Switching

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Log Storm Control triggers

  • 1.  Log Storm Control triggers

    Posted 05-26-2021 14:19
    Does anyone have a good way to log what packet/frame triggered  storm control to make it kick in and log ?  
    l2ald[1978]: %DAEMON-1-L2ALD_ST_CTL_IN_EFFECT: xe-0/2/0.0: storm control in effect on the port 

    I have yet to post a Jtac case and I plan too , but wanted to post on here too.
    Id love to see a knob to log  all packets that storm  control drops during until its back within the defined range..

    I have seen this KB posted and I will be lab it up.
    https://kb.juniper.net/InfoCenter/index?page=content&id=KB35880&cat=QFX5120&actp=LIST


  • 2.  RE: Log Storm Control triggers

     
    Posted 05-26-2021 19:04
    Pretty sure logging is only supported if you configure an actual BUM filter instead of built in storm control.

    The basic setting is just there to protect the layer 2 network at a very high level, pretty sure it only kicks in at 80%.  So unless you are running a multicast stream on the port there is likely a loop here.

    Unless the log is happening in as a software error by mistake.

    ------------------------------
    Steve Puluka BSEET - Juniper Ambassador
    IP Architect - DQE Communications Pittsburgh, PA (Metro Ethernet & ISP)
    http://puluka.com/home
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  • 3.  RE: Log Storm Control triggers

    Posted 05-27-2021 09:51
    bonjour, 
    Very interesting.
    right now ,  I am more intent to just get Junos Space to send me a clear warning that a switch actually has storm-control in effect. When reviewing recent broadcast storms events,  I found the event on the switch, but JS did not sent me anything.  I coudl not even find the specific event when looking at the Junos Space  logs. 
    I plan to open a JTAC request on that particular issue. 
    Michel


    ------------------------------
    Michel Lapointe
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  • 4.  RE: Log Storm Control triggers

    Posted 05-27-2021 10:18
    I feel you Michel.
    I just learned I had to set  my syslog  which was set to any any  to ALSO include daemon info to get my ospf recovery logs .  Where without the daemon inf
    it would NOT ever send a recovery adj created  .. It would only send ospf downs..   Saying that you may want to play with your syslog settings and post if you find the solution..

    I will be doing the same on my side and share if I find the secret sauce :)