Problem with IP Telephony Setup with Packet Tracer

Port Assignments:

CME: fa0/0 - 192.168.2.1/24

CORE SW:
fa0/2(connected to CME) - 192.168.2.2/24
fa0/3(PC1_MIS) - DHCP obtain IP
fa0/4(IP_PHONE MIS / PC2_MIS) - IP Phone can't obtain IP & DN Number BUT PC2_MIS was able to obtain DHCP IP.

the rest of the toplogy below both host and IP Phone where able to obtain IP.

all host can ping EDGE ROUTER, all IP PHONE can ping CME DEVICE via OSPF

what's the problem with my configuration why my IP PHONE directly connected to the CORE can't obtain IP from CME?

other Suggestion which best fit for my topology? im planning to deploy 14 IP phones and there will be growth in few month's time.

not yet configured:
- port security
- queuing
- priority

CCME Config:
ip dhcp excluded-address 192.168.100.1
!
ip dhcp pool VOICE
network 192.168.100.0 255.255.255.0
default-router 192.168.100.1
option 150 ip 192.168.2.1
!
interface FastEthernet0/0
ip address 192.168.2.1 255.255.255.0
ip nat inside
duplex full
speed 100
!
router ospf 100
log-adjacency-changes
network 192.168.2.0 0.0.0.255 area 0
network 192.168.100.0 0.0.0.255 area 0
!
ip classless
!
telephony-service
max-ephones 4
max-dn 4
ip source-address 192.168.2.1 port 2000
auto assign 1 to 2
auto assign 2 to 3
auto assign 3 to 4
auto assign 4 to 5
!
ephone-dn 1
number 101
!
ephone-dn 3
number 103
!
ephone-dn 4
number 104
!
ephone-dn 2
number 102
!
ephone 1
device-security-mode none
mac-address 0060.47E6.0317
type 7960
button 1:1
!
ephone 2
device-security-mode none
mac-address 0005.5EAE.5D54
type 7960
button 1:3
!
ephone 3
device-security-mode none
mac-address 0090.0C4E.8498
type 7960
button 1:4
!
line con 0
exec-timeout 0 0
logging synchronous
line vty 0 4
exec-timeout 0 0
password cisco
logging synchronous
login
!
end

CORE_SWITCH:

ip dhcp excluded-address 192.168.10.1
ip dhcp excluded-address 192.168.20.1
ip dhcp excluded-address 192.168.30.1
ip dhcp excluded-address 192.168.40.1
!
ip dhcp pool ADMIN
network 192.168.10.0 255.255.255.0
default-router 192.168.10.1
ip dhcp pool INC_ROOM1
network 192.168.30.0 255.255.255.0
default-router 192.168.30.1
ip dhcp pool MIS_ROOM
network 192.168.20.0 255.255.255.0
default-router 192.168.20.1
ip dhcp pool INC_ROOM2
network 192.168.40.0 255.255.255.0
default-router 192.168.40.1
ip routing
!
interface FastEthernet0/1
no switchport
ip address 150.150.150.2 255.255.255.0
duplex full
speed 100
!
interface FastEthernet0/2
no switchport
ip address 192.168.2.2 255.255.255.0
duplex full
speed 100
!
interface FastEthernet0/3
switchport access vlan 20
switchport mode access
switchport voice vlan 100
!
interface FastEthernet0/4
switchport access vlan 20
switchport mode access
switchport voice vlan 100
!
interface FastEthernet0/10
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface FastEthernet0/11
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface FastEthernet0/12
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface Vlan1
ip address 10.1.1.1 255.255.255.0
!
interface Vlan10
ip address 192.168.10.1 255.255.255.0
!
interface Vlan20
ip address 192.168.20.1 255.255.255.0
!
interface Vlan30
ip address 192.168.30.1 255.255.255.0
!
interface Vlan40
ip address 192.168.40.1 255.255.255.0
!
interface Vlan100
ip address 192.168.100.1 255.255.255.0
ip helper-address 192.168.2.1
!
router ospf 100
log-adjacency-changes
network 192.168.2.0 0.0.0.255 area 0
network 192.168.100.0 0.0.0.255 area 0
!
router ospf 200
log-adjacency-changes
network 150.150.150.0 0.0.0.255 area 0
network 192.168.10.0 0.0.0.255 area 0
network 192.168.20.0 0.0.0.255 area 0
network 192.168.30.0 0.0.0.255 area 0
network 192.168.40.0 0.0.0.255 area 0
!
ip classless
ip route 0.0.0.0 0.0.0.0 150.150.150.1 
!
banner motd ^C
UNAUTHORIZED ACCESS PROHIBITED
^C
!
line con 0
exec-timeout 0 0
logging synchronous
line vty 0 4
exec-timeout 0 0
password cisco
logging synchronous
login
!
end

