Pankaj Bhagchandani G,Pankaj G Bhagchandani G,G Pankaj Bhagchandani G,G Pankaj G Bhagchandani: July 2014

Thursday, 31 July 2014

Voice over internet protocol ,Pankaj G Bhagchandani G, G Pankaj G Bhagchandani, pankaj Bhagchandani G

Sample Output from the show voice iec description Command: Example

Router# show voice iec description 1.1.128.1.5.0

    IEC Version:1

    Entity:1 (Gateway)

    Category:128 (Destination address resolution failure)

    Subsystem:1 (CCAPI)

    Error:5 (No dial peer match)

    Diagnostic Code:0

Sample Output from the show voice statistics iec Command: Example

Router# show voice statistics iec since-reset

Internal Error Code counters

----------------------------

Counters since last reset (2002-11-28T01:55:31Z):

  SUBSYSTEM CCAPI [subsystem code 1]

      [errcode   6] No DSP resource                            5

  SUBSYSTEM SSAPP [subsystem code 4]

      [errcode   5] No dial peer match                          2

      [errcode   3] CPU high                                  96

  SUBSYSTEM H323 [subsystem code 5]

      [errcode  22] No Usr Responding, H225 timeout            1

      [errcode 27] H225 invalid msg                           1

      [errcode 79] H225 chn, sock fail                       27

  SUBSYSTEM VTSP [subsystem code 9]

      [errcode   6] No DSP resource                           83

Router# show voice statistics iec since-reboot

Internal Error Code counters

----------------------------

Counters since reboot:

  SUBSYSTEM CCAPI [subsystem code 1]

      [errcode   6] No DSP resource                           93

  SUBSYSTEM SSAPP [subsystem code 4]

      [errcode   5] No dial peer match                        830

      [errcode   3] CPU high                                1423

  SUBSYSTEM H323 [subsystem code 5]

      [errcode  21] No Usr Responding, H225 timeout           21

      [errcode  23] H225 invalid msg                          17

      [errcode  39] H225 chn, sock fail                     2073

  SUBSYSTEM VTSP [subsystem code 9]

      [errcode   6] No DSP resource                          429

Before using the show voice statistics iec interval command, first determine the intervals available for display by using the show voice statistics interval-tag command:

Router# show voice statistics interval-tag

Current Time:2002-11-28T06:04:21Z

INTERVAL-TAG   START TIME             END TIME

============== ====================== ======================

1              2002-11-28T02:00:00Z   2002-11-28T02:30:01Z

2              2002-11-28T02:30:01Z   2002-11-28T03:00:01Z

3              2002-11-28T03:00:01Z   2002-11-28T03:30:01Z

4              2002-11-28T03:30:01Z   2002-11-28T04:00:01Z

5              2002-11-28T04:00:01Z   2002-11-28T04:30:01Z

6              2002-11-28T04:30:01Z   2002-11-28T05:00:01Z

7              2002-11-28T05:00:01Z   2002-11-28T05:30:01Z

8              2002-11-28T05:30:01Z   2002-11-28T06:00:01Z

9              2002-11-28T06:00:01Z   2002-11-28T06:04:21Z

The following example shows interval-tag 8 statistics:

Router# show voice statistics iec interval 8

Internal Error Code counters

----------------------------

Counters for interval 8, beginning 2002-11-28T05:30:01Z,ending 2002-11-28T06:00:01Z:

  SUBSYSTEM CCAPI [subsystem code 1]

      [errcode   6] No DSP resource                            1

  SUBSYSTEM SSAPP [subsystem code 4]

      [errcode   3] CPU high                                  15

  SUBSYSTEM H323 [subsystem code 5]

      [errcode  23] H225 invalid msg                           1

      [errcode  39] H225 chn, sock fail                        1

  SUBSYSTEM VTSP [subsystem code 9]

      [errcode   6] No DSP resource                            6

Sample Output from the clear voice statistics Command: Example

The following examples show voice statistics iec since-reset output before and after you issue the clear voice statistics command:

Router# show voice statistics iec since-reset

Internal Error Code counters

----------------------------

Counters since last reset (2002-11-28T01:55:31Z):

