Cisco Ip Phone Downloading Xmldefault Cnf — Xml Repack
By [Your Name] | Network Engineering Lead
If you manage a Cisco Unified Communications Manager (CUCM) environment, you have likely stared at the screen of a Cisco IP Phone (7940, 7960, 7906, or 7912) watching it cycle through its boot process. One of the most common—and often misunderstood—messages displayed is: "Downloading xmldefault.cnf.xml"
For many administrators, this message signals a broken phone. For others, it appears fleetingly as a normal step. But when you add the word "repack" into the troubleshooting mix—specifically, hunting for a "repack" of the xmldefault.cnf.xml file—you enter a niche area of legacy VoIP restoration.
This article will dissect exactly what xmldefault.cnf.xml is, why your phone is stuck downloading it, and what the community-driven term "repack" means for reviving old Cisco IP phones.
The XMLDefault.cnf.xml file is a critical default configuration file used by Cisco IP phones during their registration and firmware update processes. It acts as a fallback when a phone does not have a device-specific configuration file. Purpose and Role in Registration
When a Cisco IP phone boots, it follows a specific sequence to find its configuration:
Device-Specific Search: The phone first attempts to download SEP from the TFTP server.
Fallback to Default: If the specific file is not found, the phone requests XMLDefault.cnf.xml.
Key Instructions: This default file provides the phone with essential information, including: cisco ip phone downloading xmldefault cnf xml repack
The IP address and Port for registration (e.g., SCCP or SIP messages).
The Firmware Load ID, which specifies the required software version the phone should run. Downloading the XMLDefault File
You can retrieve the XMLDefault.cnf.xml file from a Cisco Unified Communications Manager (CUCM) TFTP server for analysis or modification. Using Windows CLI: Enable the TFTP Client in Windows Features.
Open the command prompt and run:tftp -i . Using Third-Party Tools:
Tools like Tftpd32 or Tftpd64 can be used by selecting the "TFTP Client" tab, entering the CUCM host IP, and requesting the file. "Repacking" or Modifying the File
"Repacking" in this context typically refers to modifying the XML file to point a phone to new firmware when a full CUCM environment is unavailable.
Firmware Association: Open the downloaded XMLDefault.cnf.xml with a text editor. Locate the tag corresponding to your phone model (e.g., .loads file).
Deployment: Place the modified XML file and the unzipped firmware binaries (downloaded as a .zip from Cisco Support) into the root directory of your local TFTP server. By [Your Name] | Network Engineering Lead If
Execution: Configure the IP phone to use your local computer's IP as its "Alternate TFTP" server and restart the phone to trigger the download. Important Considerations 8861 software upgrading error - Cisco Community
Cisco IP phones use the XMLDefault.cnf.xml file as a fallback configuration during the boot process, primarily for auto-registration or when a specific device configuration file (e.g., SEP) is missing from the TFTP server. Boot & Download Sequence
When a Cisco IP phone boots, it follows a specific hierarchy to obtain its configuration:
Request Specific Config: The phone first requests SEP from the TFTP server.
Fallback to Default: if the specific file is not found (Error code "file not found"), the phone requests XMLDefault.cnf.xml.
Firmware Check: The phone reads the
Download Firmware: If the versions differ, the phone downloads the specified firmware load from the TFTP server. How to Download and "Repack" (Edit)
"Repacking" in this context typically refers to manually editing the file to force a firmware upgrade without a full Cisco Unified Communications Manager (CUCM) environment. The XMLDefault
Downloading the Original: You can pull the existing file from a CUCM TFTP server using a Windows TFTP Client or tools like TFTPD64: tftp -i Use code with caution. Copied to clipboard Editing (Repacking): Open the file in a text editor (e.g., Notepad++). Locate the entry for your phone model (e.g.,
Change the
Deployment: Place the modified XML and the unzipped firmware binaries into the root directory of your third-party TFTP server. Common Troubleshooting
Firmware Version Limitations: Newer phones (firmware 9.x and later) may bypass XMLDefault.cnf.xml if specific load information is already cached or hardcoded.
File Size Limits: Older 2nd generation phones (7940/7960) may fail to download if the XML file exceeds 8KB.
Update Cisco IP Phone Firmware through Third-Party TFTP Server
The ability to download, decrypt, repack, and serve XMLDefault.cnf.xml provides powerful customization and research capabilities. However, it requires careful handling of encryption parameters and poses operational risks. Enterprises should enforce signed configuration files and monitor TFTP logs for anomalies.
