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DHCP Configuration

Submitted by warpsys on Fri, 07/11/2008 - 07:35

We have a Windows 2003 server that acts as a DHCP Server giving out IP addresses to the computers on the network. The UC520 is also acting as a DHCP server and is set to give out IP addresses to both the computers and the phones. Both the Windows DHCP server and the UC520 are in the same IP range and we cannot have two DHCP servers on the network.
We need to keep the Windows server as the DHCP for the computers.
Is it possible to configure it like this?

I can remove the data DHCP from the UC520 using the following command

no ip dhcp pool data

However, if I do that, the phones cannot see the 192.168.10.x address (the service URL address is http://192.168.10.55/scripts/menu.xml) and the computers are unable to log onto the Cisco Unit Express or Call Manager as they cannot see the 10.1.x.x range

Please advise how we can resolve these problems?

Here is the details from our network

Our network has a DHCP server scope as follows

IP Range 192.168.10.1 - 192.168.10.254
Excluded Range 192.168.10.1 - 192.168.10.10
Default Router 192.168.10.250
DNS Server 192.168.10.50

The UC520 is also acting as a DHCP server with the following ranges

Data

IP Range 192.168.10.1 - 192.168.10.254
Excluded Range 192.168.10.1 - 192.168.10.10
Default Router 192.168.10.1
DNS Server 63.203.35.55

Phones

IP Range 10.1.1.1 - 10.1.1.254
Excluded Range 10.1.1.1 - 10.1.1.10
Default Router 10.1.1.1

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#1Submitted by jamesharries on Fri, 09/12/2008 - 05:01.

Windows SBS and UC500

Hi Everyone

Are you saying above that you need to use, in my case SBS to give the pc's an IP address? I was under the impression that when installing a UC500 into a network that you switch the DHCP server off in the SBS and let the UC500 issue all the IP Addresses to both the pc's and phones? 10.x.x.x for data 192.168.10.x for voice with the default VLAN's on the UC500.

Can someone confirm if this is correct.

Many Thanks
James
#2Submitted by rbrown on Sat, 09/13/2008 - 18:48.

You only need to disable the data dhcp

You only need to disable the data dhcp on the UC500.If you want to add it to your local lan network See my example below:

Follow this example

Procedure:

Obtain3 IP addresses outside your DHCP scope data subnet.

192.168.10.10 UC520 Vlan 1
192.168.10.11 CUE
1492.168.10.12 UC520 Switch
192.168.10.254 Default Gateway
Configuration:

If you have a switch? Change the IP address first by entering the current ip address in your URL there is no password. You can find this in the cli by typing #show cdp n d
!
!
Ip dhcp relay information trust-all
No ip dhcp excluded-address 192.168.10.1 192.168.10.10
!
No ip dhcp pool data
!
interface Vlan1
ip address 192.168.10.10 255.255.255.0
no ip access-group 102 in
!
interface Integrated-Service-Engine0/0
ip unnumbered Vlan1
service-module ip address 192.168.10.11 255.255.255.0
service-module ip default-gateway 192.168.10.10
!
exit
!
!
No ip route 10.1.10.1 255.255.255.255 Integrated-Service-Engine0/0
ip route 192.168.10.11 255.255.255.255 Integrated-Service-Engine0/0
!
Ip route 0.0.0.0 0.0.0.0 192.168.10.254
!
dial-peer voice 2000 voip
description ** cue voicemail pilot number **
session target ipv4:192.168.10.11
!
!
dial-peer voice 2001 voip
description ** cue AA pilot number **
session target ipv4: 192.168.10.11
!
!
dial-peer voice 2003 voip
description ** cue auto attendant PSTN number **
session target ipv4:192.168.10.11
!
telephone-service
url service http://192.168.10.11/voiceview/common/login.do
url service http://192.168.10.11/voiceview/authentication/authenticate.do
create cnf
!
!
exit
!
!
copy run start

Next, start a session into the CUE

From global mode enter (UC520#service-module Integrated-Service-Engine0/0 session or #service in 0/0 sess ) Enter
Enter
CUE>en Enter
Password Enter !!!There is no password just enter!!!
CUE# conf t Enter

Configuration

No ntp server 10.1.10.2 prefer
ntp server 192.168.10.10 prefer
!
ccn subsystem sip
gateway address 192.168.10.10
exit
copy run start
exit
exit
!
Your are now back into UC520

Reload the CUE module

service-module Integrated-Service-Engine0/0 session reload

The CUE can take up to 10 minutes to reload so when you see

CUE> it is done

Connect a cable to a spare switch port on the UC520 and you are good to go!!!!!
#3Submitted by isworks on Fri, 09/12/2008 - 14:48.

