Cisco lost another long-term top executive today. Jayshree Ullal, SVP, Data Center, Switching & Services announced on her blog that she had resigned.  She wrote:

"With mixed feelings and much introspection I have come to my decision to leave Cisco after 15 great and memorable years. My loyalty and affection to Cisco, CEO John Chambers and my teams made this a very difficult and lengthy decision process."

The exit comes as an industry surprise. Ullal was just featured as a keynote speaker at the Interop in April. Ullal was the subject of many Network World articles over the years. She was profiled in the 2005 Power Issue and was profiled by Brad Reese in his 08/20/2007 post: Jayshree Ullal: supreme commander of the Cisco Data Center 3.0 shock attack.

John McCool, one of Ullal's deputies, will take over Ullal's job, Bloomberg reports. Ullal's departure follows the December resignation of Chief Development Officer Charles Giancarlo and the exit of Mike Volpi, who left in February 2007. Stay tuned for more on Ullal's resignation from Cisco Subnet blogger Brad Reese.

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