Re: MGCP Gateway With ISDN BRI interface

suthakar sundaralingam · ‎11-15-2013

Hi Guys,

I have a voice gateway with a BRI card on slot 0/3/0 (port 0/1) and I wanted to terminate both WAN and PSNT connection to the same gateway with MGCP protocol, and as I'm new to voice over IP world can anyone suggest/recommand me a proper guide which includes the stepts and proper explanations to acheive this task.

Thank you

Regards,

Suthakar

Chris Deren · ‎11-15-2013

My recommendation would be not to bother with MGCP and use SIP instead. Much easier to troubleshoot, more reliable and preferred these days.

Chris

Sent from Cisco Technical Support iPhone App

Murali Dharan · ‎11-15-2013

If you are very good in DATA network then its very simple to configure MGCP on it.

1) Make sure you have routing to the VOIP network to the HQ.

2) MGCP configuration can be done with in 4 steps.

4) You must configure SRST in MGCP gateway to provide minimum phone services when WAN link unavailable.

3) You have to use gateway hostname to configure MGCP gateway in CUCM along with correct CUCM group.

Many docs and videos are available in cisco and youtube. Let me know if you stuck while configuring.

-Murali

Aman Soi · ‎11-15-2013

Hi Suthakar,

you can refer the links for MGCP/SIP configs.

http://www.wikihow.com/Add-SIP-Gateway-to-Cisco-CUCM

https://supportforums.cisco.com/docs/DOC-22421

regds,

aman

suthakar sundaralingam · ‎11-19-2013

Hi Guys,

First of all thank your valuable feedback

I have went through with couple of documents and specs, but still i couldn't get thinks working.

Below I have included the voice component of my config, please have a look and do let me know if i miss anything in particular,

!

isdn switch-type basic-net3

network-clock-select 3 BRI0/3/0

network-clock-select 4 BRI0/3/1

interface BRI0/3/0

no ip address

isdn switch-type basic-net3

isdn point-to-point-setup

isdn incoming-voice voice

isdn bind-l3 ccm-manager service mgcp

!

interface BRI0/3/1

no ip address

isdn switch-type basic-net3

isdn point-to-point-setup

isdn incoming-voice voice

isdn bind-l3 ccm-manager service mgcp

ccm-manager fallback-mgcp

ccm-manager mgcp

no ccm-manager fax protocol cisco

ccm-manager music-on-hold

ccm-manager config server x.x.x.x

ccm-manager config

!

mgcp

mgcp call-agent x.x.x.x 2427 service-type mgcp version 0.1

mgcp rtp unreachable timeout 1000 action notify

mgcp modem passthrough voip mode nse

mgcp package-capability rtp-package

mgcp package-capability sst-package

mgcp package-capability pre-package

no mgcp package-capability res-package

no mgcp timer receive-rtcp

mgcp sdp simple

mgcp fax t38 inhibit

mgcp rtp payload-type g726r16 static

mgcp bind control source-interface Port-channel1.xx (internal subinterface)

mgcp bind media source-interface Port-channel1.xx ((internal subinterface)

!!!

Thank you,

Regards,

Suthakar

Aman Soi · ‎11-19-2013

Hi Suthakar,

what is the exact issue are facing?

Is BRI UP?

can u share output of show ccm-manager, show ccm-manager hosts and show isdn status from router?

regds,

aman

suthakar sundaralingam · ‎11-20-2013

Hi Aman,

.

As of now, the bri is not showing the "established state" layer 1 is active and layer 2 is down.

and also in the cucm, the gateway shows as not registered.

I can provide the show command outputs tomorrow morning.

Regards,

Suthakar

Aman Soi · ‎11-20-2013

Hi Suthakar,

Layer 2 should be Mulitple Frame Established then, GW would show registered considering the config is OK.

regds,

aman

suthakar sundaralingam · ‎11-20-2013

Hi Amen,

Acutally the layer 2 status turns to "multiple frame established" when I remove the the following command from the BRI interface configuration

"isdn bind-l3 ccm-manager service mgcp"

interface BRI0/3/0

no ip address

isdn switch-type basic-net3

isdn point-to-point-setup

isdn incoming-voice voice

isdn bind-l3 ccm-manager service mgcp

Otherwise, it stays inactive.

Regards,

Suthakar

Aman Soi · ‎11-20-2013

Hi Suthakar,

Does Gateway shows as Registered in Call Manager after u remove this command?

regds,

aman

suthakar sundaralingam · ‎11-20-2013

No its not, it only brings the layer 2 status into multiple frame established

Aman Soi · ‎11-20-2013

Hi Suthakar,

Share the output of commands along with complete router config , show version .

