02-19-2014 01:33 PM - edited 03-16-2019 09:49 PM
Hi Voice Community,
I recently configured my Voice Gateway (ISR 2921) for ccm-manager MGCP fallback. I was able to register the gateway and the T1 with my call manager (CUCM 9.1). I also have SRST configured and pointed to the gateway's address as the reference. I was able to test it successfully making calls out to the PSTN, etc.
Once I took away the connection to the call manager away, the gateway went into SRST mode as it should. My phones were now referencing the gateway to do the call processings.
My problem is that I performed a "wr mem" while MGCP fallback mode was in "Enable/On".
Once I restored teh connection to the call manager, everything reregistered to the call manager, however I am now getting a fast busy signal when making a call to PSTN via T1/CAS.
I read up that the device runs some type of script in the background once it goes into MGCP fallback mode. Is there anyway to reverse that?
02-19-2014 01:37 PM
Try "no mgcp" wait for the teardown and then type "mgcp"
HTH
Regards,
Yosh
02-19-2014 01:57 PM
unfortunately, that did not help....
I even tried to wipe the configurations and start new with no success...
02-19-2014 02:04 PM
Hi Duy,
Bounce the MGCP stack as Yosh said. Can also post your config for us.
Regards,
Kevin
02-19-2014 02:20 PM
Hi Kevin,
I have tried to boune the MGPC stack with no success after bringing it back up. Please see my configurations below:
----------------------------------------------------
!
card type t1 0 1
!
network-clock-participate wic 1
network-clock-select 1 T1 0/1/0
!
!
voice-card 0
!
!
voice service voip
fax protocol t38 version 0 ls-redundancy 0 hs-redundancy 0 fallback none
h323
modem passthrough nse codec g711ulaw
modem relay latency 100
modem relay sprt v14 receive playback hold-time 25
!
!
application
global
service alternate default
!
!
license udi pid CISCO2921/K9 sn FTX1643AK1P
license accept end user agreement
license boot module c2900 technology-package securityk9
license boot module c2900 technology-package uck9
license boot module c2900 technology-package datak9
hw-module pvdm 0/0
!
!
!
dial-control-mib retain-timer 1000
dial-control-mib max-size 1200
!
!
controller T1 0/1/0
cablelength long 0db
ds0-group 0 timeslots 1-24 type e&m-wink-start
!
controller T1 0/1/1
cablelength long 0db
!
!
interface GigabitEthernet0/1
ip address 10.255.2.75 255.255.255.192
no ip redirects
no ip unreachables
no ip proxy-arp
duplex auto
speed auto
!
!
!
control-plane
!
!
voice-port 0/1/0:0
timeouts interdigit 5
!
ccm-manager fallback-mgcp
ccm-manager mgcp
ccm-manager music-on-hold
ccm-manager config server 10.255.2.101
ccm-manager download-tones
!
mgcp
mgcp call-agent 10.255.2.101 service-type mgcp version 0.1
mgcp dtmf-relay voip codec all mode out-of-band
mgcp rtp unreachable timeout 1000 action notify
mgcp modem passthrough voip mode nse
mgcp modem relay voip sprt v14 transmit hold-time 15
mgcp codec g729r8 packetization-period 60
mgcp package-capability rtp-package
mgcp package-capability sst-package
no mgcp package-capability fxr-package
no mgcp timer receive-rtcp
mgcp sdp simple
!
mgcp profile default
!
sccp local GigabitEthernet0/1
sccp ccm 10.255.2.101 identifier 1 version 7.0
sccp
!
sccp ccm group 1
associate ccm 1 priority 1
!
dial-peer voice 1000 pots
service mgcpapp
port 0/1/0:0
!
dial-peer voice 4 pots
description PSTN
destination-pattern 9..........
port 0/1/0:0
forward-digits all
!
gateway
timer receive-rtp 1200
resource threshold high 96 low 90
!
sip-ua
no transport udp
no transport tcp
!
gatekeeper
shutdown
!
telephony-service
max-ephones 10
max-dn 20
ip source-address 10.255.2.75 port 2000
auto assign 1 to 5 type 7965
auto assign 1 to 5 type 7960
timeouts interdigit 5
system message Operating under SRST
max-conferences 12 gain -6
transfer-system full-consult
!