  SUBSYSTEM CCAPI [subsystem code 1]

      [errcode   6] No DSP resource                            5

  SUBSYSTEM SSAPP [subsystem code 4]

      [errcode   5] No dial peer match                          2

      [errcode   3] CPU high                                  96

  SUBSYSTEM H323 [subsystem code 5]

      [errcode  21] No Usr Responding, H225 timeout            1

      [errcode  23] H225 invalid msg                           1

      [errcode  39] H225 chn, sock fail                       27

  SUBSYSTEM VTSP [subsystem code 9]

      [errcode   6] No DSP resource                           83

Router# clear voice statistics iec

Router# show voice statistics iec since-reset

        Internal Error Code counters

        ----------------------------

        Counters since last reset (2002-12-12T22:33:25Z):

        No errors.

Voice over internet protocol ,G Pankaj G Bhagchandani, pankaj Bhagchandani G,Pankaj G Bhagchandani G,

Sample Output from the show voice cause-code category-q850 Command: Example

Router# show voice cause-code category-q850

The Internal Error Category to Q850 cause code mapping table:-

 Error Configured Default    Description

Category  Q850     Q850

   128     27        3  Destination address resolution failure

   129     38      102  Call setup timeout

   178     41       41  Internal Communication Error

   179     41       41  External communication Error

   180     47       47  Software Error

   181     47       47  Software Resources Unavailable

   182     47       47  Hardware Resources Unavailable

   183     41       41  Capability Exchange Failure

   184     49       49  QoS Error

   185     41       41  RTP/RTCP receive timer expired or bearer layer failure

   186     38       38  Signaling socket failure

   187     38       38  Gateway or signaling interface taken out of service

   228     50       50  User is denied access to this service

   278     65       65  Media Negotiation Failure due to non-existing Codec

Troubleshooting VoIP Networks Using Cisco VoIP Internal Error Codes

IECs are generated for errors that cause the gateway to release or refuse a call. This section provides procedural and reference information used to troubleshoot gateway-detected errors and resolve problems on the gateway and with other VoIP network entities.

Because fields within the IEC identify which network entity and subsystem originated an error, they can be used to diagnose and isolate failures that can cause call disconnects.

This section discusses troubleshooting scenarios using IECs to diagnose and resolve the problems described in the following sections:

•

Troubleshooting Two-Stage Dialing Failures

•

Troubleshooting Socket Failures

Troubleshooting Two-Stage Dialing Failures

The following example shows how to troubleshoot a two-stage dialing failure.

Symptom

The Cisco router or gateway rejects a call placed by a PSTN ISDN user after all the digits have been dialed.

Problem Description

The PSTN user enters a destination number that is routed through the PSTN ISDN switch, which sends an ISDN SETUP message to the router. The router tags the incoming call leg and sends back an ISDN CONNECT message. The caller receives second dial tone. The router then enters the digit collection stage to use the collected digits to route the call to the next hop, at which point the router rejects the call.

Troubleshooting Tasks

Perform the following steps to determine the reason for call failure.

Step 1

Use the voice iec syslog command to enable displaying of IECs as they are encountered in real-time.

Step 2

Use the voice iec statistics type iec command to configure the collection of IEC statistics.

Step 3

Use the show running-config command to verify IEC, ISDN, and dial-peer configuration, as shown in the following partial sample output:

Router> show running-config

Building configuration...

voice rtp send-recv

voice service voip

The following lines show the IEC configuration:

voice iec syslog

no voice hpi capture buffer

no voice hpi capture destination

voice statistics type iec

The following lines show the T1 configuration:

controller T1 0

 framing esf

 clock source line primary

 linecode b8zs

 cablelength short 133

 pri-group timeslots 1-24

The following lines show the ISDN configuration:

interface Serial0:23

 no ip address

 no logging event link-status

 isdn switch-type primary-ni

 isdn incoming-voice modem

 no cdp enable

The following lines show the dial-peer configuration. Because the dial-peer voice 1 is not configured for direct inward dialing (DID), the inbound call leg is considered to be configured for two-stage dialing, and the router returns a second dial tone.