[c-nsp] storm-control errdisable with no traffic or vlan

Saku Ytti saku at ytti.fi
Thu Aug 4 01:55:51 EDT 2022

On Thu, 4 Aug 2022 at 02:06, Joe Maimon via cisco-nsp
<cisco-nsp at puck.nether.net> wrote:

> I have a vendor trying to turn up a 10gb link from their juniper mx to a
> cisco 4900M, using typical X2 LR.
> The link was being upgraded from a functioning 1gb. Same traffic.

10G will serialise packets 10x faster. Even if the average packet rate
is the same, you can have a 10x faster traffic rate on smaller
sampling intervals, which may exceed configured protection rates.

> Even with switchport mode trunk and switchport allowed vlan none, with
> input counters in single digits, storm control immediately takes the
> port down after link up. There was negligible traffic on the link before
> or after the attempt.

Broadcast, multicast or unicast storm-control? What rate? Have you
tried increasing the rate? Can you provide the logs of storm-control
taking the port down?


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