.

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