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New Member

isdn is unable to backhaul to ccm manager

Hi,

"isdn bind-l3 ccm-manager service mgcp" command is automatically missing from the isdn interface and all the phones are going down. This has been happening intermittently at several locations. When I re-issue the command, it works fine.

Can you please suggest the solution?

Many Thanks.

5 REPLIES
New Member

Re: isdn is unable to backhaul to ccm manager

Hi prasad.manju,

can you please provide the config of your router as well as the sh ver output?

Cheers,

New Member

Re: isdn is unable to backhaul to ccm manager

hostname router

!

boot-start-marker

boot-end-marker

!

logging buffered 4096 debugging

enable secret xxxxx

!

no aaa new-model

!

resource policy

!

clock timezone gmt 0

clock summer-time BST recurring last Sun Mar 2:00 last Sun Oct 2:00

tdm clock bri-auto

mmi polling-interval 60

no mmi auto-configure

no mmi pvc

mmi snmp-timeout 180

voice-card 0

!

!

!

!

!

ip cef

no ip domain lookup

ip sla monitor responder

!

isdn switch-type basic-net3

!

voice rtp send-recv

!

voice service voip

modem passthrough nse codec g711ulaw

!

!

!

!

!

!

!

!

!

!

!

application

global

service alternate default

!

!

!

!

!

!

interface FastEthernet0/0

description IP Address for CCM Gateway

ip address E.F.G.H x.x.x.x

speed 100

full-duplex

!

interface BRI0/0

no ip address

isdn switch-type basic-net3

isdn point-to-point-setup

isdn incoming-voice voice

isdn bind-l3 ccm-manager service mgcp

isdn static-tei 0

!

interface BRI0/1

no ip address

isdn switch-type basic-net3

isdn point-to-point-setup

isdn incoming-voice voice

isdn bind-l3 ccm-manager service mgcp

isdn static-tei 0

!

ip route 0.0.0.0 0.0.0.0 A.B.C.D

no ip http server

!

!

!

control-plane

!

!

voice-port 0/0

compand-type a-law

cptone GB

!

voice-port 0/1

compand-type a-law

cptone GB

!

ccm-manager fallback-mgcp

ccm-manager redundant-host W.X.Y.Z

ccm-manager mgcp

ccm-manager music-on-hold

ccm-manager config server P.Q.R.S P.Q.R.L

ccm-manager config

!

mgcp

mgcp call-agent W.X.Y.Z 2427 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 package-capability rtp-package

no mgcp package-capability res-package

mgcp package-capability sst-package

no mgcp package-capability fxr-package

no mgcp timer receive-rtcp

mgcp sdp simple

mgcp fax t38 inhibit

mgcp rtp payload-type g726r16 static

!

mgcp profile default

!

!

!

!

dial-peer voice 91 pots

destination-pattern 9T

direct-inward-dial

port 0/0

!

dial-peer voice 92 pots

destination-pattern 9T

direct-inward-dial

port 0/1

!

!

call-manager-fallback

max-conferences 4 gain -6

limit-dn 7940 1

limit-dn 7960 2

timeouts interdigit 5

ip source-address E.F.G.H port 2000 strict-match

max-ephones 24

max-dn 24

transfer-pattern 1234....

time-format 24

date-format dd-mm-yy

!

router#sh ver

Cisco IOS Software, C1700 Software (C1700-SV8Y7-M), Version 12.4(5a), RELEASE SO

FTWARE (fc3)

Technical Support: http://www.cisco.com/techsupport

Copyright (c) 1986-2006 by Cisco Systems, Inc.

Compiled Sat 14-Jan-06 04:18 by alnguyen

ROM: System Bootstrap, Version 12.2(7r)XM2, RELEASE SOFTWARE (fc1)

router uptime is 2 weeks, 3 days, 4 hours, 31 minutes

System returned to ROM by power-on

System restarted at 09:17:04 BST Mon May 7 2007

System image file is "flash:c1700-sv8y7-mz.124-5a.bin"

Cisco 1760 (MPC860P) processor (revision 0x600) with 116944K/14128K bytes of mem

ory.

Processor board ID FOC094000GV (2337081928), with hardware revision 0000

MPC860P processor: part number 5, mask 2

1 FastEthernet interface

2 ISDN Basic Rate interfaces

4 Voice NT or TE BRI interfaces

32K bytes of NVRAM.

32768K bytes of processor board System flash (Read/Write)

Configuration register is 0x2102

Re: isdn is unable to backhaul to ccm manager

If MGCP falls back to H323 the config is changed and this command is deleted automatically.

This is expected behaviour if the registration failes - you have "service alternate default" configured.

I had once an issue with this when the WAN link flapped.

-> check if you lose registration with CCM

-> check if router goes from MGCP to H323

-> check WAN connectivity (flaps?)

Possible that you have a SW issue when the gateway goes back from H323 to MGCP...

It's of course also possible that you have an IOS with some personality / bugs.

Cheers,

Martin

New Member

Re: isdn is unable to backhaul to ccm manager

Hello,

To do MGCP BRI Backhaul, you need an IOS T Train, (12.4T), to make it work fine.

Your config has no problem at all.

cheers

jp

New Member

Re: isdn is unable to backhaul to ccm manager

I had a similar issue with my config rewriting on its own for supporting a PRI of less than 24 channels. A temporary workaround that was given to me was once the gateway is up and registered remove the "ccm-manager config" command once you reconfig the idsn backhaul on your BRI. This is something i used because the CallManager was overwriting parts of my config rather than deleting the line entirely. Hope it helps till you find something better.

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