Cisco Ip Phone Download Upding Xmldefault Cnf Xml Repack Instant

The IT Hero's Quest for the Perfect Phone Configuration

Configuration Files for Phones - Unified Communications - Cisco

SEP[MAC].cnf.xml: The phone looks for its unique configuration file. cisco ip phone downloading xmldefault cnf xml repack

<device>
  <deviceType>Cisco 7960</deviceType>
  <loadInformation>SIP70.9-0-2S</loadInformation>
  <callManagerGroup>
    <members>
      <member priority="0">
        <callManager>
          <ports>2000</ports>
          <processNodeName>192.168.1.100</processNodeName>
        </callManager>
      </member>
    </members>
  </callManagerGroup>
  <sipProfile>
    <sipInviteRetry>2</sipInviteRetry>
    <sipRegisterRetry>2</sipRegisterRetry>
    <timerRegisterExpires>3600</timerRegisterExpires>
    <dtmfDbLevel>-3</dtmfDbLevel>
  </sipProfile>
</device>

Ensure the MAC address entered in CUCM matches the physical sticker on the phone. Restart TFTP: Sometimes the TFTP cache hangs. Restarting the service via Cisco Unified Serviceability often clears the "repack" loop. Factory Reset:

Cisco IP phones follow a strict "hunt algorithm" to boot. If it can't find its primary configuration, it requests XMLDefault.cnf.xml. If this file is also missing, or if it points to a firmware version (load) that the phone cannot find or "understand," the phone will restart and try again, creating a loop. Common causes include: The IT Hero's Quest for the Perfect Phone

10. Real-World Case Study

Environment: 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Root cause: TFTP service timed out while reading phone-specific files → served fallback → found default file outdated → repacked.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.

If missing, generate a fresh one via CUCM Administration: Ensure the MAC address entered in CUCM matches

When the TFTP service repacks, it logs messages similar to: