Junos OS

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Log Storm Control triggers

  • 1.  Log Storm Control triggers

    Posted 27 days ago
    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 27 days ago
    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 27 days ago
    Thanks Steve.
    I will run the filter with the polices to gain more insight for the few areas I see this .
    We run our storm control a lot more aggressive than 80%  and during this  I have leaned BACNET is not a good  thing.
    Plus 4k+ devices in single layer 2 domain spanning WAY WAY to many hops.



  • 4.  RE: Log Storm Control triggers

    Posted 26 days ago
    Bonjour Steve, 
    can you suggest a way for me to get warned when a switch goes into storm control in effect ?  I can see the message in the switch log when the smoke clear, but I'd like the switch to send me a alert that it has gone into that mode so I know something fishy is going on. .  We have Junos Space up, but I can't seem to find my wat around getting it to warn me of the situation.
    Thanks
    Michel

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

    Posted 26 days ago
    Michel.  Im playing with my syslog facilities .  Odd as they are all posted as same severity and facility.


    # help syslog L2ALD_ST_CTL
    Name: L2ALD_ST_CTL_DISABLED
    Message: <interface-name>: storm control disabled port
    Help: Storm control disabled an interface
    Description: This condition occurs when storm control condition is detected.
    Type: Event: This message reports an event, not an error
    Severity: alert
    Facility: LOG_DAEMON

    Name: L2ALD_ST_CTL_ENABLED
    Message: <interface-name>: storm control enabled port
    Help: Storm control cleared from an interface
    Description: This condition occurs when storm-control condition is cleared.
    Type: Event: This message reports an event, not an error
    Severity: alert
    Facility: LOG_DAEMON


    Name: L2ALD_ST_CTL_IN_EFFECT
    Message: <interface-name>: storm control in effect on the port
    Help: Storm control in effect an interface
    Description: This condition occurs when storm control condition is detected.
    Type: Event: This message reports an event, not an error
    Severity: alert
    Facility: LOG_DAEMON-------------------------------------------

    EDIT Jun 21.
    I have been tuning my profiles and I have only seen   %DAEMON-1-L2ALD_ST_CTL_IN_EFFECT  .  If the profile is not set to disable the port you will not see any eanble or disable  notifications, which makes since. It would be a nice feature for Junos to add  if anyone out there is reading this to log
    %DAEMON-1-L2ALD_ST_CTL_NOT_IN_EFFECT   :).


    Original Message:
    Sent: 05-27-2021 18:50
    From: Michel Lapointe
    Subject: Log Storm Control triggers

    Bonjour Steve, 
    can you suggest a way for me to get warned when a switch goes into storm control in effect ?  I can see the message in the switch log when the smoke clear, but I'd like the switch to send me a alert that it has gone into that mode so I know something fishy is going on. .  We have Junos Space up, but I can't seem to find my wat around getting it to warn me of the situation.
    Thanks
    Michel

    ------------------------------
    Michel Lapointe