High-Tech Veteran Michael Ruettgers Joins Gigamon's Board of Directors

Former Chairman & CEO of EMC to help company further expand market leadership position in network monitoring solutions

MILPITAS, California, December 14, 2010 - Gigamon(TM), the leading global provider of Intelligent Data Access
Networking(TM), is pleased to announce the appointment of Michael Ruettgers
to its Board of Directors. The insight, expertise and counsel from Ruettgers
extensive experience managing and scaling technology companies will be
invaluable in further accelerating the next stage of Gigamon's growth.

"We are very excited to have a seasoned veteran like Mike join our
Board," said Ted Ho, co-founder and chief executive officer, Gigamon. "With
cloud computing moving into the mainstream of enterprise computing and
large-scale deployments of 10-Gigabit networks, our business continues to
expand into many new markets worldwide. Mike has experienced this type of
expansion firsthand and managed it with great success. We are looking forward
to working with him."

"I'm delighted to join Gigamon's Board of Directors. Gigamon has a great
story with an impressive history of profitability," said Ruettgers. "There is
a growing enthusiasm for their products and they continue to prevail as a
market leader. Gigamon laid a solid foundation that is similar to that of EMC
in the late 80's. At that time, EMC's market cap was $75M and a decade later
it was $210B, one of the greatest returned in NYSE history. I look forward to
sharing my experiences with Gigamon and furthering their foundation for
successful growth."

Ruettgers joined EMC in 1988 and served as CEO from 1992 until January
2001. Under his leadership, Ruettgers led EMC through a period of
unprecedented growth, with revenues growing from $120 million to nearly $9
billion a decade later. His contributions to EMC continued as he served as
Executive Chairman of EMC's Board through 2005 when he was instrumental in
leading all facets of corporate governance. Ruettgers has been named one of
the "World's Top 25 Executives" by BusinessWeek; one of the "Best Chief
Executive Officers in America" by Worth Magazine; one of the "25 Most
Powerful People in Networking" by Network World.

Gigamon has created a new market around a revolutionary way to access and
monitor all of your network data traffic at a fraction of the cost. Founded
in 2004 and choosing not to raise institutional capital, the company achieved
profitability by the end of 2005. From 2006 to 2010, Gigamon experienced 55%
year over year growth while still being bootstrapped. In 2010, with demand
increasing and growth accelerating, the strategic decision was made to
partner with Highland Capital Partners. Highland invested $22.8 million to
fund global expansion and further expand the company's market leadership
position.

About Gigamon

Gigamon(TM) delivers intelligent data access solutions to enhance network
monitoring of data centers, service provider environments and enterprise
networks, enabling them to securely access and view all their critical
network traffic anytime, anywhere on the network. The company's
world-renowned GigaVUE(R) aggregates, filters and replicates customized data
streams from high speed connections to any and all monitoring tools. Gigamon
pioneered the technology for multi-tool environments, addressing the growing
demands for reporting and analyzing network transactional data. Now in its
third generation, with products installed at hundreds of customers in more
than 40 countries, Gigamon's GigaVUE platform is the only proven,
fully-integrated, scalable solution for all data access needs. For more
information about Gigamon and its award-winning solutions, visit
www.gigamon.com.

Albert Lin of Weber Shandwick, +1-415-262-5969, albert.lin at webershandwick.com, for Gigamon