Alcatel-Lucent 6850-48 网络指南

Configuring QoS

Policy Applications

OmniSwitch AOS Release 6 Network Configuration Guide

page 40-61

• Policy based mirroring and the port-based mirroring feature can run simultaneously on the same port. 

However, policy based mirroring is not supported on the OmniSwitch 6800. 

• Rule precedence is applied to all mirroring policies that are configured for the same switch ASIC. If 

traffic matches a mirror rule on one ASIC with a lower precedence than a non-mirroring rule on a 
different ASIC, the traffic is mirrored in addition to the actions specified by the higher precedence rule.

Policies may be configured for ICMP on a global basis on the switch. ICMP policies may be used for 
security (for example, to drop traffic from the ICMP blaster virus).

In the following example, a condition called icmpCondition is created with no other condition parame-
ters:

-> policy condition icmpCondition ip protocol 1

-> policy action icmpAction disposition deny

-> policy rule icmpRule condition icmpCondition action icmpAction

This policy (icmpRule) drops all ICMP traffic. To limit the dropped traffic to ICMP echo requests (pings) 
and/or replies, use the 

 to specify the appropriate condition. For example,

-> policy condition echo icmptype 8

-> policy condition reply icmptype 0

802.1p values may be mapped to different 802.lp values on an individual basis or by using a map group. In 
addition, ToS or DSCP values may be mapped to 802.1p on a case-by-case basis or via a map group. 
(Note that any other mapping combination is not supported.) 

Marking is accomplished with the following commands:

Mapping is accomplished through the following commands:

Note the following:

• Priority for the flow is based on the policy action. The value specified for 802.1p, ToS, DSCP, or the 

map group will determine how the flow is queued.

• The port on which the flow arrives (the ingress port) must be a trusted port. For more information 

about trusted ports, see 

In this example, a policy rule (marking) is set up to mark flows from 10.10.3.0 with an 802.1p value of 5:

-> policy condition my_condition source ip 10.10.3.0 mask 255.255.255.0

-> policy action my_action 802.1p 5

-> policy rule marking condition my_condition action my_action