Version 5.2 Sourcefire 3D System Installation Guide 74
Installing a Sourcefire 3D System Appliance
Using Devices in a Stacked Configuration
Chapter 3
Using Devices in a Stacked Configuration
You can increase the amount of traffic inspected on network segments by
combining the resources of identically configured devices in a stacked
configuration. One device is designated as the primary device and is connected to
the network segments. All other devices are designated secondary devices, and
are used to provide additional resources to the primary device. A Defense Center
creates, edits, and manages the stacked configuration.
The primary device contains sensing interfaces and one set of stacking interfaces
for each secondary device connected to it. You connect the sensing interfaces on
the primary device to the network segments you want to monitor in the same
way as a non-stacked device. You connect the stacking interfaces on the primary
device to the stacking interfaces on the secondary devices using the stacking
cables. Each secondary device is connected directly to the primary device using
the stacking interfaces. If a secondary device contains sensing interfaces, they
are not used.
You can stack devices in the following configurations:
• two 3D8140s
• up to four 3D8250s
• a 3D8260 (a 10G-capable primary device and a secondary device)
• a 3D8270 (a 40G-capable primary device and two secondary devices)
• a 3D8290 (a 40G-capable primary device and three secondary devices)
For the 3D8260 and 3D8270, you can stack additional devices for a total of four
devices in the stack.
One device is designated as the primary device and is displayed on the Defense
Center’s web interface with the primary role. All other devices in the stacked
configuration are secondary and displayed in the web interface with the
secondary role. You use the combined resources as a single entity except when
viewing information from the stacked devices.
Connect the primary device to the network segments you want to analyze in the
same way that you would connect a single 3D8140 or 3D8250. Connect the
secondary devices to the primary device as indicated in the stack cabling diagram.
After the devices are physically connected to the network segments and to each
other, use a Defense Center to establish and manage the stack.
The following sections provide more information on how to connect and manage
stacked devices:
• Connecting the 3D8140 on page 75
• Connecting the 3D8250/8260/8270/8290 on page 75
• Using the 8000 Series Stacking Cable on page 79
• Managing Stacked Devices on page 79
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