vg204 and srst registration issue

[abd88elhak]

hi
i have 4 cisco voice gateways vg204 on remote site registred on cucm with mgcp and cisco 2921 with srst configured and enabled
the problem : when we lose connectivity with cucm the ip phones are registred but the analog phone connected to VG no
is there any configuration needed to be done for the analog phone to be registred

regards 

[Manish Gogna]

Hi,

Please verify the config as per the following

http://www.cisco.com/c/en/us/td/docs/ios/voice/fxs/configuration/guide/15_1/fxs_15_1_cg_book/fxssrst.html

Manish

[abd88elhak]

Hi

the VG204 are registred with cucm by MGCP but the configuration above for SCCP

is there any conf needed to be done for MGCP  

[Jaime Valencia]

If you're using MGCP then it will not actually register to SRST, that requires SCCP.

What you'll configure is MGCP to fall back to H.323, and then you'll have to configure all the necessary dial-peers to reach out the SRST GW.

[abd88elhak]

hi jaime

as you said i configured my VG registred on cucm wih mgcp with this configuration :

enable secret 5 $1$McLv$mcuMYBWqUwBALAJ/LuhkC/
!
no aaa new-model
!
!
!
!
!
!
!
!
ip cef
no ipv6 cef
!
!
!
!
!
!
!
!
!
!
voice-card 0
!
!
application
global
service alternate Default
!
!
!
!
!
!
!
!
interface FastEthernet0/0
ip address 10.168.80.20 255.255.255.0
duplex auto
speed auto
!
interface FastEthernet0/1
no ip address
shutdown
duplex auto
speed auto
!
ip forward-protocol nd
!
no ip http server
ip route 0.0.0.0 0.0.0.0 10.168.80.100
!
!
!
control-plane
!
!
voice-port 0/0
cptone FR
timeouts ringing infinity
timing digit 50
timing inter-digit 50
!
voice-port 0/1
cptone FR
timeouts ringing infinity
timing digit 50
timing inter-digit 50
!
mgcp
mgcp call-agent 10.16.40.11 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
no mgcp package-capability res-package
no mgcp timer receive-rtcp
mgcp sdp simple
mgcp behavior rsip-range tgcp-only
mgcp behavior comedia-role none
mgcp behavior comedia-check-media-src disable
mgcp behavior comedia-sdp-force disable
!
mgcp profile default
!
!
ccm-manager music-on-hold
!
ccm-manager fallback-mgcp
ccm-manager redundant-host 10.16.40.12 10.16.40.10
ccm-manager mgcp
no ccm-manager fax protocol cisco
ccm-manager config server 10.16.40.11 10.16.40.10 10.16.40.12
ccm-manager config
!
dial-peer voice 9990990 pots
service mgcpapp
port 0/0
!
dial-peer voice 9990991 pots
service mgcpapp
port 0/1
!
dial-peer voice 1 voip
destination-pattern .T
session target ipv4:10.168.80.21
!
dial-peer voice 9990099 pots
service mgcpapp
port 0/0
!
dial-peer voice 9990199 pots
service mgcpapp
port 0/1
!
!
!
line con 0
no modem enable
line aux 0
line vty 0 4
password C!sc0
login
transport input telnet

and also i have configured a dial peers voice voip on srst gateway 2921 to route calls to ip adress of VG204

but when WAN failover and the cucm was inaccessible all ip phone are registred normally on SRST gateway but analog phone connected to FXS port no

and when i call from ip phone to analog phone i get busy tone and also from analog phone to ip phone

please help me is there any other configuration missed either on srst gateway or VG204

regards 

[voip7372]

I don't know why you need it to be MGCP, but if the reason is for the convenience of being able to configure the analog phone devices in CUCM rather than having to do more in the VG204XM gateway, then you can use the same config I pasted in here previously.  Trust me, it works fine.  I can configure the devices in CUCM for each of the 4 ports and it works fine with SRST.  In my example, the VG204XM is configured as a VG204 gateway in CUCM with the protocol as SCCP.  I see all 4 ports associated with that gateway in CUCM and I can click each one to add an analog device and line.  

The 'service stcapp' entry for dial-peer/port is the key to making it show up in CUCM as something you can configure there :-)

Believe me...there's no need for MGCP in this case.  I have several VG204XM's setup just like this and it works fine (SRST, etc).

(Edited to correct a mistake)

[abd88elhak]

Hi

Thank you for all your responses about my problem

So i should delete mgcp configuration on vg204 and reconfigure it as sccp on cucm because there is no h323 when i try to add the vg

[voip7372]

Sorry, I misspoke.  I wasn't logged in on our network at the time and I couldn't check the exact type for the VG204 on our server (I forgot it was indeed NOT a H323 gateway).  Anyway, yes you would configure it on CUCM with the gateway type as VG204 and the protocol as SCCP.  You can use that config I pasted in previously for the config on the VG204XM itself.

[Jaime Valencia]

I guess you still don't understand this, that's how it will work, the ONLY way in which it will register to SRST, is if you change it to SCCP. With MGCP as you have it, it will fallback as turning itself into an H.323 GW, which then will need the dial-peers to place any call.

If you actually want it to register to the SRST GW, then your only option, is to use it as SCCP.

[voip7372]

Here's the exact config I use for our VG204XM units.  In this example, 172.17.11.97 is the local router that has SRST support for the VG204XM.  

interface FastEthernet0/0
ip address 172.17.11.98 255.255.255.224
speed auto
duplex auto
no shut
exit

hostname CISCO-VG204-1
ip route 0.0.0.0 0.0.0.0 172.17.11.97

enable secret (enter our 2nd level password here)

line con 0
logging synchronous
exec-timeout 60

line vty 0 4
login
password (enter our first level password here)
logging synchronous
transport input telnet
exec-timeout 60

service password-enc
no ip domain lookup

sccp local fastethernet 0/0

voice service voip
fax protocol t38 nse force fallback pass-through g711ulaw
exit

ccm-manager sccp local fastethernet 0/0
ccm-manager sccp

stcapp ccm-group 1
stcapp

voice-port 0/0
timeouts initial 60
timeouts interdigit 60
timeouts ringing infinity
voice-port 0/1
timeouts initial 60
timeouts interdigit 60
timeouts ringing infinity
voice-port 0/2
timeouts initial 60
timeouts interdigit 60
timeouts ringing infinity
voice-port 0/3
timeouts initial 60
timeouts interdigit 60
timeouts ringing infinity
exit

ccm-manager sccp local fastethernet 0/0
ccm-manager sccp
sccp local fastethernet 0/0
sccp

sccp ccm 192.168.1.1 identifier 1 version 7.0+
sccp ccm 192.168.1.2 identifier 2 version 7.0+
sccp ccm 192.168.1.3 identifier 3 version 7.0+
sccp ccm 172.17.11.97 identifier 4 version 7.0+

sccp ccm group 1
associate ccm 1 priority 1
associate ccm 2 priority 2
associate ccm 3 priority 3
associate ccm 4 priority 4
switchback method graceful
bind interface fa0/0

dial-peer voice 1 pots
service stcapp
port 0/0
dial-peer voice 2 pots
service stcapp
port 0/1
dial-peer voice 3 pots
service stcapp
port 0/2
dial-peer voice 4 pots
service stcapp
port 0/3