The Cisco 7000 Series Router
The Cisco 7000 series router represented the next step in the evolution of the AGS and the Cbus architecture. Other than the mechanical structure and outward appearance, the 7000 wasn't drastically different from its predecessor, the AGS+. The biggest architectural difference was the elimination of the Multibus and Multibus interface cards—only Cbus interface cards were supported on the 7000.
Some of the changes were mostly superficial. On the 7000, the AGS+ processor card was replaced by the Route Processor (RP) card and the Cbus Controller was replaced by the 7000's Switch Processor (SP) card, but the RP and SP retained the same CPUs as their AGS+ counterparts. Although there was no Multibus, per se, on the 7000, ...
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