Routing And Forwarding Tables; Figure 36: Control Packet Handling For Routing And Forwarding Table; Updates - Juniper TX MATRIX PLUS Hardware Manual

Copyright © 2010, Juniper Networks, Inc.
BGP—Border Gateway Protocol, version 4.
ICMP—Internet Control Message Protocol.
IS-IS—Intermediate System–to–Intermediate System.
OSPF—Open Shortest Path First, version 3 (OSPFv3).
RIP—Routing Information Protocol, version 2.

Routing and Forwarding Tables

The primary function of the Junos routing protocol process is maintaining routing tables
and using the information in them to determine active routes to network destinations.
The process copies information about the active routes into the TX Matrix Plus Routing
Engine's forwarding table, which is synchronized with each T1600 router by the kernel
synchronization process that runs on each T1600 router's Routing Engine (see Figure 36
on page 83). The Junos kernel running on each T1600 router's Routing Engine copies its
forwarding table to all Packet Forwarding Engines in the router. The Junos kernel running
on each T1600 Routing Engine copies its forwarding table to all Packet Forwarding
Engines in the router.

Figure 36: Control Packet Handling for Routing and Forwarding Table

Updates

Routing protocol
Forwarding table
Routing Engine
updates
Kernel synchronization
T1600
Routers
Forwarding table
Packets
Packet Forwarding
in
By default, the routing protocol process maintains the following routing tables and uses
the information in each table to determine active routes to network destinations:
Chapter 4: Junos OS in a Routing Matrix Overview
process
TX Matrix Plus
Routing protocol
packets from network
process
T1600 Router
Routing Engine
T1600 Router
Engines
Packets
out
83