Policy Framework Configuration Guide - Juniper Networks

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Junos 10.4 Policy Framework Configuration Guide Examples: Configuring AS Path Regular Expressions . . . . . . . . . . . . . . . . . . . 101 Overview of BGP Communities and Extended Communities as Routing Policy Match Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102 Defining BGP Communities and Extended Communities for Use in Routing Policy Match Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104 Defining BGP Communities for Use in Routing Policy Match Conditions . . . 104 Using UNIX Regular Expressions in Community Names . . . . . . . . . . . . . 105 Defining BGP Extended Communities for Use in Routing Policy Match Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107 Examples: Defining BGP Extended Communities . . . . . . . . . . . . . . . . . 109 Inverting Community Matches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109 Including BGP Communities and Extended Communities in Routing Policy Match Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110 How BGP Communities and Extended Communities Are Evaluated in Routing Policy Match Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110 Using Routing Policies to Prevent Advertisement of BGP Communities to Neighbors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111 Examples: Configuring BGP Communities as Routing Policy Match Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111 Configuring Prefix Lists for Use in Routing Policy Match Conditions . . . . . . . . . . . 116 Configuring Prefix Lists . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116 How Prefix Lists Are Evaluated in Routing Policy Match Conditions . . . . . . . 118 Configuring Prefix List Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118 Example: Configuring a Prefix List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119 Configuring Route Lists for Use in Routing Policy Match Conditions . . . . . . . . . . . 119 Configuring Route Lists . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120 How Route Lists Are Evaluated in Routing Policy Match Conditions . . . . . . . 122 How Prefix Order Affects Route List Evaluation . . . . . . . . . . . . . . . . . . . 123 Common Configuration Problem with the Longest-Match Lookup . . . . 124 Route List Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124 Example: Rejecting Routes with Specific Destination Prefixes and Mask Lengths . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125 Example: Rejecting Routes with a Mask Length Greater than Eight . . . . 125 Example: Rejecting Routes with Mask Length Between 26 and 29 . . . . 125 Example: Rejecting Routes from Specific Hosts . . . . . . . . . . . . . . . . . . . 125 Example: Accepting Routes with a Defined Set of Prefixes . . . . . . . . . . 126 Example: Rejecting Routes with a Defined Set of Prefixes . . . . . . . . . . . 126 Example: Rejecting Routes with Prefixes Longer than 24 Bits . . . . . . . . 127 Example: Rejecting PIM Multicast Traffic Joins . . . . . . . . . . . . . . . . . . . . 127 Example: Rejecting PIM Traffic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128 Configuring Subroutines in Routing Policy Match Conditions . . . . . . . . . . . . . . . . 128 Configuring Subroutines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128 Possible Consequences of Termination Actions in Subroutines . . . . . . . 129 Example: Configuring a Subroutine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132 Configuring Routing Policy Match Conditions Based on Routing Table Entries . . 132 Chapter 6 Extended Actions Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135 Prepending AS Numbers to BGP AS Paths . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135 Adding AS Numbers to BGP AS Paths . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136 xii Copyright © 2010, Juniper Networks, Inc.
Table of Contents Using Routing Policies to Damp BGP Route Flapping . . . . . . . . . . . . . . . . . . . . . . 137 Configuring BGP Flap Damping Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . 137 Specifying BGP Flap Damping as the Action in Routing Policy Terms . . . . . 140 Disabling Damping for Specific Address Prefixes . . . . . . . . . . . . . . . . . . . . . 140 Example: Disabling Damping for a Specific Address Prefix . . . . . . . . . . 140 Example: Configuring BGP Flap Damping . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141 Overview of Per-Packet Load Balancing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142 Configuring Per-Packet Load Balancing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 143 Per-Packet Load Balancing Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145 Configuring Load Balancing Based on MPLS Labels . . . . . . . . . . . . . . . . . . . . . . . 146 Configuring Load Balancing for Ethernet Pseudowires . . . . . . . . . . . . . . . . . . . . . 148 Configuring Load Balancing Based on MAC Addresses . . . . . . . . . . . . . . . . . . . . 149 Configuring VPLS Load Balancing Based on IP and MPLS Information . . . . . . . . 150 Configuring VPLS Load Balancing on MX Series Ethernet Services Routers . . . . . 151 Example: Configuring Multicast Load Balancing over Aggregated Ethernet Links . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152 Chapter 7 Summary of Routing Policy Configuration Statements . . . . . . . . . . . . . . . . 165 apply-path . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 165 as-path . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 166 as-path-group . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 167 community . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 168 condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 170 damping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 171 dynamic-db . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 172 export . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 173 import . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 175 policy-options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 176 policy-statement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 177 prefix-list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 179 prefix-list-filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 180 Part 3 Firewall Filters Chapter 8 Introduction to Firewall Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 183 Firewall Filter Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 183 Firewall Filter Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 184 Firewall Filter Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 190 Supported Standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 190 Chapter 9 Firewall Filter Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 191 Configuring Firewall Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 192 Configuring Standard Firewall Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 193 How Firewall Filters Are Evaluated . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 196 Overview of Match Conditions in Firewall Filter Terms . . . . . . . . . . . . . . . . . . . . . 197 Configuring IPv4 Match Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 197 Configuring IPv6 Match Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 202 Configuring Protocol-Independent Match Conditions . . . . . . . . . . . . . . . . . . . . . 206 Configuring Layer 2 Circuit Cross-Connect Match Conditions . . . . . . . . . . . . . . . 206 Configuring MPLS Match Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 208 Copyright © 2010, Juniper Networks, Inc. xiii
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Page 3 and 4: END USER LICENSE AGREEMENT READ THI
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CHAPTER 4 Routing Policy Configurat
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PART 3 Firewall Filters • Introdu
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CHAPTER 10 Introduction to Traffic
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CHAPTER 11 Policer Configuration Si
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PART 5 Indexes • Index on page 46
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Index Symbols ! in policy expressio
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Index Layer 2 bridging traffic (MX
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Index P P2MP.......................
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Index of Statements and Commands A
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Index of Statements and Commands si
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Policy Framework Configuration Guide - Juniper Networks

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