L2 Channel Errors between J6360 and EX3200



  • So my setup is pretty simple.  Layer3 interfaces are created on my J series and get trunked to EX which in turn trunks to another Cisco switch where my servers reside.  Issues is on the link between j6350 -> Ex3200 I am getting incrementing L2 channel errors.  This is supposed to be due to the interface receiving a frame where a vlan isnt configured, but I made sure vlans match on both devices yet I am still getting errors.  Any ideas?  Here is my config.

    Juniper J6350:

    J6360> show interfaces extensive ge-3/0/15 | match L2
        Errors: 0, Drops: 0, Framing errors: 0, Runts: 0, Policed discards: 537, L3 incompletes: 0, L2 channel errors: 8051,
        L2 mismatch timeouts: 0, FIFO errors: 0, Resource errors: 0

    Interface config for ge-3/0/15:

    description ""
    vlan-tagging;
    speed 1g;
    mtu 1950;
    link-mode full-duplex;
    gigether-options {
        no-auto-negotiation;
    }
    unit 0 {
        vlan-id 1;
    }
    unit 500 {
        vlan-id 500;
    }
    unit 700 {
        description “”;
        vlan-id 700;
        family inet {
            address 192.168.0.254/24;
            address 192.168.8.254/24;
        }
    }
    unit 900 {
        description “”;
        vlan-id 900;
        family inet {
            address 192.168.3.254/24;
        }
    }

    EX3200:
    description “SUPERTRUNK TO GE-3/0/15.TOSA-EDGE1”;
    mtu 1950;
    ether-options {
        no-auto-negotiation;
        link-mode full-duplex;
        speed {
            1g;
        }
    }
    unit 0 {
        family ethernet-switching {
            port-mode trunk;
            vlan {
                members [ TOSA-VC TOSA-SB-LAN TOSA-WAN ];
            }
            native-vlan-id default;
        }
    }

    Name          Tag    Interfaces
    TOSA-SB-LAN    700   
                          ge-0/0/1.0*, ge-0/0/8.0*
    TOSA-VC          900   
                          ge-0/0/1.0*, ge-0/0/2.0*, ge-0/0/3.0*, ge-0/0/4.0*, ge-0/0/6.0*, ge-0/0/7.0*, ge-0/0/8.0*
    TOSA-WAN      500   
                          ge-0/0/1.0*, ge-0/0/8.0*
    default        999   
                          ge-0/0/1.0*, ge-0/0/8.0*, ge-0/0/9.0, ge-0/0/10.0, ge-0/0/11.0, ge-0/0/12.0, ge-0/0/13.0, ge-0/0/14.0,
                          ge-0/0/15.0, ge-0/0/16.0, ge-0/0/17.0, ge-0/0/18.0, ge-0/0/19.0, ge-0/0/20.0, ge-0/0/21.0, ge-0/0/22.0,
                          ge-0/0/23.0, ge-0/0/24.0, ge-0/0/25.0, ge-0/0/26.0, ge-0/0/27.0, ge-0/0/28.0, ge-0/0/29.0, ge-0/0/30.0,
                          ge-0/0/31.0, ge-0/0/32.0, ge-0/0/33.0, ge-0/0/34.0, ge-0/0/35.0, ge-0/0/36.0, ge-0/0/37.0, ge-0/0/38.0,
                          ge-0/0/39.0, ge-0/0/40.0*, ge-0/0/41.0, ge-0/0/42.0, ge-0/0/43.0*, ge-0/0/44.0, ge-0/0/45.0, ge-0/0/46.0

    Thanks in advance.



  • Seems like there is a L2 encapsulation mismatch… 🙂


 

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