01-11-2009 01:47 PM - edited 03-15-2019 03:26 PM
I'm having issues with my CCUM 6 where my phones will not obtian an IP address, they just sit there with the mesage 'Configuring IP', its the first time I have used version 6, the last time I configured CCM from the ground up was at version 4.1 which used Windows 2000 DHCP, does anybody know why my phones would just sit here at this stage, my settings on configurations are below.
Thanks for you time and hope you can help me out here, if you need to see more settings or configurations then please let me know.
Here are my DHCP Server Settings
Host Server 192.168.3.248
Primary TFTP Server IP Address(Option 150) 192.168.3.248
Secondary TFTP Server IP Address(Option 150)
Bootstrap Server IP Address 192.168.3.248
Domain Name ccum
Here is my DHCP Subnet Settings
DHCP Server 192.168.3.248
Subnet IP Address 10.50.50.0
Primary Start IP Address 10.50.50.1
Primary End IP Address 10.50.50.50
Primary Router IP Address 10.50.50.250 which my VLAN 2 IP Address
Domain Name ccum
Primary TFTP Server IP Address(Option 150) 192.168.3.248
Bootstrap Server IP Address 192.168.3.248
Switch Settings
interface FastEthernet0/6
description ***IP Phone***
switchport trunk encapsulation dot1q
switchport mode trunk
switchport voice vlan 2
spanning-tree portfast
interface FastEthernet0/43
description ***CCUM 6***
switchport trunk encapsulation dot1q
switchport mode access
switchport voice vlan 2
spanning-tree portfast
interface Vlan1
description *** Data Vlan ***
ip address 192.168.3.250 255.255.255.0
interface Vlan2
description *** Voice Vlan ***
ip address 10.50.50.250 255.255.255.0
Solved! Go to Solution.
01-13-2009 10:05 AM
Hi Martyn,
Since the switch is configured for 'voice vlan 2' your PC will not get the voice vlan. This uses CDP which your PC does not use.
I would go through the phone settings and make sure DHCP is on, that you're connecting the phones with a straight through wire, and that they don't have any statically set IP settings.
You can also hook up a SPAN session and see what's going across the wire. See if the phones are sending out DHCP requests, which can also be done with the dhcp debugs. I just like watching the wire myself :)
You can also try changing some of the phone ports to something like this:
int fa0/1
switch mode access
switch access vlan 2
switch voice vlan 2
Or, go in and statically configure the IP addresses and see if you can ping it from the switch.
This may be a problem that has nothing to do with DHCP.
hth,
nick
01-11-2009 03:17 PM
Hi Martyn,
I am no Network expert by any means, but it looks like the Voice Vlan is missing the IP Helper address (that points to your DHCP Server). There are some good tips in this doc;
http://www.cisco.com/en/US/tech/tk648/tk361/technologies_tech_note09186a0080114aee.shtml
Hope this helps!
Rob
01-11-2009 04:05 PM
Thanks for your reply Rob, added the line but still no Joy
Cheers
01-11-2009 04:16 PM
If you would like you can simplify some of this configuration by adding the DHCP server locally on the switch.
Configuration would be something like this:
ip dhcp excluded address
ip dhcp pool phones
network 10.50.233.0 255.255.255.0
default-router 10.50.233.1
option 150 ip 172.18.110.80
domain cisco.com
hth,
nick
01-12-2009 02:13 AM
Thanks Nick, I will give that a try but I would like to know how to do it on the server if poss.
Cheers
01-12-2009 11:32 AM
If I am not mistaken for helper addresses to function properly you need to enable the dhcp service.
01-12-2009 03:29 PM
You know, a draw back to the config you are proposing is that if your dhcp server fails, phones will not register. If you config the dhcp server on the switch, you bypass this issue.
01-12-2009 05:33 PM
OK I have configured the DHCP server on the Switch: -
ip dhcp pool Voice
network 10.50.50.0 255.255.255.0
default-router 192.168.3.254
option 150 ip 192.168.3.248
dns-server 194.168.4.100 194.168.8.100
lease 14
Disabled DHCP on Callmanager but still I get no IP adddress.
Are my switch settings correct for my call manager?
interface FastEthernet0/43
description ***CCUM 6***
switchport trunk encapsulation dot1q
switchport mode trunk
switchport voice vlan 2
spanning-tree portfast
Thanks for your time
01-12-2009 07:05 PM
The default router has to be in the same subnet as the phones. In this case you would make it the switch VLAN 2 address.
hth,
nick
01-13-2009 08:36 AM
First of all I would like to say thanks for your support here its very much appreciated.
I made the changes as suggested but still not joy, no IP's for my phones, no leases not offers and nothing in my Debug DHCP detail
DHCP server: ANY (255.255.255.255)
Leases: 0
Offers: 0 Requests: 0 Acks: 0 Naks: 0
Declines: 0 Releases: 0 Bad: 0
My switch setting are now looking like: -
ip dhcp pool Voice
network 10.50.50.0 255.255.255.0
default-router 10.50.50.250
option 150 ip 192.168.3.248
dns-server 194.168.4.100 194.168.8.100
lease 14
interface FastEthernet0/43
description ***CCUM 6***
switchport trunk encapsulation dot1q
switchport mode access
switchport voice vlan 2
spanning-tree portfast
interface FastEthernet0/48
description Martyn Desk Phone 7970
switchport trunk encapsulation dot1q
switchport mode trunk
switchport voice vlan 2
spanning-tree portfast
Thanks for your continued support
Martyn
01-13-2009 08:47 AM
Update:, I have just plugged my laptop into the Switch to see if I get a 10. IP address, I get an IP address but it come from my Linksys Router on my 192 network.
01-13-2009 10:05 AM
Hi Martyn,
Since the switch is configured for 'voice vlan 2' your PC will not get the voice vlan. This uses CDP which your PC does not use.
I would go through the phone settings and make sure DHCP is on, that you're connecting the phones with a straight through wire, and that they don't have any statically set IP settings.
You can also hook up a SPAN session and see what's going across the wire. See if the phones are sending out DHCP requests, which can also be done with the dhcp debugs. I just like watching the wire myself :)
You can also try changing some of the phone ports to something like this:
int fa0/1
switch mode access
switch access vlan 2
switch voice vlan 2
Or, go in and statically configure the IP addresses and see if you can ping it from the switch.
This may be a problem that has nothing to do with DHCP.
hth,
nick
01-13-2009 04:01 PM
OK getting places now, I'm now getting TFTP timeouts, just going to check my settings.
Nick thanks for your help so far
Martyn
01-13-2009 04:37 PM
OK all sorted now, I had made a few errors along the way which caused me much grief.
here is my final configuration: -
interface FastEthernet0/43
description ***CCUM 6***
switchport trunk encapsulation dot1q
switchport mode access
spanning-tree portfast
Which you suggested Nick But my biggest mistake was inter VLAN routing
IP ROUTING
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