Tolly Group Validates Gigamon's Leading Performance and Functionality

SILICON VALLEY and MILPITAS, California, November 2, 2010 - Gigamon(TM), the leading global provider of data access solutions, today
announced that the Tolly Group, an independent third-party testing
organization, has completed their evaluation of Gigamon's GigaVUE product
family. The Tolly Group test substantiates Gigamon's assertion of industry
leading performance and functionality.

The Tolly Group evaluated the performance and functionality of the full
line of GigaVUE Data Access Switches and the tests show that the GigaVUE-212,
420, and 2404 devices provide line-rate throughput across all 1Gbps and
10Gbps ports while exhibiting very low latency even at 100% load. Tolly Group
engineers also verified a wide range of features including multiple port
mapping options, protocol and bit-map filtering, thousands of simultaneous
ingress and egress filters per device, and various SNMP and syslog
integration features.

"This test provides buyers with the confidence that Gigamon delivers on
their promise and the declared benefits of the GigaVUE are accurate and
verified," said Kevin Tolly, founder of the Tolly Group. "The GigaVUE Data
Access Switches," Tolly said, "exhibited very low latency across all major
connection scenarios even in a fully utilized chassis."

Gigamon CTO and Co-Founder, Patrick Leong, said, "Gigamon developed this
market because we wanted to resolve a real concern that our customers face
when trying to gain access and visibility to their critical data, anytime,
anywhere on the network. The features of the GigaVUE product line provide a
very scalable resolution and the Tolly Group results verify that customers
will receive the performance and benefits as promised."

For a complete report, visit www.gigamon.com/tollyreport or call
Gigamon's headquarters at +1-408-263-2022.

About Gigamon

Gigamon(TM) delivers intelligent data access solutions to enhance network
monitoring of data centers, service provider and enterprises. The company's
world-renowned GigaVUE(R) aggregates, filters and replicates customized data
streams to all monitoring tools. Gigamon pioneered the technology for
multi-tool environments, addressing the growing new demands for reporting and
analyzing organizational data. Now in its third generation with global
deployments in more than 40 countries, Gigamon's GigaVUE platform is the only
proven, fully-integrated, total solution for all data access needs. For more
information about Gigamon, visit www.gigamon.com.

    Media Contacts:
    Kevin Jablonski
    +1-408-263-2022
    kjablonski@gigamon.com

Kevin Jablonski of Gigamon, +1-408-263-2022, kjablonski at gigamon.com