c. The integrated ASIC performs a second route lookup for each packet and decides
how to forward it.
4. The integrated ASIC notifies the outbound networking interface.
5. The integrated ASIC reassembles data cells stored in shared memory into data packets
as they are ready for transmission and passes them to the outbound networking
interface.
6. The outbound networking interface transmits the data packets.
Figure 2: Packet Forwarding Engine Components and Data Flow
Related
Documentation
M7i Compact Forwarding Engine Board (CFEB) and Enhanced Compact Forwarding
Engine Board (CFEB-E) Description on page 63
•
• M7i Router Description on page 3
Routing Engine Architecture
The Routing Engine runs the Junos OS, which Juniper Networks has developed and
optimized to handle large numbers of network interfaces and routes. The software
consists of a set of system processes running in protected memory modules on top of
an independent operating system. The Junos kernel supports Junos system processes,
which handle system management processes, routing protocols, and control functions
(see Figure 3 on page 7).
The Routing Engine has a dedicated 100-Mbps internal connection to the Packet
Forwarding Engine.
Copyright © 2019, Juniper Networks, Inc.6
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