Switching

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

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

benboy5...

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

-Chuck