Help with configuring VOIP

[temkintegegn]

Hello everyone

I have configured everything, OSPF, PAT, DHCP server.. I am ordered to configure voip on another router called VOIP. IP Phones gets ip address (voice ip address 10.172.32.0 255.255.248.0) successfully  but somehow, they don't get line number and when I type show ephone, it shows me unregistered, there is no registered phone. I uploaded all necessary configuration. Can you help with this?

[Georg Pauwen]

Hello,

do you have a diagram of your topology showing how the devices are connected ? Is this a Packet Tracer project ? If so, post the zipped project (.pkt) file...

[temkintegegn]

Here is my topology. Thanks for the help in advance. I used cisco version 8.0

[Georg Pauwen · Accepted solution]

Hello,

the IP addresses of the Edge and the VoIP router are reversed. Make the changes marked in bold:

EDGE




interface FastEthernet0/0.8
encapsulation dot1Q 8
--> ip address 10.172.32.2 255.255.248.0
ip helper-address 10.172.47.10
ip helper-address 10.172.47.8




VOIP




VOIP#sh run
Building configuration...

Current configuration : 1663 bytes
!
version 15.1
no service timestamps log datetime msec
no service timestamps debug datetime msec
no service password-encryption
!
hostname VOIP
!
ip dhcp excluded-address 10.172.32.1 10.172.32.10
!
ip dhcp pool vlan8
network 10.172.32.0 255.255.248.0
default-router 10.172.32.1
option 150 ip 10.172.32.1
!
no ip cef
no ipv6 cef
!
license udi pid CISCO2811/K9 sn FTX10175ZF1-
!
no ip domain-lookup
!
spanning-tree mode pvst
!
interface FastEthernet0/0
--> ip address 10.172.32.1 255.255.248.0
duplex auto
speed auto
!
interface FastEthernet0/1
no ip address
duplex auto
speed auto
shutdown
!
interface Vlan1
no ip address
shutdown
!
ip classless
--> ip route 0.0.0.0 0.0.0.0 10.172.32.2 
!
ip flow-export version 9
!
telephony-service
max-ephones 40
max-dn 144
ip source-address 10.172.32.1 port 2000
auto assign 1 to 100
!
ephone-dn 1
number 1010
!
ephone-dn 2
number 1020
!
ephone-dn 3
number 1030
!
ephone-dn 4
number 1040
!
ephone-dn 5
number 1050
!
ephone-dn 6
number 1060
!
ephone 1
device-security-mode none
mac-address 0090.21C9.C0B1
type 7960
button 1:1
!
ephone 2
device-security-mode none
mac-address 0007.EC1A.23C7
type 7960
button 1:2
!
ephone 3
device-security-mode none
mac-address 00E0.B0DD.C78C
type 7960
button 1:3
!
ephone 4
device-security-mode none
mac-address 00D0.97B0.57E2
type 7960
button 1:4
!
ephone 5
device-security-mode none
mac-address 00E0.B095.AC39
type 7960
button 1:5
!
ephone 6
device-security-mode none
mac-address 000C.CFBE.C189
type 7960
button 1:6
!
line con 0
!
line aux 0
!
line vty 0 4
login
line vty 5 15
login
!
end