Juniper Networks M160 manual Routing Protocol Process, IPv4 Routing Protocols

M160 Internet Router Hardware Guide

VPNs on page 48

Interface Process on page 49

Chassis Process on page 49

SNMP and MIB II Processes on page 49

Management Process on page 49

Routing Engine Kernel on page 49

Routing Protocol Process

The JUNOS software routing protocol process controls the routing protocols that run on the router. The routing protocol process starts all configured routing protocols and handles all routing messages. It consolidates the routing information learned from all routing protocols into common routing tables. From this routing information, the routing protocol process determines the active routes to network destinations and installs these routes into the Routing Engine’s forwarding table. Finally, the routing protocol process implements the routing policies you specify, which determine how routing information is transferred between the routing protocols and the routing table.

This section discusses the following topics:

IPv4 Routing Protocols on page 44

IPv6 Routing Protocols on page 46

Routing and Forwarding Tables on page 47

Routing Policy on page 47

For complete information about routing concepts, see the JUNOS

Internet software configuration guides.

IPv4 Routing Protocols

The JUNOS Internet software implements full IP routing functionality, providing support for IP version 4 (IPv4). The routing protocols are fully interoperable with existing IP routing protocols and provide the scale and control necessary for the Internet core. The software provides support for the following routing and traffic engineering protocols:

Unicast routing protocols

BGP—Border Gateway Protocol, version 4, is an Exterior Gateway Protocol (EGP) that guarantees loop-free exchange of routing information between routing domains (also called autonomous systems). BGP, in conjunction

44 Routing Engine Software Components