Route Types Overview - Juniper NETWORK AND SECURITY MANAGER 2010.4 - CONFIGURING SCREENOS DEVICES GUIDE REV 01 Manual

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Route Types Overview

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Documentation
Copyright © 2010, Juniper Networks, Inc.
Virtual router general properties
Access lists
Route Maps
Export and import rules
Routing table entries
Route preferences
For details on configuring dynamic routing protocols (BGP, RIP, OSPF) in the virtual router
and on the interfaces, see "Dynamic Routing Configuration Overview" on page 313. For
details on configuring multicast routing protocols (PIM-SIM, IGMP, IGMP-Proxy) and
multicast route entries, see "Multicast Route Overview" on page 337.
For more detailed explanations about virtual routers and dynamic routing protocols on
security devices, see the Concepts & Examples ScreenOS Reference Guide: Dynamic
Routing.
Route Types Overview on page 295
Virtual Routers Overview on page 296
Virtual Router General Properties Overview on page 297
Route Maps Overview on page 300
You can configure three types of routing on a security device:
Static—Static routes are mappings of IP network addresses to next-hop destinations
that you define on a Layer 3 forwarding device, such as a router. These mappings do
not change unless you alter them. For networks that have few connections to other
networks or where internetwork connections are relatively unchanging, it is usually
more efficient to define static routes than to set up dynamic routing. The device retains
static routes until you explicitly remove them. However, you can override static routes
with dynamic routing information if necessary.
Dynamic—Dynamic routing involves routers exchanging information about the
reachability of networks and subnetworks and adjusting routing tables by analyzing
incoming routing update messages. These messages populate the network, directing
routers to recalculate routes and change their routing tables accordingly.
Multicast—Multicast protocols enable routers to forward traffic from one source to
multiple receivers simultaneously.
All routes are contained within a virtual router.
Configuring Virtual Routers Overview on page 294
Virtual Routers Overview on page 296
Virtual Router General Properties Overview on page 297
Chapter 10: Routing
295