We have recently added Cisco 78XX and Cisco 8831 series phones in our cluster.

Then we observed that TFTP server requests were increased highly. (Previously : >100000 Now : >10000000)

Right now Cisco 7937 phones were completely went unregistered and showing TFTP request time out.

If we manually restarting the TFTP service Cisco 7937 phones getting registered.

Also Cisco 78XX and Cisco 8831 phones were taking a long to get registered.

Is any specific configuration has to be perform for Cisco 78XX and Cisco 8831 phones like SIP Profile etc

Thanks in advance.