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  • 1.  EX4500 LAG to Cisco 6506

    Posted 02-06-2012 13:18

    Hi all,

     

    I'm trying to get an EX4500s to talk L2 trunk to a Cisco 6506 over a pair of 1G Ethernet optics via a port-channel (po10) and LAG (ae1) so that I have redundancy and more bandwidth.  I have locked down the negotiation, as seems prudent when dealing with two vendors.  The inertfaces on both sides come up and seem to pass traffic.  The LAG (ae1) comes up as well, but the Cisco port-channel does not.  Snips of the code and status follows.  Can someone help or point me at a best practice guide on inter-vendor LAG connectivity? 

     

    Tx!

     

    -Chuck

     

    =====================================

     

    Juniper code:

    ge-0/0/1 {
        description "ae1 LAG member - L2 to SCH6506R (East)";
        ether-options {
            no-auto-negotiation;
            link-mode full-duplex;
            speed {
                1g;
            }
            802.3ad ae1;
        }
    }
    ge-0/0/2 {
        description "ae1 LAG member - L2 to SCH6506R (East)";
        ether-options {
            no-auto-negotiation;
            link-mode full-duplex;
            speed {
                1g;
            }
            802.3ad ae1;
        }
    }
    ae1 {
        description "L2 LAG to SCH6506R (East)";
        unit 0 {
            family ethernet-switching {
                port-mode trunk;
                vlan {
                    members all;
                }
                native-vlan-id 1;
            }
        }
    }

     

    Juniper status:

    Interface       Admin Link Description
    ge-0/0/1        up    up   ae1 LAG member - L2 to SCH6506R (East)
    ge-0/0/2        up    up   ae1 LAG member - L2 to SCH6506R (East)
    ae1             up    up   L2 LAG to SCH6506R (East)

     

    Cisco code:

    !
    interface GigabitEthernet4/1
     description HOLD - L2 to Juniper EX4500 (to OLV DC)
     switchport
     switchport trunk encapsulation dot1q
     switchport trunk allowed vlan 1000
     switchport mode trunk
     logging event link-status
     logging event trunk-status
     speed nonegotiate
    channel-group 10 mode desirable
    end
    !
    interface GigabitEthernet4/2
     description HOLD - L2 to Juniper EX4500 (to OLV DC)
     switchport
     switchport trunk encapsulation dot1q
     switchport trunk allowed vlan 1000
     switchport mode trunk
     logging event link-status
     logging event trunk-status
     speed nonegotiate
    channel-group 10 mode desirable
    end
    !
    interface Port-channel10
     description L2 to Juniper EX4500 (to OLV DC)
     switchport
     switchport trunk encapsulation dot1q
     switchport trunk allowed vlan 1000
     switchport mode trunk
     logging event link-status
     logging event trunk-status
     speed nonegotiate
     mls qos trust cos
    end

    Cisco status:

    Port         Name               Status       Vlan       Duplex  Speed Type
    Gi4/1        HOLD - L2 to Junip connected    trunk        full   1000 1000BaseSX
    Gi4/2        HOLD - L2 to Junip connected    trunk        full   1000 1000BaseSX
    Po10         L2 to Juniper EX45 notconnect   unassigned   auto   auto



    #ex4500
    #Juniper
    #LAG
    #port-channel
    #cisco
    #6506
    #trunk


  • 2.  RE: EX4500 LAG to Cisco 6506

    Posted 02-06-2012 17:12

    you may want to try this: 

    set interfaces ae1 aggregated-ether-options lacp active 

     

    If that doesn't work, you may want to get rid of the "speed nonegotiate" on the Crisco

     

    Also, I've mostly used "channel-group 10 mode active" instead of desirable



  • 3.  RE: EX4500 LAG to Cisco 6506
    Best Answer

    Posted 02-07-2012 06:54

    benboy5...

     

    Thanks!  That was the issue... had to force LACP on both sides.  Working like a champ now.

     

    -Chuck