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Diferents VLANs with the same layer 3 interface

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  • 1.  Diferents VLANs with the same layer 3 interface

    Posted 10-30-2018 07:19

    Hello,

    we have a MX960 router and the following doubt:
    We have an Interface (2*10G, ae0 link agregation) with interconexion from other operator from whom we are using their access network infrastructure to give service to subscribers (type GPON/DSL). These subscribers are using IPoE (DHCP) and NOT PPPoE.
    we get 1 802.1Q VLAN for each location, in total about 50 VLANs. These VLANs need to use the same Layer 3 interface, as we do not want to segment our public IP address space, but rather use the address space /21 as 1 pool. BUT as using IPoE we also need to separate the broadcast space, so that broadcast like ARP and others from 1 VLAN are NOT propagated to the other VLANs.

    Can you please indicate hoy this can be done on the MX960?

    Thank you



  • 2.  RE: Diferents VLANs with the same layer 3 interface

    Posted 10-31-2018 01:01

    Hello JGalindo

     

    The aggregate interface allows vlan-id tagging. You can create logical interfaces under the aggregate interface and tag each logical interface with its own vlan.

     

    Another option is to use "vlan-id-list" and "vlan-id-range" on a single logical interface to associate multiple vlans on the same logical interface

     

    Regards

    P.S.I. Basondole 



  • 3.  RE: Diferents VLANs with the same layer 3 interface
    Best Answer

    Posted 10-31-2018 02:39

    Hello.

    As i understood you need to use something like that:

     

     show interfaces lo0 unit 0
    family inet {
        address 10.10.10.1/32;
    }
    
    show interfaces ae2.4083

    description "Access interface"; proxy-arp unrestricted; vlan-id 4083; family inet { mtu 1500; unnumbered-address lo0.0; }
    show routing-options static
    
        route 10.10.10.2/32 {
            qualified-next-hop ae2.4083;
        }
    

     

    If you need broadcast go to other interface than you must enable proxy-arp.



  • 4.  RE: Diferents VLANs with the same layer 3 interface

    Posted 12-04-2018 06:26

    Thanks for yours answers.

     

    At the begining, I had some problems but it was solved changing the switch.