You can...

You certainly can use the UC for dhcp. We have chosen not to and have kept everything on the SBS server.

While it has posed it's problems, I prefer it that way.
#4Submitted by isworks on Thu, 08/07/2008 - 18:41.

We turned off all DHCP on

We turned off all DHCP on the UC520 and only use it as a phone switch and to route between vlans.

To do this you need to give each vlan a helper address.
That would be the IP of your DHCP server.

Then the UC520 becomes your default gateway and you give a "last route" to your firewall unless you are using the UC in that manner. We are not, we have a PIX 506e.

Here's how it works:
+++++++++++++++++++++++++++++++++++++++++++++++++++
interface Vlan1
ip address 10.9.101.2 255.255.255.0
ip helper-address 10.9.101.22
ip nat inside
ip virtual-reassembly
!
interface Vlan2
ip address 10.10.10.1 255.255.255.0
ip helper-address 10.9.101.22
!
interface Vlan100
ip address 10.1.1.1 255.255.255.0
ip helper-address 10.9.101.22
!
ip route 0.0.0.0 0.0.0.0 10.9.101.1
ip route 10.1.10.1 255.255.255.255 Integrated-Service-Engine0/0
ip route 10.9.100.0 255.255.255.0 10.9.101.1

interface Loopback0
ip address 10.1.10.2 255.255.255.252
ip nat inside
ip virtual-reassembly

interface Integrated-Service-Engine0/0
description cue is initialized with default IMAP group
ip unnumbered Loopback0
ip helper-address 10.9.101.22
ip nat inside
ip virtual-reassembly
service-module ip address 10.1.10.1 255.255.255.252
service-module ip default-gateway 10.1.10.2

ip routing
+++++++++++++++++++++++++++++++++++++++++++++++++++

Does that make sense or help?
#5Submitted by lalleyj on Sun, 11/02/2008 - 15:58.

Turned off DHCP

What is the purpose of VLAN 2 with 10.10.10.1?
#6Submitted by rbrown on Sat, 07/12/2008 - 17:42.

Cisco IP Communicator

TFTP server ip address for Cisco IP Communicator is 192.168.1.1
#7Submitted by rbrown on Sat, 07/12/2008 - 14:32.

Sorry my mistake!!

I gave you the wrong ip address for CUE. Here is the detail

Next, start a session to the CUE
From global mode enter (UC520#service-module Integrated-Service-Engine0/0 session or #service in 0/0 se ) Enter
Enter
CUE>en Enter
Password Enter !!!There is no password!!!
CUE# conf t Enter
Configuration
No ntp server 192.168.1.2 prefer
ntp server 192.168.10.1 prefer
!
ccn subsystem sip
gateway address 192.168.10.1
end
copy run start
exit
exit
!
Your are now back to UC520
Reload the CUE module
service-module Integrated-Service-Engine0/0 session reload
The CUE can take up to 10 minutes to reload so when you see
CUE> it is done
Connect a cable to a spare switch port on the UC520 and you are good to go!!!!!

To log on to UC500 from your PC, Type 192.168.1.1/ccme.html for user phone and 192.168.1.2 administrator. If after you make the changes and you log in with 192.168.1.2 and you get Lost Contact, Logging details are,

Hostname 192.168.1.1
Username cisco
Password cisco
Repeat cisco

This is the link for factory-default

http://uc500.com/going-back-factory-default
#8Submitted by rbrown on Fri, 07/11/2008 - 11:08.

Fellow this example

Procedure:

Obtain3 IP addresses outside your DHCP scope data subnet.

