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LACP issue on vMX 18.2R1.9 - ae0 interface is always down

  • 1.  LACP issue on vMX 18.2R1.9 - ae0 interface is always down

    Posted 22 days ago

    Hi All,

     

    I have set up two vMX routers, activated the trial license, configured lite-mode for the FPCs, and set network-services to enhanced-ip

     

    Running these vmX on KVM with virtio-net-pci interface

    SR-IOV is not enabled.

     

    The two gig interface are up but ae0 interface remains down

     

    root@R2> show interfaces terse
    Interface Admin Link Proto Local Remote

    ge-0/0/3 up up
    ge-0/0/3.0 up up aenet --> ae0.0
    ge-0/0/4 up up
    ge-0/0/4.0 up up aenet --> ae0.0

    ae0 up down
    ae0.0 up down inet 172.31.129.2/30
    multiservice

     

    vMX#1 configuration

    chassis {
    aggregated-devices {
    ethernet {
    device-count 3;
    }
    }
    fpc 0 {
    lite-mode;
    }
    network-services enhanced-ip;
    }
    interfaces {
    ge-0/0/3 {
    gigether-options {
    802.3ad ae0;
    }
    }
    ge-0/0/4 {
    gigether-options {
    802.3ad ae0;
    }
    }
    ae0 {
    description vMX-1;
    aggregated-ether-options {
    lacp {
    active;
    }
    }
    unit 0 {
    family inet {
    address 172.31.129.1/30;
    }
    }
    }

     

    vMX#2 Configuration

    chassis {
    aggregated-devices {
    ethernet {
    device-count 3;
    }
    }
    fpc 0 {
    lite-mode;
    }
    network-services enhanced-ip;
    }
    interfaces {
    ge-0/0/3 {
    gigether-options {
    802.3ad ae0;
    }
    }
    ge-0/0/4 {
    gigether-options {
    802.3ad ae0;
    }
    }
    ae0 {
    description vMX-2;
    aggregated-ether-options {
    lacp {
    active;
    }
    }
    unit 0 {
    family inet {
    address 172.31.129.2/30;
    }
    }
    }

     

     

    Is there anything wrong with this configuration that could cause the AE0 interface to be down.

     

    Thanks for your reply

    Stephane



  • 2.  Betreff: LACP issue on vMX 18.2R1.9 - ae0 interface is always down

     
    Posted 22 days ago

    Hello Stephane,

     

    physical interfaces on vMX are always up, even there is nothing connected to it. I'd suggest you to configure the physical interfaces as "family inet" ports with a /30 subnet at first, and check if pings are working to the vMX counterpart. If both "ge-" interfaces have connectivity to the other vMX, then you can proceed with configuring the ae interface.



  • 3.  RE: LACP issue on vMX 18.2R1.9 - ae0 interface is always down

     
    Posted 6 days ago
    Is the other side configured with LACP?  What do you see if you enter show lacp interfaces or show lacp statistics

    Regards,

    ------------------------------
    Yasmin Lara
    Juniper Ambassador
    JNCIE-SP, JNCIE-ENT, JNCIE-DC, JNCIE-SEC
    JNCDS-DC, JNCIA-DevOps, JNCIP-CLOUD, CCNP-ENT
    ------------------------------



  • 4.  RE: LACP issue on vMX 18.2R1.9 - ae0 interface is always down

     
    Posted 6 days ago
    Try set interfaces ae0 aggregated-ether-options lacp force-up on both sides.  LACP messages might not be supported across the bridge connecting the two  vMX instances in your setup.

    Regards,

    ------------------------------
    Yasmin Lara
    Juniper Ambassador
    JNCIE-SP, JNCIE-ENT, JNCIE-DC, JNCIE-SEC
    JNCDS-DC, JNCIA-DevOps, JNCIP-CLOUD, CCNP-ENT
    ------------------------------