JUNOSe 9.1.x Policy Management Configuration Guide > Creating Classifier Groups and Policy Rules > Policy Rule Precedence

Policy Rule Precedence

Because of the flexibility in creating policy lists and classifier groups, you can configure a classifier group that has multiple policy rules.

If a classifier group has multiple rules, the router uses the rules according to their precedence—not in the order in which you created the rules. The first rule listed (the forward rule) for a policy list type has the highest precedence and the last rule has the lowest. The precedence is based on the order in which the router performs rules. Rules are performed in order from lower to higher precedence. In the event of a conflict, a higher precedence rule overrides the lower precedent rule.

The precedence of rules is important if you want a specific rule to be applied. For example, if an IP policy list has both a rate-limit-profile rule (which specifies a color) and a color rule in the same classifier-group, the color specified by the color rule is always used rather than the color implied in the rate-limit-profile rule (the color rule has a higher precedence).

Table 5 lists the policy rule commands that you can use for each type of policy list. The table lists the rules in their order of precedence.

NOTE: The ES2 10G Uplink LM and the ES2 10G LM support only IP, MPLS, and VLAN interfaces.

Table 5: Policy Rule Commands and Precedence 

ATM	Frame Relay	GRE	IP	IPv6	L2TP	MPLS	VLAN
forward	forward	forward	forward	forward	forward	forward	forward
color	color	color	forward interface (input, secondary input, and output policies only)	color	color	color	color
–	–	–	exception for input and secondary input policies only (not supported on ES2 10G Uplink LM or ES2 10G LM)	–	–	–	–
mark-clp (See mark-clp command for platform support information.)	mark-de	mark	forward next-hop for input policies only	rate-limit- profile	rate-limit- profile	rate-limit- profile	mark-user- priority
filter	filter	filter	color	user-packet- class	filter	mark-exp	filter
user-packet- class	user-packet- class	user-packet- class	rate-limit- profile	traffic-class	user-packet- class	filter	user-packet- class
traffic-class	traffic-class	traffic-class	user-packet- class	mark	traffic-class	user-packet- class	traffic-class
–	–	–	traffic-class	filter	–	traffic-class	–
–	–	–	mark	–	–	–	–
–	–	–	filter	–	–	–	–
–	–	–	log (not supported on ES2 10G Uplink LM or ES2 10G LM)	–	–	–	–

NOTE: The commands listed in this section replace the Policy List Configuration mode versions of the commands. For example, the color command replaces the Policy List Configuration mode version of the color command. The original command may be removed completely in a future release.

Related Topics

• Classifier Groups and Policy Rules Overview
• Chapter 9, Monitoring Policy Management
• color command
• color-mark-profile command
• filter command
• green-mark command
• log command
• mark command
• mark-clp command
• mark-de command
• mark-exp command
• mark-user-priority command
• next-hop command
• next-interface command
• rate-limit-profile command
• red-mark command
• reference-rate command
• traffic-class command
• user-packet-class command
• yellow-mark command