Junos
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Junos

behavior aggregate classifier COS configuration

‎02-22-2015 05:18 AM

Why is the answer A? Thanks in advanced

 

[edit class-of-service]

user@router# show

interfaces {

ge-0/0/2 {

unit 0 {

classifiers {

inet-precedence default;

}

}

}

}

 

A. behavior aggregate
B. policer
C. multifield
D. forwarding policy

3 REPLIES 3
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Junos

Re: behavior aggregate classifier COS configuration

‎02-22-2015 11:08 PM

The behavior aggregate (BA) classifier maps a class-of-service (CoS) value to a forwarding class and loss priority. The forwarding class determines the output queue.

 

Check more here:

 

https://www.juniper.net/documentation/en_US/junos12.3/topics/concept/classifier-ba-overview-cos-conf...




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Junos

Re: behavior aggregate classifier COS configuration

‎02-23-2015 12:30 AM

I read the url on the BA Classifier, however I am still not sure as based on the configuration shown in the initial post, how can we see which classifer it belongs to?

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Junos
Solution
Accepted by topic author kennethgoh
‎08-26-2015 01:27 AM

Re: behavior aggregate classifier COS configuration

‎02-23-2015 12:37 AM

You don't have the complete configuration there for BA.

 

You need also to define the classifier. In your configuration, you should apply the classifier to ge-0/0/2.

 

A more complete configuration would be this:

 

[edit]
lab@vastar-re0# show class-of-service
classifiers {
    inet-precedence default {
        forwarding-class assured-forwarding {
            loss-priority low code-points [ 001 010 ];
        }
    }
}
interfaces {
    ge-0/0/2 {
        unit 0 {
            classifiers {
                inet-precedence default;
            }
        }
    }
}

[edit]
lab@vastar-re0#

 

This means that if a packet is coming from interface ge-0/0/2 and has the precedence 001 or 010, the it will be assigned to class assured-forwarding.

 



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