192.168.10.1 UC520 Vlan 1
192.168.10.2 CUE
1492.168.10.3 UC520 Switch
192.168.10.250 Default Gateway

Configuration:

If you have a switch? Change the ip address first by entering the current ip address in URL there is no password. You can find this in cli by typing #show cdp n d
!
!
Ip dhcp relay information trust-all
No ipdhcp excluded-address 192.168.10.1 192.168.10.10
!
No ipdhcp pool data
!
interface Vlan1
ip address 192.168.10.1 255.255.255.0
no ip access-group 102 in
!
interface Integrated-Service-Engine0/0
ip unnumbered Vlan1
service-module ip address 192.168.10.2 255.255.255.0
service-module ip default-gateway 192.168.10.1
!
exit
!
!
No ip route 10.1.10.1 255.255.255.255 Integrated-Service-Engine0/0
ip route 192.168.10.2 255.255.255.255 Integrated-Service-Engine0/0
!
Ip route 0.0.0.0 0.0.0.0 192.168.10.250
!
dial-peer voice 2000 voip
description ** cue voicemail pilot number **
session target ipv4:192.168.10.2
!
!
dial-peer voice 2001 voip
description ** cue AA pilot number **
session target ipv4: 192.168.10.2
!
!
dial-peer voice 2003 voip
description ** cue auto attendant PSTN number **
session target ipv4:192.168.10.2
!
telephone-service
url service http://192.168.10.2/voiceview/common/login.do
url service http://192.168.10.2/voiceview/authentication/authenticate.do
create cnf
!
!
exit
!
!
copy run start

Next, start a session to the CUE

From global mode enter (UC520#service-module Integrated-Service-Engine0/0 session or #service in 0/0 se ) Enter
Enter
CUE>en Enter
Password Enter !!!There is no password!!!
CUE# conf t Enter

Configuration

No ntp server 10.1.10.2 prefer
ntp server 192.168.10.2 prefer
!
ccn subsystem sip
gateway address 192.168.10.2
end
copy run start
exit
exit
!
Your are now back to UC520

Reload the CUE module

service-module Integrated-Service-Engine0/0 session reload

The CUE can take up to 10 minutes to reload so when you see

CUE> it is done

Connect a cable to a spare switch port on the UC520 and you are good to go!!!!!
#9Submitted by warpsys on Fri, 07/11/2008 - 12:47.

Thanks for the quick and

Thanks for the quick and full reply

I have made the changes above (I think)

Not sure how to test fully, but the Services URL does not connect on the phone, it simply times out. The URL is http://192.168.10.55/scripts/menu.xml which is a web hosting server on the internal network

Also, not sure if I ameant to be able to but I cannot access the 10.1.x.x pages on the PC's (though I can access 192.168.10.2)

Could you advise how I can troubleshoot please?

PS - I ran the show cdp n d command and it comes up with.....

UC520#show cdp n d
-------------------------
Device ID: SEP00215555B52D
Entry address(es):
IP address: 10.1.1.11
Platform: Cisco IP Phone 7941, Capabilities: Host
Interface: FastEthernet0/1/3, Port ID (outgoing port): Port 1
Holdtime : 138 sec

Version :
SCCP41.8-2-2SR2S

advertisement version: 2
Duplex: full
Power drawn: 12.900 Watts

-------------------------
Device ID: SEP001E7ABB7900
Entry address(es):
IP address: 10.1.1.12
Platform: CP-7921G, Capabilities: Host
Interface: Dot11Radio0/5/0.100, Port ID (outgoing port): Port 0
Holdtime : 164 sec
Version :
SCCP41.8-2-2SR2S

advertisement version: 2
Duplex: full
Power drawn: 12.900 Watts

-------------------------
Device ID: SEP001E7ABB7900
Entry address(es):
IP address: 10.1.1.12
Platform: CP-7921G, Capabilities: Host
Interface: Dot11Radio0/5/0.100, Port ID (outgoing port): Port 0
Holdtime : 164 sec

Version :
CP7921G-1.0.4.LOADS

advertisement version: 2.

I havent done anything about the 192.168.10.3 IP address - should I?

Many thanks

Paul
#10Submitted by warpsys on Fri, 07/11/2008 - 14:10.

Also, just realised that the

Also, just realised that the Cisco IP Communicator wont work as it cannot contact 10.1.1.1.

Think there is an answer to this - something about the TFTP server?

Any help would be great

Many thanks

Paul
#11Submitted by hotrot on Thu, 08/07/2008 - 17:44.

The way you setup your

The way you setup your network there's no comunication between the 2 subnets.

PC's --> If you want the PC's able to access the 10.1.10.1 IP of the Cisco router you have to alter the routing table of the PC's. Or add a additional default router to the DHCP options on your win2k3 server.

Phone's --> did you try to ping form the cli on the UC500 to the IP adres of the XML server?? What does the status page of the phone say?

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