Back-up route for telephony service.

[marionfabor]

Hi All,

I want to ask for help on how will I configure the telephony service on my topology that there should be a backup route for my VOIP when one serial line is cut-off/removed. I have set the DHCP, OSPF routing also telephony service with the dial-peers but when I try to cut off one serial line the IP phone won't work. Everyone's suggestions are all welcome.

Thanks

[Georg Pauwen]

Hello,

do you have IP connectivity after the failover ? Is your Call Manager reachable through the backup line ?

[marionfabor]

Yes. I do have IP connectivity and call manager is reachable (pingable) after failover. 

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@Georg Pauwen wrote:

Hello,

do you have IP connectivity after the failover ? Is your Call Manager reachable through the backup line ?

---

[Deepak Kumar]

Hi,

Can you share configuration or PT lab files with us so we can digg in the issue?

[Georg Pauwen]

You also might want to consider running an EEM script that clears the dial peers when the failover occurs. As requested by Deepak, post the running configs of your routers...

[marionfabor]

Hi All,

Here below are the configs related to the telephony service. Thank you.

ip dhcp pool CVOIP
network 192.168.200.0 255.255.254.0
default-router 192.168.200.1
option 150 ip 192.168.200.1

interface FastEthernet1/0.200
encapsulation dot1Q 200
ip address 192.168.200.1 255.255.254.0

router ospf 1
log-adjacency-changes
network 10.10.10.8 0.0.0.3 area 0
network 10.10.10.0 0.0.0.3 area 0
network 192.168.200.0 0.0.1.255 area 0
network 192.168.100.0 0.0.1.255 area 0

dial-peer voice 63000 voip
destination-pattern 6300.
session target ipv4:10.10.10.2
!
dial-peer voice 64000 voip
destination-pattern 6400.
session target ipv4:10.10.10.9
!
telephony-service
max-ephones 10
max-dn 10
ip source-address 192.168.200.1 port 2000
auto assign 4 to 9
auto assign 1 to 9
!
ephone-dn 1
number 62001
!
ephone 1
device-security-mode none
mac-address 000B.BE7E.90B9
type 7960
button 1:1

[Georg Pauwen]

Hello,

post the full running configuration (show run), and indicate which interface is the backup. How did you set up the failover ? Or do you just use OSPF ?

What if you manually clear the dial voice peers after the failover (clear dial-peer voice) ?

[marionfabor]

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Yes. Thats the config that I use above. I only use ospf. How can I setup another failover?  any other recommendations?  Thank you Georg

@Georg Pauwen wrote:

Hello,

post the full running configuration (show run), and indicate which interface is the backup. How did you set up the failover ? Or do you just use OSPF ?

What if you manually clear the dial voice peers after the failover (clear dial-peer voice) ?

---

[Georg Pauwen]

Hello,

OSPF by itself should do the job.

What happens if you issue the 'clear dial-peer voice' exec command, or shut/no shut the access ports where the PCs and the phones are connected to ?