EDGE_ROUTER:

interface FastEthernet0/0
ip address 150.150.150.1 255.255.255.0
duplex full
speed 100
!
router ospf 200
log-adjacency-changes
network 150.150.150.0 0.0.0.255 area 0
network 192.168.10.0 0.0.0.255 area 0
network 192.168.20.0 0.0.0.255 area 0
network 192.168.30.0 0.0.0.255 area 0
network 192.168.40.0 0.0.0.255 area 0
!
line con 0
exec-timeout 0 0
logging synchronous
line vty 0 4
exec-timeout 0 0
password cisco
logging synchronous
login
!
end

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Comments

peanutnoggin

You need to add the ip helper-address interface command so your phone knows how to get to the DHCP server. Check out Cisco's site or other documentation regarding a helper address! HTH.

-Peanut

cygee26

peanutnoggin wrote: »

You need to add the ip helper-address interface command so your phone knows how to get to the DHCP server. Check out Cisco's site or other documentation regarding a helper address! HTH.

-Peanut

I already added the IP Helper-address to VLAN 100 with that my IP Phones on ACCESS SWITCH where able to get their designated IP NUMBERS as well as their respective DN Numbers.

interface Vlan40
ip address 192.168.40.1 255.255.255.0
!
interface Vlan100
ip address 192.168.100.1 255.255.255.0
ip helper-address 192.168.2.1
!
router ospf 100
log-adjacency-changes
network 192.168.2.0 0.0.0.255 area 0
network 192.168.100.0 0.0.0.255 area 0

chmorin

You have a benifit of using packet tracer. Watch the DHCP requests (in simulation mode), where do they get sent to and stopped at?

cygee26

chmorin wrote: »

You have a benifit of using packet tracer. Watch the DHCP requests (in simulation mode), where do they get sent to and stopped at?

thank you for the reply...

i selected edit filter to enable dhcp only. but what should the pdu settings? no dhcp on the choices of application.

if i select "Others" my source port is 2000 but i dont have a destination port.

the IP phone connected on the core switch keeps on sending a dhcp request. the switch is broadcasting to all ports except towards the CME. the pdu ends on the last broadcast towards the host connected to the ip phone.

chmorin

Why do you have a static route?

ip route 0.0.0.0 0.0.0.0 150.150.150.1

Can I see a show IP Route on the core?

And one of the L2 switches configurations?

hermeszdata

chmorin wrote: »
Why do you have a static route?
ip route 0.0.0.0 0.0.0.0 150.150.150.1
Can I see a show IP Route on the core?

And one of the L2 switches configurations?

That and why all the network statements under ospf that do not exist on the devices?

Multiple ospf ASs? What is the reasoning?

Just wondering.

cygee26

chmorin wrote: »
Why do you have a static route?
ip route 0.0.0.0 0.0.0.0 150.150.150.1
Can I see a show IP Route on the core?

And one of the L2 switches configurations?

About the Static Route: i forgot to removed it from my config after i implemented OSPF.

CORE

CORE_SWITCH#show ip route
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
       E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
       i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area
       * - candidate default, U - per-user static route, o - ODR
       P - periodic downloaded static route

Gateway of last resort is 150.150.150.1 to network 0.0.0.0

     10.0.0.0/24 is subnetted, 1 subnets
C       10.1.1.0 is directly connected, Vlan1
     150.150.0.0/24 is subnetted, 1 subnets
C       150.150.150.0 is directly connected, FastEthernet0/1
C    192.168.2.0/24 is directly connected, FastEthernet0/2
C    192.168.10.0/24 is directly connected, Vlan10
C    192.168.20.0/24 is directly connected, Vlan20
C    192.168.30.0/24 is directly connected, Vlan30
C    192.168.40.0/24 is directly connected, Vlan40
C    192.168.100.0/24 is directly connected, Vlan100
S*   0.0.0.0/0 [1/0] via 150.150.150.1

ADMIN L2 SWITCH

Switch#show run
Building configuration...