!
ephone 1
device-security-mode none
!
02-19-2014 02:37 PM
Firstly your missing service mgcp under the controller:
controller T1 0/1/0
cablelength long 0db
ds0-group 0 timeslots 1-24 type e&m-wink-start
Secondly missing the bind command:
mg bind media source interface gi 0/0
mg bind control source interface gi 0/0
check the output of the show controller t1 0/1/0, see if its up.
Rate the post accordingly.
Regards,
Kevin
02-19-2014 02:38 PM
put "ccm-manager config" and then bounce "mgcp"
HTH
Regards,
Yosh
02-19-2014 10:39 PM
Hi Duy,
Are you able to receive incoming calls?
Please share the output of "show isdn status" and also share your full running configuration "show runnning-config".
Also let us know which controller you are using.
Regards,
Nishant Savalia
02-20-2014 01:54 AM
Here is the doc:
Make sure domain name is right on the cucm:
Show ccm-manager
http://www.cisco.com/c/en/us/support/docs/voice/media-gateway-control-protocol-mgcp/43802-mgcp-t1-cas-ccm.html
@ nishant bud and its T1 CAS "show ISDN status" won't be helpful.
Sent from Cisco Technical Support Android App
02-20-2014 03:03 AM
It doesn't seems to be domain name issue unless and until domain name is modified because previously it was registered with CUCM.
Before restoring connection with CUCM you saved the configuration that means at this point CUCM is not handling calls and to make voice gateway to be responsible for managing calls and treat it as H.323, system will remove commands responsible for registering with CUCM and to register it with CME.
So when you saved the configuration it is quite possible that again gateway will not register with CUCM due to lack of commands. You could have check the configuration after restoring connection with CUCM.
What you can do is paste the output of "show ccm-manager" and also let us know the status of MGCP gateway in CUCM (registered / unregistered / unknown).
As you have also tried with reconfiguration at this point it should work, provided gateway is in registered state in CUCM.
If it is registered then share output of "debug vtsp all"
Also let us know the IOS version you are running.
@Kevin:- Thank you for drawing my attention.
Regards,
Nishant Savalia
02-20-2014 07:01 AM
Hi all,
Thank you all for providing input.
within CUCM, the gateway and T1 CAS is "registered".
Another thing that I noticed is that my voice port originally started as voice-port 0/1/0:0. For what ever reason, it is now voice-port 0/1/0:1. (Im not sure if someone logged in an changed that or if it had changed somehow). In any case, I configured the dial-peers to reflect that port change. ie:
dial-peer voice 1000 pots
service mgcpapp
port 0/1/0:1
------------------------------------------------------------------------------------
Below is my output for show CCM-Manager:
-------------------------------------------------
isr-01#show ccm-manager
MGCP Domain Name:isr-01.test.test
Priority Status Host
============================================================
Primary Registered 10.255.2.101
First Backup None
Second Backup None
Current active Call Manager: 10.255.2.101
Backhaul/Redundant link port: 2428
Failover Interval: 30 seconds
Keepalive Interval: 15 seconds
Last keepalive sent: 14:52:50 UTC Feb 20 2014 (elapsed time: 00:00:09)
Last MGCP traffic time: 14:52:50 UTC Feb 20 2014 (elapsed time: 00:00:09)
Last failover time: None
Last switchback time: None
Switchback mode: Graceful
MGCP Fallback mode: Enabled/OFF
Last MGCP Fallback start time: 13:58:00 UTC Feb 20 2014
Last MGCP Fallback end time: 14:00:05 UTC Feb 20 2014
MGCP Download Tones: Enabled
Custom Tone 1 : United States
TFTP retry count to shut Ports: 2
FAX mode: disable
Configuration Error History:
----------------------------------------------------------------------
02-21-2014 07:29 AM
Hi all,
I corrected my issue, but I'm not sure if this is the correct resolution.
I ended up taking away all of the configurations pertaining to voice, and to the controllers. I reconfigured the ISR with my configs including making the change from voice-port 0/1/0:1 to voice-port 0/1/0:0. It seems to have fix it.
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