CHAPTER 3
System Architecture Overview
•
System Architecture Overview on page 27
•
M7i and M10i Packet Forwarding Engine Architecture on page 28
•
Routing Engine Architecture on page 29
System Architecture Overview
The router architecture consists of two major components:
•
Packet Forwarding Engine—Performs Layer 2 and Layer 3 packet switching, route
lookups, and packet forwarding.
•
Routing Engine—Provides Layer 3 routing services and network management.
The Packet Forwarding Engine and the Routing Engine perform independently but
communicate constantly through a 100-Mbps internal link. This arrangement provides
streamlined forwarding and routing control and the ability to run Internet-scale networks
at high speeds. Figure 18 on page 27 illustrates the relationship between the Packet
Forwarding Engine and the Routing Engine.
Figure 18: System Architecture
Related
Documentation
M7i Chassis Description on page 6
•
•
M7i Midplane Description on page 7
•
M7i Power System Description on page 21
27
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