Current configuration : 2813 bytes
!
version 12.2
no service timestamps log datetime msec
no service timestamps debug datetime msec
no service password-encryption
!
hostname Switch
!
!
!
interface FastEthernet0/1
 switchport access vlan 10
 switchport mode access
 switchport voice vlan 100
!
interface FastEthernet0/2
 switchport access vlan 10
 switchport mode access
 switchport voice vlan 100
!
interface FastEthernet0/3
 switchport access vlan 10
 switchport mode access
 switchport voice vlan 100
!
interface FastEthernet0/4
 switchport access vlan 10
 switchport mode access
 switchport voice vlan 100
!
interface FastEthernet0/5
 switchport access vlan 10
 switchport mode access
 switchport voice vlan 100
!
interface FastEthernet0/6
 switchport access vlan 10
 switchport mode access
 switchport voice vlan 100
!
interface FastEthernet0/7
 switchport access vlan 10
 switchport mode access
 switchport voice vlan 100
!
interface FastEthernet0/8
 switchport access vlan 10
 switchport mode access
 switchport voice vlan 100
!
interface FastEthernet0/9
 switchport access vlan 10
 switchport mode access
 switchport voice vlan 100
!
interface FastEthernet0/10
 switchport access vlan 10
 switchport mode access
 switchport voice vlan 100
!
interface FastEthernet0/11
 switchport access vlan 10
 switchport mode access
 switchport voice vlan 100
!
interface FastEthernet0/12
 switchport access vlan 10
 switchport mode access
 switchport voice vlan 100
!
interface FastEthernet0/13
 switchport access vlan 10
 switchport mode access
 switchport voice vlan 100
!
interface FastEthernet0/14
 switchport access vlan 10
 switchport mode access
 switchport voice vlan 100
!
interface FastEthernet0/15
 switchport access vlan 10
 switchport mode access
 switchport voice vlan 100
!
interface FastEthernet0/16
 switchport access vlan 10
 switchport mode access
 switchport voice vlan 100
!
interface FastEthernet0/17
 switchport access vlan 10
 switchport mode access
 switchport voice vlan 100
!
interface FastEthernet0/18
 switchport access vlan 10
 switchport mode access
 switchport voice vlan 100
!
interface FastEthernet0/19
 switchport access vlan 10
 switchport mode access
 switchport voice vlan 100
!
interface FastEthernet0/20
 switchport access vlan 10
 switchport mode access
 switchport voice vlan 100
!
interface FastEthernet0/21
 switchport access vlan 10
 switchport mode access
 switchport voice vlan 100
!
interface FastEthernet0/22
 switchport access vlan 10
 switchport mode access
 switchport voice vlan 100
!
interface FastEthernet0/23
 switchport access vlan 10
 switchport mode access
 switchport voice vlan 100
!
interface FastEthernet0/24
!
interface GigabitEthernet1/1
!
interface GigabitEthernet1/2
!
interface Vlan1
 ip address 10.1.1.2 255.255.255.0
!
!
line con 0
!
line vty 0 4
 login
line vty 5 15
 login
!
!
end

That and why all the network statements under ospf that do not exist on the devices?

Multiple ospf ASs? What is the reasoning?

Just wondering.

i was trying to isolate VOICE_VLAN Network from DATA_VLAN networks

cygee26

CCME(config-router)#
00:55:55: %OSPF-5-ADJCHG: Process 100, Nbr 192.168.100.1 on FastEthernet0/0 from LOADING to FULL, Loading Done

CCME(config-router)#
%IPPHONE-6-REGISTER: ephone-1 IP:192.168.100.4 Socket:2 DeviceType:Phone has registered.

%IPPHONE-6-REGISTER: ephone-2 IP:192.168.100.5 Socket:2 DeviceType:Phone has registered.

%IPPHONE-6-REGISTER: ephone-3 IP:192.168.100.3 Socket:2 DeviceType:Phone has registered.

when OSPF negotiated on CME only 3 phones where registered.

re configured my OSPF by isolating to different area assignment, now IP phones in L2 Switch can ping edge router which it should. which i see the reason why. i used 192.168.0.0 0.0.255.255 which covers my DATA_VLAN and VOICE_VLAN

joseto

Hello, please yuo can send me your Packet Tracer file to my mail, I'm studing to CCNA voice certification and your topology is very interesting to study. Thank you for you help and colaboration.

k_kafley0

Can you try the following:

CORE(config)#interface FastEthernet0/4
CORE(config-if)#switchport access vlan 20
CORE(config-if)#switchport mode trunk
CORE(config-if)#switchport voice vlan 100

k kafle