[cisco-voip] Cannot downgrade 7921 from 1.3.4SR1 to 1.1.1

[Ryan Ratliff]

This is covered in the 1.3(3) release notes but apparently not in the 1.3(4) ones.
http://www.cisco.com/en/US/docs/voice_ip_comm/cuipph/7925g/firmware/1_3_3/english/release/notes/792x_133.html#wp235256

"Firmware Downgrade Restrictions

The 1.3(3) firmware introduces a restriction on downgrading to earlier firmware revisions. It is strongly recommended that this firmware is validated for use in a network to ensure full compatibility before implementing this firmware into production. 

Changes in the memory industry, coupled with analysis of some memory corruption, have necessitated a change to some memory drivers and power management algorithms. If it does become necessary to downgrade to an earlier version of firmware, please contact the Cisco Technical Assistance Center in order to learn details of the necessary steps to downgrade."

I'll see about getting it added to the 1.3(4) doc and all future versions.

-Ryan

On Jun 29, 2010, at 5:55 AM, Anthony Kouloglou wrote:

Hi, in my CCME 7.0, i have upgraded all my 7921 running 1.2.1 to 1.3.4SR1 due to roaming problems with 1131).
This did not solve the roaming problems and i wanted to downgrade them to the 1.1.1 firmware which seems not to have these problems.
But, i have done everything correctly (tftp bindings etc) but i still get in my 7921 "firmware upgrade failed"
right after it downloads this file:
079499: Jun 29 12:53:32.029: TFTP: Looking for CTLSEP0021553E8938.tlv
079500: Jun 29 12:53:32.225: TFTP: Looking for WLAN0021553E8938.xml
079501: Jun 29 12:53:32.357: TFTP: Looking for WLANDefault.xml
079502: Jun 29 12:53:32.553: TFTP: Looking for SEP0021553E8938.cnf.xml
079503: Jun 29 12:53:33.753: TFTP: Opened system:/its/vrf1/XMLDefault7921.cnf.xml, fd 8, size 1277 for process 205
079504: Jun 29 12:53:33.769: TFTP: Finished system:/its/vrf1/XMLDefault7921.cnf.xml, time 00:00:00 for process 205
079505: Jun 29 12:53:34.201: TFTP: Looking for Ringlist.xml
079506: Jun 29 12:53:34.205: TFTP: Opened flash:ringtone/RingList.xml, fd 8, size 3334 for process 205
079507: Jun 29 12:53:34.261: TFTP: Finished flash:ringtone/RingList.xml, time 00:00:00 for process 205
079508: Jun 29 12:53:34.393: TFTP: Looking for DistinctiveRingList.xml
079509: Jun 29 12:53:34.397: TFTP: Opened flash:ringtone/DistinctiveRingList.xml, fd 8, size 2823 for process 205
079510: Jun 29 12:53:34.545: TFTP: Finished flash:ringtone/DistinctiveRingList.xml, time 00:00:00 for process 205
079511: Jun 29 12:53:48.173: TFTP: Looking for CP7921G-1.1.1/CP7921G-1.1.1.LOADS
079512: Jun 29 12:53:48.313: TFTP: Looking for CP7921G-1.1.1.LOADS
079513: Jun 29 12:53:48.317: TFTP: Opened flash:/phoneloads/7921/CP7921G-1.1.1.LOADS, fd 8, size 894 for process 205
079514: Jun 29 12:53:48.341: TFTP: Finished flash:/phoneloads/7921/CP7921G-1.1.1.LOADS, time 00:00:00 for process 205
079515: Jun 29 12:53:52.429: %IPPHONE-6-REG_ALARM: Name=SEP0021553E8938 Load=CP7921G-1.3.4SR1 Last=Reset-Reset
079516: Jun 29 12:53:52.637: %IPPHONE-6-REGISTER: ephone-23:SEP0021553E8938 IP:192.168.2.84 Socket:22 DeviceType:Phone has registered



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