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192 Extreme Networks Consolidated Hardware Guide
BlackDiamond 6800 Series Switch Overview
Eight I/O module slots, labeled slots 1 through 8
Two MSM64i slots, labeled slots A and B
Two power supply bays (accessed from the front of the unit)
One fan tray (accessed from the rear of the unit)
One electromagnetic discharge (ESD) wrist strap connector
BlackDiamond 6804 Switch
The BlackDiamond 6804 switch consists of the following components:
One 6-slot chassis with backplane
Four I/O module slots, labeled slots 1 through 4
Two MSM64i slots, labeled slots A and B
Two power supply bays (accessed from the front of the unit)
One fan tray (accessed from the front of the unit)
One electromagnetic discharge (ESD) wrist strap connector
BlackDiamond Power Supplies
Three types of power supplies are available for the BlackDiamond switches:
220 VAC
110 VAC
-48 VDC
All installed power supplies must be of the same type. You cannot mix 110 VAC, 220 VAC, and -48 VDC
power supplies in a single chassis.
All BlackDiamond power supplies are hot-swappable. They are also load-sharing. If one power supply
fails in a BlackDiamond 6800 series chassis, the remaining power supplies will provide sufficient power
to operate a chassis that has all slots populated with modules.
Switch Connectivity and the Backplane
Switch connectivity is an important aspect of the BlackDiamond 6800 series switch. The MSM64i
module is the internal switch fabric for data being sent between I/O modules. No configuration
information is stored on the I/O modules; all configuration information is stored on the MSM64i
module(s). Each MSM64i has two CPUs for protocol processing and network management. For full
redundancy, you can install up to four MSM64i modules in the BlackDiamond 6816 switch and up to
two MSM64i modules in the BlackDiamond 6808 and BlackDiamond 6804 switches.
The BlackDiamond 6800 series switch has a 100% passive backplane which means the backplane does
not contain any active components that can fail. A passive backplane is important because it increases
the reliability of the switch. The I/O modules treat the backplane as one logical connection and use the
same load sharing (trunking) algorithm as the front facing ports to distribute the switch traffic. There
are multiple Gigabit links from the I/O modules to the MSM64i modules, and most I/O modules have
eight full duplex Gigabit Ethernet links to the backplane that provide 16 bps full duplex bandwidth to
the backplane. If one of the backplane Gigabit Ethernet links fails, ExtremeWare reroutes the switch
traffic from the failed backplane Gigabit Ethernet link to another available backplane link. By moving to
another available backplane link, switch connectivity is not disrupted.
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