SRX

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Ask questions and share experiences about the SRX Series, vSRX, and cSRX.

  • 1.  Cisco Switch Trunk port flapping?

    Posted 11-10-2009 06:41

    I have made a reth group with vlan-tagging.

     

    On my primary srx its link to a cisco 4500 is stable

    on my secondary srx its link to another cisco 4500 is bouncing between trunk and non-trunk port?

     

    Cisco port config:

     

    switchport trunk encapsulation dot1q
     switchport trunk allowed vlan 12,15,16
     switchport mode trunk

     switchport nonegotiate
     load-interval 30

     

    same on both Cisco Switches

     

     

    messages I am getting on the second cisco

    203235: .Nov 10 14:14:42: %DTP-5-TRUNKPORTON: Port Gi4/5 has become dot1q trunk
    203236: .Nov 10 14:14:43: %DTP-5-NONTRUNKPORTON: Port Gi4/5 has become non-trunk

     



  • 2.  RE: Cisco Switch Trunk port flapping?

    Posted 11-10-2009 07:16

    For some reason my Cisco switch with the flapping goes to :

     

    Gi4/10           Desg BLK 4         128.202  P2p

     

    the goes down again.

     

    we are running pvstp+ on this cisco box.

     

    I also see on my non-flapping Cisco switch that the SRX is not seen as an EDGE port which is what I would have thought it would have appeared as.

     

     

     



  • 3.  RE: Cisco Switch Trunk port flapping?
    Best Answer

    Posted 11-10-2009 08:25

    Turned out to be a faulty patch cord causing the problems.

     

    swapped out and is now rock solid.