Policy Framework Configuration Guide - Juniper Networks

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Junos 10.4 Policy Framework Configuration Guide Table 4: Implementation Differences Between Routing Policies and Firewall Filters (continued) Policy Architecture Routing Policy Implementation Firewall Filter Implementation Default policies and actions If an incoming or outgoing route arrives and a policy related to the route is not explicitly configured, the action specified by the default policy for the associated routing protocol is taken. The following default actions exist for routing policies: • If a policy does not specify a match condition, all routes evaluated against the policy match. • If a match occurs but the policy does not specify an accept, reject, next term, or next policy action, one of the following occurs: • The next term, if present, is evaluated. • If no other terms are present, the next policy is evaluated. • If no other policies are present, the action specified by the default policy is taken. • If a match does not occur with a term in a policy and subsequent terms in the same policy exist, the next term is evaluated. • If a match does not occur with any terms in a policy and subsequent policies exist, the next policy is evaluated. • If a match does not occur by the end of a policy and no other policies exist, the accept or reject action specified by the default policy is taken. If an incoming or outgoing packet arrives on an interface and a firewall filter is not configured for the interface, the default policy is taken (the packet is accepted). The following default actions exist for firewall filters: • If a firewall filter does not specify a match condition, all packets are considered to match. • If a match occurs but the firewall filter does not specify an action, the packet is accepted. • If a match occurs, the defined or default action is taken and the evaluation ends. Subsequent terms in the firewall filter are not evaluated, unless the next term action is specified. • If a match does not occur with a term in a firewall filter and subsequent terms in the same filter exist, the next term is evaluated. • If a match does not occur by the end of a firewall filter, the packet is discarded. 12 Copyright © 2010, Juniper Networks, Inc.
PART 2 Routing Policies • Introduction to Routing Policy on page 15 • Routing Policy Configuration Statements on page 35 • Routing Policy Configuration on page 39 • Extended Match Conditions Configuration on page 95 • Extended Actions Configuration on page 135 • Summary of Routing Policy Configuration Statements on page 165 Copyright © 2010, Juniper Networks, Inc. 13
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CHAPTER 10 Introduction to Traffic
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PART 5 Indexes • Index on page 46
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