Also, please share MGCP GW snapshots from CUCM.

regds,

aman

suthakar sundaralingam · ‎11-20-2013

Hi Aman,

I don't have the access to the router now, so will share the details first thing in the morning. Thanks for the assistance.

Suthakar

suthakar sundaralingam · ‎11-21-2013

Hi Aman,

As discussed please find the attached output as follows,

#sh isdn status

Global ISDN Switchtype = basic-net3

%Q.931 is backhauled to CCM MANAGER 0x0003 on DSL 0. Layer 3 output may not apply

ISDN BRI0/0/0 interface

dsl 0, interface ISDN Switchtype = basic-net3

L2 Protocol = Q.921 0x0000 L3 Protocol(s) = CCM MANAGER 0x0003

Layer 1 Status:

DEACTIVATED

Layer 2 Status:

Layer 2 NOT Activated

Layer 3 Status:

0 Active Layer 3 Call(s)

Active dsl 0 CCBs = 0

The Free Channel Mask: 0x80000003

%Q.931 is backhauled to CCM MANAGER 0x0003 on DSL 1. Layer 3 output may not apply

ISDN BRI0/0/1 interface

dsl 1, interface ISDN Switchtype = basic-net3

L2 Protocol = Q.921 0x0000 L3 Protocol(s) = CCM MANAGER 0x0003

Layer 1 Status:

DEACTIVATED

Layer 2 Status:

Layer 2 NOT Activated

Layer 3 Status:

0 Active Layer 3 Call(s)

Active dsl 1 CCBs = 0

The Free Channel Mask: 0x80000003

ISDN BRI0/3/0 interface

dsl 12, interface ISDN Switchtype = basic-net3

Layer 1 Status:

ACTIVE

Layer 2 Status:

Layer 2 NOT Activated

Layer 3 Status:

0 Active Layer 3 Call(s)

Active dsl 12 CCBs = 0

The Free Channel Mask: 0x80000003

%Q.931 is backhauled to CCM MANAGER 0x0003 on DSL 13. Layer 3 output may not apply

ISDN BRI0/3/1 interface

dsl 13, interface ISDN Switchtype = basic-net3

L2 Protocol = Q.921 0x0000 L3 Protocol(s) = CCM MANAGER 0x0003

Layer 1 Status:

ACTIVE

Layer 2 Status:

Layer 2 NOT Activated

Layer 3 Status:

0 Active Layer 3 Call(s)

--More-- Active dsl 13 CCBs = 0

The Free Channel Mask: 0x80000003

Total Allocated ISDN CCBs = 0

#sh ccm-manager

MGCP Domain Name: xxxxx.com

Priority Status Host

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

Primary Registered x.x.x.x

First Backup None

Second Backup None

Current active Call Manager: x.x.x.x

Backhaul/Redundant link port: 2428

Failover Interval: 30 seconds

Keepalive Interval: 15 seconds

Last keepalive sent: 11:10:43 AEDST Nov 21 2013 (elapsed time: 00:00:11)

Last MGCP traffic time: 11:10:43 AEDST Nov 21 2013 (elapsed time: 00:00:11)

Last failover time: None

Last switchback time: None

Switchback mode: Graceful

MGCP Fallback mode: Enabled/OFF

Last MGCP Fallback start time: 05:28:32 AEDST Nov 18 2013

Last MGCP Fallback end time: 11:57:01 AEDST Nov 20 2013

MGCP Download Tones: Disabled

TFTP retry count to shut Ports: 2

Backhaul Link info:

Link Protocol: TCP

Remote Port Number: 2428

Remote IP Address: x.x.x.x

Current Link State: OPEN

Statistics:

Packets recvd: 3

Recv failures: 0

Packets xmitted: 5

Xmit failures: 0

BRI Ports being backhauled:

Slot 0, VIC 0, port 1

Slot 0, VIC 0, port 0

Slot 0, VIC 3, port 1

Configuration Auto-Download Information

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

Current version-id: 1384908973-2cefe363-d1ae-423b-a6ef-a85a0d4216af

Last config-downloaded:00:00:00

Current state: Waiting for commands

Configuration Download statistics:

Download Attempted : 6

Download Successful : 3

Download Failed : 1

TFTP Download Failed : 8428

Configuration Attempted : 3

Configuration Successful : 3

Configuration Failed(Parsing): 0

Configuration Failed(config) : 0

Last config download command: New Registration

FAX mode: disable

Configuration Error History:

Regards,

Suthakar

Aman Soi · ‎11-21-2013

Hi Suthakar,

Have u configured correct Domain name in Call Manager under MGCP GW?

regds,

aman