Switching

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Ask questions and share experiences about EX and QFX portfolios and all switching solutions across your data center, campus, and branch locations.

  • 1.  LACP keep flapping on ae0 link

    Posted 04-09-2013 22:21

    Hi Team,

     

    I am looking for some help here

     

    one of my ex-2200 switch is connected with ex-4200 switch with aggregated etherenet

     

    I am keep getting below mentioned messages on ex-2200 switch that shows LACPD changes. whenever these messages are coming, people connected with ex-2200 switches experiences intermittent connectivity loss to their mail, communicator. but after 5 minutes, they will again come to normal and can start working. this is a weird behavior we are observing since 3-4 days, only from this switch.

     

    Apr  9 16:03:04  EX-2200-SW lacpd[1046]: LACPD_TIMEOUT: ge-0/1/0: lacp current while timer expired current Receive State: CURRENT

     

    below is connectivity to EX-4200 switch from EX-2200

     

    admin@EX-2200-SW> show lldp neighbors
    Local Interface Parent Interface Chassis Id Port info System Name
    ge-0/1/0.0 ae0.0 50:c5:8d:ab:f6:c0 ge-1/0/2.0 EX-4200-SW
    ge-0/1/1.0 ae0.0 50:c5:8d:ab:f6:c0 ge-3/0/0.0 EX-4200-SW

     

    if someone has already face this issue in past, please share your experience.

     

    admin@EX-2200-SW> show spanning-tree bridge detail

    STP bridge parameters
    Context ID : 0
    Enabled protocol : RSTP
    Root ID : 4096.50:c5:8d:b0:55:41
    Root cost : 40000
    Root port : ae0.0
    Hello time : 2 seconds
    Maximum age : 20 seconds
    Forward delay : 15 seconds
    Message age : 3
    Number of topology changes : 43
    Time since last topology change : 29574 seconds
    Topology change initiator : ae0.0
    Topology change last recvd. from : 50:c5:8d:ab:f6:c6
    Local parameters
    Bridge ID : 32768.50:c5:8d:a7:12:81
    Extended system ID : 0
    Internal instance ID : 0
    Hello time : 2 seconds
    Maximum age : 20 seconds
    Forward delay : 15 seconds
    Path cost method : 32 bit

     

     

     



  • 2.  RE: LACP keep flapping on ae0 link

    Posted 04-10-2013 09:30

    >show interfaces ae0.0 extensive

    You should be able to see some errors. Verify that the speeds/duplex/modes of all the links are the same.

    Check physical cables. I saw that happening for almost a day, only to realize it was a bad cable. Not withstanding that all cables were replaced a week earlier:)