Cisco Ip Phone ((full)) Downloading Xmldefault Cnf Xml Repack

If missing, generate a fresh one via :

If you are running a standalone lab or using an alternate TFTP engine, you must ensure your XMLDefault.cnf.xml is perfectly structured. Follow these steps to build, edit, and deploy a clean repack. Step 1: Use a Standard XML Template

Ensure the entry does not include the .loads extension, just the version number (e.g., use 88xx.12-5-1-12 , not 88xx.12-5-1-12.loads in some older firmware versions, but modern ones often require the full name. Check the README file in the firmware download).

Open your XMLDefault.cnf.xml file and locate the tag corresponding to your hardware model. Insert the exact filename of your target firmware image the .bin or .cop extension.

When a phone hangs on "Downloading XMLDefault.cnf.xml," it means the phone successfully requested this fallback file but the TFTP transaction timed out, failed, or the file contains directives (like a firmware mismatch) that cause the phone to reset and retry indefinitely. Root Causes of the Boot Loop cisco ip phone downloading xmldefault cnf xml repack

Log into your . Navigate to Trace & Log Central > Collect Files . Select Cisco TFTP logs.

When a Cisco IP phone boots up, it requests a specific configuration file named after its MAC address (e.g., SEP001122334455.cnf.xml ).

CUCM 12.5, 200 phones (mostly 8845). Symptom: Every morning at 8 AM, 30 phones reboot and fail to register, logs show "repack XMLDefault.cnf.xml". Investigation: TFTP server CPU was 100% due to a backup job running simultaneously. Root cause: TFTP service timed out while reading phone-specific files → served fallback → found default file outdated → repacked. Resolution: Rescheduled backup, increased TFTP cache timeout, and synced all configs. The repack messages disappeared.

By mastering the hierarchy, common troubleshooting scenarios, and manual "repack" techniques for extracting and editing these XML files, you gain full control over your Cisco IP phone deployment. Whether you are recovering a bricked device, converting a phone to SIP, or integrating with Asterisk, the ability to download, modify, and repack XMLDefault.cnf.xml is a foundational skill for any voice network administrator. If missing, generate a fresh one via :

If you are migrating phones between clusters, the phone may be rejecting the new XMLDefault

Press Settings > Network Configuration > Locked (Unlock via **# ) > ITL File > Delete .

Save as XMLDefault.cnf.xml (case sensitive).

XMLDefault.cnf.xml file, retrieved via TFTP or browser from a Cisco CallManager, dictates firmware versions and server addresses for IP phones. Customizing or "repacking" this file involves editing Check the README file in the firmware download)

: This is critical. It must match the exact filename (excluding the file extension like .loads or .bin ) of the firmware currently residing on your TFTP server directory. Step 3: Verify XML Structure and Integrity

GET /XMLDefault.cnf.xml HTTP/1.1 If-Modified-Since: ...

Plug the cable back in while pressing and holding the (pound) key.