Cisco Systems 7500 Series manual Dual CyBus Backplane in the Cisco 7507-MX

Chapter 1 Cisco 7500 Series Product Overview

Cisco 7507-MX Overview

Figure 1-9					Dual CyBus Backplane in the Cisco 7507-MX
			Interface		RSP	Interface
		processor		slots 2		processor
	slots 0 and 1			and 3		slots 4–6

SLOT 0 SLOT 1

CyBus 0

SLOT 2

SLOT 3

SLOT 4 SLOT 5 SLOT 6

CyBus 1

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Note The Cisco 7507-MX backplane includes connectors for time-division multiplexing (TDM)-compatible hardware. These connectors allow you to connect the Cisco 7507-MX to future TDM hardware as it becomes available. The Cisco 7507-MX also includes Cisco’s turbo arbiter. The turbo arbiter, when used in conjunction with other future hardware, significantly increases system bandwidth. When not used with this future hardware, the turbo arbiter operates in standard CyBus mode.

An RSP2, RSP4/4+, or RSP8 in either slot 2 or slot 3 controls both CyBus 0 and CyBus 1. The dual CyBus backplane in the Cisco 7507-MX has an aggregate bandwidth of 2.134 Gbps. The two CyBuses are independent of one another. Interface processors connected to one CyBus are unaffected by the traffic generated by the interface processors connected to the other.

The backplane slots are keyed so that the processor modules can be installed only in the slots designated for them. Keys on the backplane fit into two key guides on each module. Although the RSP uses unique keys, all five interface processor slots use the same key, so you can install an interface processor in any interface processor slot, but not in the RSP slot.

	Cisco 7500 Series Installation and Configuration Guide
OL-5008-03 B0		1-13