Juniper JNCIA-Junos - Class of Service

For this last chapter, you are going to mark some traffic.

Exercise – Marking packets

Your goal is to create a filter that you will apply on JUNOS1′s em4 interface (input). This filter will mark all packets from 10.3.3.0/24 with expedited-forwarding (EF) DSCP.

Solution

firewall {
    family inet {
        filter apply-cos {
            term from-JUNOS3 {
                from {
                    source-address {
                        10.3.3.0/24;
                    }
                }
                then {
                    forwarding-class expedited-forwarding;
                    accept;
                }
            }
            term default {
                then accept;
            }
        }
    }

em4 {
     unit 0 {
         family inet {
             filter {
                 input apply-cos;
             }
             address 172.30.25.9/30;
         }
     }
 }

This is the end of our hands-on exercises, you should now be ready to seat for the

JNCIA-Junos certification. Don’t forget you can obtain 50% off the exam cost by passing the pre-assessment exam on Juniper’s website.