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  • 1.  EX Analyzer/Port Mirror - Number of VLAN output interfaces

    Posted 05-30-2023 05:25

    Hi,
    we have many EX platforms inside our network and need to mirror many source VLANs to at least two physical ports.
    On EX4600 and EX4650 we tried to accomplish this using an output VLAN and assign ports to them. But this fails since traffic is only mirrored to one output port. On EX9200 it works for both.

    Can you tell me how to resolve this (do 2 physical output interfaces work?) and can you tell me which platforms have this limitation since its not inside documentation (screenshot). 

    interfaces { 
        xe-0/0/0 {
            unit 0 {
                family ethernet-switching {
                    interface-mode access;
                    vlan {
                        members 1000;
                    }
                }
            }
        }
        xe-0/0/1 {
            unit 0 {
                family ethernet-switching {
                    interface-mode access;
                    vlan {
                        members 1000;
                    }
                }
            }
        }
    }
    forwarding-options  { 
        analyzer {
            ANALYZER-SPAN {
                input {
                    ingress {
                        vlan 2000;
                        vlan 2001;
                    }
                    egress {
                        vlan 2000;
                        vlan 2001;              
                    }
                }
                output {
                    vlan {
                        1000;
                    }
                }
            }
        }
    }
    vlans {
        V1000-SPAN-DUMMY {                             
            vlan-id 1000;
        }
    }


    Thanks and Best Regards



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  • 2.  RE: EX Analyzer/Port Mirror - Number of VLAN output interfaces

    Posted 05-31-2023 14:48

    Here is what we have on our EX4600.  Only one output.  Works great.   

    xe-0/2/6 {
            description "Security NIC1";
            unit 0 {
                family ethernet-switching;

        SECURITY-VLAN-MONITOR {
                input {
                    ingress {
                        vlan 1-69;
                        vlan 110;
                    }
                }
                output {
                    interface xe-0/2/6.0;




  • 3.  RE: EX Analyzer/Port Mirror - Number of VLAN output interfaces

    Posted 06-01-2023 06:32

    Yes, this also works great for us. But we need two output interfaces.

    This, so far only works with EX9200, but we need a solution for EX4600/4650.



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