Exhibit II to Schedule 13G Joint Filing Agreement

Exhibit II

to

Schedule 13G

Joint Filing Agreement

The undersigned persons agree and consent to the joint filing on their behalf of this Schedule 13G dated June 26, 2012 in connection with their beneficial ownership of PLX Technology, Inc. Each of Xxxxxxxx Spectrum Focus (Master) Fund and Columbia Management Investment Advisers, LLC authorizes Ameriprise Financial, Inc. to execute the Schedule 13G to which this Exhibit is attached and make any necessary amendments thereto.

Ameriprise Financial, Inc.
By:		/s/ Xxxx X. Xxxxx
		Xxxx X. Xxxxx
		Vice President – Fund Administration – Financial Reporting
Columbia Management Investment Advisers, LLC
By:		/s/ Xxx Xxxxxxx
		Xxx Xxxxxxx
		Chief Operating Officer
Xxxxxxxx Spectrum Focus (Master) Fund
By:		/s/ Xxxx X. Xxxxxx
		Xxxx X. Xxxxxx
		Authorized Person