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Routing Policy Configuration Guide
This guide provides an overview of both the routing policy concepts and routing policy framework for devices running Junos OS. A routing policy is a mechanism in Junos OS that allows you to modify the routing policy framework to suit your needs. The routing policy framework is a collection of Junos OS policies that allows you to control flows of routing information and packets. This page contains information about configuring routing policies.
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- Overview
Introduction to Policy Framework Router Flows Affected by Policies
Routing Policies Configuration Overview
Introduction to Routing Policy Understanding Routing Policies
Importing and Exporting Routes
Default Routing Policies and Actions
Routing Policy Named Match Conditions
Protocol-Based Match Conditions
Routing Protocol Support for Import and Export Policies
Applying a Routing Policy to Routing Protocols
Applying Export Policies to the Forwarding Table
How a Routing Policy Is Evaluated
How a Routing Policy Chain Is Evaluated
How a Routing Policy Expression Is Evaluated
Introduction to Extended Match Conditions Configuration Understanding BGP Communities and Extended Communities as Routing Policy Match Conditions
How BGP Communities and Extended Communities Are Evaluated in Routing Policy Match Conditions
Introduction to Extended Actions Configuration Introduction to Traffic Sampling, Forwarding, and Monitoring Overview Introduction to Traffic Forwarding and Monitoring Configuration - Configuration
Routing Policy Configuration Statements Minimum Routing Policy Configuration
Routing Policy Configuration Configuring Match Conditions in Routing Policy Terms
Configuring Actions in Routing Policy Terms
Applying Routing Policies and Policy Chains to Routing Protocols
Applying Policy Expressions to Routes Exported from Routing Tables
Applying Routing Policies to the Forwarding Table
Configuring Dynamic Routing Policies
Forwarding Packets to the Discard Interface
Example: Creating a Routing Policy
Example: Creating a Routing Policy Term
Example: Rejecting Known Invalid Routes
Examples: Configuring Static Routes
Example: Defining a Routing Policy from BGP to IS-IS
Example: Using Routing Policy to Set a Preference
Example: Importing and Exporting Access and Access-Internal Routes in a Routing Policy
Example: Exporting Routes to IS-IS
Example: Applying Export and Import Policies to BGP Peer Groups
Example: Defining a Routing Policy Based on the Number of BGP Communities
Example: Applying a Prefix to Routes Learned from a Peer
Example: Redistributing BGP Routes with a Specific Community Tag into IS-IS
Example: Redistributing OSPF Routes into BGP
Example: Exporting Direct Routes Into IS-IS
Example: Exporting Internal IS-IS Level 1 Routes to Level 2
Example: Exporting IS-IS Level 2 Routes to Level 1
Example: Assigning Different Forwarding Next-Hop LSPs to Different Destination Prefixes
Example: Grouping Destination Prefixes
Example: Grouping Source Prefixes
Example: Grouping Source and Destination Prefixes into a Forwarding Class
Example: Accepting Routes with Specific Destination Prefixes
Example: Accepting Routes from BGP with a Specific Destination Prefix
Example: Using Routing Policy in an ISP Network
Example: Overriding the Default BGP Routing Policy on Packet Transport Switches
Extended Match Conditions Configuration Configuring AS Path Regular Expressions to Use as Routing Policy Match Conditions
Defining BGP Communities and Extended Communities for Use in Routing Policy Match Conditions
Including BGP Communities and Extended Communities in Routing Policy Match Conditions
Using Routing Policies to Prevent Advertisement of BGP Communities to Neighbors
Examples: Configuring BGP Communities as Routing Policy Match Conditions
Configuring Prefix Lists for Use in Routing Policy Match Conditions
Example: Configuring a Prefix List
Configuring Route Lists for Use in Routing Policy Match Conditions
Configuring Subroutines in Routing Policy Match Conditions
Configuring Routing Policy Match Conditions Based on Routing Table Entries
Extended Actions Configuration Prepending AS Numbers to BGP AS Paths
Example: Configuring a Routing Policy to Prepend the AS Path
Adding AS Numbers to BGP AS Paths
Using Routing Policies to Damp BGP Route Flapping
Configuring Per-Packet Load Balancing
Configuring Load Balancing Based on MPLS Labels on DPC I-Chip-Based Hardware
Configuring Load Balancing for Ethernet Pseudowires
Configuring Load Balancing Based on MAC Addresses
Configuring VPLS Load Balancing Based on IP and MPLS Information
Configuring VPLS Load Balancing on MX Series 3D Universal Edge Routers
Example: Configuring Multicast Load Balancing over Aggregated Ethernet Links
Traffic Sampling Configuration Traffic Sampling Configuration
Minimum Traffic Sampling Configuration
Configuring the Output File for Traffic Sampling
Tracing Traffic-Sampling Operations
Configuring Flow Aggregation (cflowd)
Configuring Active Flow Monitoring Using Version 9
Example: Sampling a Single SONET/SDH Interface
Traffic Forwarding and Monitoring Configuration Configuring Traffic Forwarding and Monitoring
Configuring Forwarding Table Filters
Applying Filters to Forwarding Tables
Configuring Discard Accounting
Forwarding Table Filters for Routing Instances on ACX Series Routers
Configuring Load-Balance Groups
Configuring Per-Prefix Load Balancing
Configuring Per-Flow Load Balancing Based on Hash Values
Configuring Routers, Switches, and Interfaces as DHCP and BOOTP Relay Agents
Configuring DNS and TFTP Packet Forwarding
Preventing DHCP Spoofing on MX Series 3D Universal Edge Routers
- Administration
Routing Policy Reference Protocols That Can Be Imported to and Exported from the Routing Table
Routing Tables Affected by Routing Policies
Default Import and Export Policies for Protocols
Summary of Routing Policy Configuration Statements export (Protocols PIM Bootstrap)
Summary of Traffic Sampling, Forwarding, and Monitoring Configuration Statements dhcp-relay (DHCP Spoofing Prevention)
file (Extended DHCP Relay Agent and Helpers Trace Options)
files (Sampling and Traceoptions)
group (DHCP Spoofing Prevention)
interface (Accounting or Sampling)
interface (DHCP Spoofing Prevention)
interface (DNS and TFTP Packet Forwarding or Relay Agent)
server (DHCP and BOOTP Relay Agent)
size (Sampling and Traceoptions)
traceoptions (DNS and TFTP Packet Forwarding)
- Troubleshooting
Knowledge Base
