Storm Control

Owned by Jean-luc KRIKER
Last updated: Sept 23, 2020
1 min read


BUM should be low

Storm Control enable by default

Storm-Control-Level = 80%  >> rate limit / Drop packet or Shutdown ( timeout or manually )


Link



Monitor Traffic
storm control level

monitor traffic levels


Drop if exceed thresholdBroadcast
multicast and
unknown uni-cast


Configurationdefault threshold: 80% of combine ( Bcst, mcst and unknown )
Create policy

set forwarding-policy storm-control-profile default all   ( 80% of BW available )

set forwarding-policy storm-control-profile demo action-shutdown all bandwidth-level 1000 ( kbit/s )


allall  ( for all BUM traffic )
Actions

Default: Discard

action-shutdown:  disable the interface

            clear ethernet-switching recovery-timeout 

Apply Policy

set interfaces ge-0/0/0 unit 0 family ethernet-switching storm-control demo ( or default)


recovery 

set interfaces ge-0/0/0 unit 0 family ethernet-switching recovery-timeout 3600  (1 hour )

( in the case of action-shutdown)

Show commands

show ethernet-switching interface ge-0/0/0

>> SCTL: Storm Control , if flag active >> shutdown and discard packet

log

show log messages | match L2ald  ( or L2ALD_ST_CTL)


clear port ( after Storm )

clear ethernet-switching recovery-timeout interface ge-0/0/0.0