A new Cisco 7965 IP phone is installed on a Cisco Unified Communications Manager Express system.When the phone requests the .loads file from the TFTP server, it sees that the versions are different. What does the IP phone do to resolve this issue?
A. The IP phone requests the SEP.cfg file and reboots.
B. The IP phone attempts to obtain the new firmware file image from the TFTP server.
C. The IP phone boot requests the XMLDefault.cnf.xml file and boots up.
D. The IP phone does not boot up and will require manual intervention to factory reset the phone before anew firmware image can be downloaded.
Correct Answer: B
Explanation/Reference:
Explanation: Cisco IP Phone Initialization Process:
1. At initialization, the Cisco IP phone sends a request to the DHCP server to get an IP address, DNSserver address, and TFTP server name or address, if appropriate. Options are set in DHCP server (Option066, Option 150, and so on). It also gets a default gateway address if set in DHCPserver (Option 003).
2. If a DNS name of the TFTP sever is sent by DHCP, then a DNS sever IP address is required to map thename to an IP address. This step is bypassed if the DHCP server sends the IP address of the TFTP server.In this case study, the DHCP server sent the IP address of TFTP because DNS was not configured.
3. If a TFTP server name is not included in the DHCP reply, then the Cisco IP phone uses the default server name.
4. The configuration file (.cnf) file is retrieved from the TFTP server. All .cnf files have the nameSEP.cnf, where “SEP” is an acronym for Selsius Ethernet Phone. If this is the first time thephone is registering with the Cisco CallManager, then a default file, SEPdefault.cnf, is downloaded to theCisco IP phone.
5. All .cnf files include the IP address(es) of the primary and secondary Cisco CallManager(s). The Cisco IPphone uses the IP address to contact the primary Cisco CallManager and register. 6.Once the Cisco IPphone has connected and registered with Cisco CallManager, the Cisco CallManager tells the Cisco IPphone which executable version (called a load ID) to run. If the specified version does not match theexecuting version on the Cisco IP phone, the Cisco IP phone will request the new executable from theTFTP server and reset automatically.
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