Switching

Hi,

i have two aggregated interfaces with 1 physical interface each. (ae0 and ae1)

Problem is that interface ae1 is showing "hardware down" even the physical interface is up: 

adm@ex-test0# run show interfaces terse |match ae
ge-0/0/22.0 up up aenet --> ae1.0
ge-0/0/23.0 up up aenet --> ae0.0
ae0 up up
ae0.0 up up eth-switch
ae1 up down
ae1.0 up down

Problem persists if i swap the interfaces ge-0/0/22 and /23 in the configuration and and/or the cables connecting to them.

ae0 is always UP and showing protocol eth-switch and ae0 always down, not showing any protocol. 

so i'm sure its not related to the physical port.

any ideas? 

Both ae0 and ae1 have the same configuration and are in the same vlan:

adm@ex-test0# show interfaces ae0 
aggregated-ether-options {
    lacp {
        active;
    }
}
unit 0 {
    family ethernet-switching {
        port-mode trunk;
        vlan {
            members srx-reth1;
        }
    }
}

{master:0}[edit]
adm@ex-test0# show interfaces ae1 
aggregated-ether-options {
    lacp {
        active;
    }
}
unit 0 {
    family ethernet-switching {
        port-mode trunk;
        vlan {
            members srx-reth1;
        }
    }
}

Is it possible that the other side of the link is not properly responding to the LACP frames?  Can you show the output of show lacp interfaces?  The whole point of using LACP is to provide a method to drop the AE interface if the remote host is unresponsive, even though we still have physical link (otherwise the system would drop the bundle itself without the need for a supervisory protocol).

Ron

hi,

the other side is an SRX Chassis Cluster, with one redundant interface, two member interfaces connected to the interfaces on EX.

(SRX ge-0/0/5 in reth1 connected to EX ge-0/0/23 and SRX ge-5/0/5 in reth1 connected to EX ge-0/0/22)

BUT as i said, if i switch the cabling, connecting SRX ge-0/0/5 to EX ge-0/0/22 and SRX 5/0/5 to EX 0/0/23, ae1 still remains down. no matter if i failover the chassis cluster, or if i configure ge-0/0/22 in ae0 and ge-0/0/23 in ae1, it is ALWAYS ae1 that is down.

btw if i go for >show vlans, there is only ae0.0* in vlan.255. not ae1

(i will post > show lacp interface output later, cant connect right now,.)

SRX chassis-cluster is an active/passive failover group of ports.  If you have that setup on the SRX, then the ports on the EX should not be configured as an AE, but rather as two members of VLAN or as two trunk ports (for multiple VLAN support).  LACP is designed to bond two interfaces together in an active/active group.  You can configure LACP on ports in an SRX chassis-cluster, but that is not a RETH interface.

Ron

Yes, you may turn off the LACP active and try.

I had a similar problem:

ae0                     up    down
ae0.0                   up    down inet     192.168.10.254/24

i removed the lacp on the switch side, and made it active on the srx and did a commit. I then changed it back for the SRX to be passive and made the swtich active and it came up:

ae0                     up    up  
ae0.0                   up    up   inet     192.168.10.254/24

SRX:

set interfaces ge-0/0/1 gigether-options 802.3ad ae0
set interfaces ge-0/0/2 gigether-options 802.3ad ae0
set interfaces ae0 aggregated-ether-options minimum-links 1
set interfaces ae0 aggregated-ether-options lacp passive
set interfaces ae0 unit 0 family inet address 192.168.10.254/24

EX site:

set interfaces ge-0/0/15 ether-options 802.3ad ae4
set interfaces ge-0/0/16 ether-options 802.3ad ae4
set interfaces ae4 aggregated-ether-options minimum-links 1
set interfaces ae4 aggregated-ether-options lacp active
set interfaces ae4 unit 0 family ethernet-switching vlan members VLAN-24
set vlans VLAN-24 interface ae4.0