The GSR is available in three configurations:
12008— 8-slot chassis with a 40-Gbps switch fabric.
12012— 12-slot chassis with a 60-Gbps switch fabric.
12016— 16-slot chassis with a 80-Gbps switch fabric that can be upgraded to 320 Gbps.
Figure 7-1 shows a high level overview of the Cisco 12000.
The following lists the most important components of the Cisco 12000 architecture:
Maintenance Bus (MBUS)
All the Cisco router platforms discussed in this book so far are based on a shared bus architecture. The following items limit bus-based ...