Hi,

I also have 2 x EX4550 in VC with storm-control enabled, but it never
happens to me to get that message on commit;

I have this configuration for storm-control:

set ethernet-switching-options storm-control interface all

I am wondering what is your configuration for the ae2.0 interface:
can you check that ? which physical interfaces are on ae2 ? what are
their configurations? Maybe there is a loop somewhere in between
those.

we have this one:

interface all {
    level 1;
}


ae2 is actually a LACP channel containing 2x 10GE to a customer. Generally yes there might be a potential loop behind. The curious part is however that this message mostly appears on commits and not necessarily also without a commit. This is not limited to our EX4550 VC but can also be seen on some EX3300 ToR switches. Typically all with storm-control level 1-5 configured.

Also, can you check your log messages ? if you do a "help syslog
ESWD_ST_CTL_ERROR_IN_EFFECT" it tells you:

Yes, that happens every once in a while. Although I cannot guarantee this is not loop-caused, the impact to our network caused by loops is was typically clearly visible by disappearing ARP entries on the routers and/or jumping MACs (at least until we set storm-control low enough which is even < 1% so we use the bandwidth option here).


Best,
Jeff
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