11-07-2013 02:56 AM - edited 03-16-2019 08:16 PM
Hi all,
i have some problem with my cisco 7940/60 cisco 7940/60 with 8.1(2) firmware would not register to CM 8.6(2)SU3. the problem was the phone is configuring IP and get DHCP server is 255.255.255.255. i tried to upgrade firmware to be 8.1(2)_SR2 and the problem solved. Cisco 7940/60 can register with CM.
Now the problem is reapper. when the 7940/60 phone resetted, the phone is configuring IP and get DHCP server 255.255.255.255 i have checked network and DHCP issue but no problem in there. and when i redowngrade the firmware to 8.1(2) ip phone get their ip address and registered well.
what should i to solve this problem when the problem reappear? is it BUG?
kindly thanks,
11-07-2013 05:32 AM
I've never heard of similar bug, I would focus on looking at your network and try to sniff what is being received on the phone when dhcp is requested, perhaps thee us a rogue one on the network.
Chris
Sent from Cisco Technical Support iPhone App
11-11-2013 01:48 AM
Hi Chris,
Sorry for late reply,
Thanks,
it's happen (unfortunate configuring IP) only on 7940/60. all types except 7940/60 such as 7945 & 7975 working well.
i have gathered the log file from wireshark (as attached) and get error message :
source(TFTP) dest(IP Phone) === Data Packet , Block: 13 (last)
source(IP Phone) dest(TFTP) === Acknowledgment, Block: 13
source(IP Phone) dest(TFTP) === Read Request, File:CTLSEP(MAC).tlv, transfer type: octet
source(TFTP) dest(IP Phone) === Error code, code : file not found, message : file not found
would you like help me to read the logs?
my TFTP address : 146.44.4.182
my IP Phone address : 146.44.29.45
Thanks,
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