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Help for the use of DHCP and TFTP in a CUCM cluster

Hi,

I have a few questions on the use of DHCP and TFTP in my CUCM cluster.

I have a CUCM BE6000 with one publisher and one subscriber for 100 ip-phone.

 

- My first question is for using the internal DHCP of my CUCM cluster:

I have activate the internal DHCP in my publisher with this ip range for the ip-phone: X.X.X.1 to X.X.X.100.

But for backup the DHCP server (DHCP in my Publisher), i have also activate the internal DHCP in my subscriber with another ip range for the ip-phone: X.X.X.101 to X.X.X.200.

Actually, with there 2 DHCP server i don't have any problème.

I have also test the backup, it's OK (i have shutdown the publisher and after restard the publisher i have shutdown the subscriber).

This use is it correct ?

Because i have read in a cisco's documentation this: Only one DHCP server can be configured per CUCM cluster; no backup configuration is possible.

 

- My second question is for using the TFTP service of my Publisher and my Subscriter:

For using MOH with the media ressource of my Publisher and Subscriber, i must activate the TFTP in the publisher and the subscriber for upload the MOH file inthe two server.

If I let the TFTP service enabled on both servers, i can use the subscriber server as backup of the publisher for the TFTP service?

The ip-phone files configuration are duplicated publisher to subscriber?

If i desactivate the TFTP service of my subscriber and if my publisher crash, if a reboot a ip-phone, it can't download his configuration file, but i can boot, start and registered to the subscriber?

 

 

Thank you very much for your help.


 

 

 

1 Accepted Solution

Accepted Solutions

Gregory Brunn
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Question 1: Yes I have done this.

Question 2: Yes, but you would need to configure you DHCP server to hand out the additional option 150 address.

Question 3: Yes the .xml files for phones will be.  The default firmware will be as well. If you upgraded firmware from the default you will need to upload it on that server as well.

Question 4 :If the TFTP server does not respond, the IP phone falls back to the last
used configuration stored in NVRAM. 

View solution in original post

2 Replies 2

Gregory Brunn
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Question 1: Yes I have done this.

Question 2: Yes, but you would need to configure you DHCP server to hand out the additional option 150 address.

Question 3: Yes the .xml files for phones will be.  The default firmware will be as well. If you upgraded firmware from the default you will need to upload it on that server as well.

Question 4 :If the TFTP server does not respond, the IP phone falls back to the last
used configuration stored in NVRAM. 

Ok, thanks very much Gregory.