Cisco 8851's lag issues

[John Smith1]

Phone system is CUCM. We're having issues where almost every Cisco 8851 at a location (approximately 30 phones) becomes laggy over time. If a phone is on for around a month, the phone will start experiencing a long delay on offhook dialing, picking up calls, putting calls on hold, going into the settings, etc. Over time, the phone will eventually reboot by itself. Reboot temporarily fixes the issue. 

I've opened up two TAC cases on this over the last 6 months, and both have gone no where (gather logs , update firmware, rinse and repeat). Both cases have found a memory leak inside the logs. 

We've done these things so far:

• Updated firmware to sip88xx.14-2-1-0101-26
• Enabled Simplied UI

None of these solutions have worked. Has anyone here experienced Cisco 8851 that become laggy over time, and have you resolved this issue?

[Jonathan Schulenberg]

A TAC case for six months and a confirmed memory leak but you still don’t have a defect ID?! Have you escalated the case to: 1) that engineer’s manager; 2) the TAC Duty Manager; and, 3) you Cisco account team? Make some noise because that is egregiously bad.

[Maren Mahoney]

Do you have other 8851s at other locations that are not experiencing this issue? Essentially, is it just the one location? 

(And I agree with @Jonathan Schulenberg that a confirmed memory leak with no resolution or escalation is super bad.)

Maren

[awall@crowleyfleck.com]

Exact same symptoms for us. Only happens on the 8851 phones. Any update on this?