03-16-2009 01:22 AM
The behaviours of "storm-control action shutdown" between C2950 and C2960 seems not the same, please note the following:
C2950:
C2950#show log
Mar 10 11:22:36.312 C2950: %STORM_CONTROL-2-SHUTDOWN: Storm control shut down FastEthernet0/18
Mar 10 11:22:48.312 C2950: %LINK-5-CHANGED: Interface FastEthernet0/18, changed state to administratively down
(Interface status changed to Admin Down)
C2960:
C2960#show log
Mar 11 13:44:48 C2960 16310: Mar 11 13:44:48.223 C2960: %PM-4-ERR_DISABLE: storm-control error detected on Fa0/22, putting Fa0/22 in err-disable state
Mar 11 13:44:49 C2960 16311: Mar 11 13:44:48.231 C2960: %STORM_CONTROL-3-SHUTDOWN: A packet storm was detected on Fa0/22. The interface has been disabled.
(Interface status changed to Err-disable)
As I found in the cisco web command reference, it said C2950 ports status should be changed to err-disable, but actually it change to "Admin down", is it I overlook somethings?
Also, there seems no command for "errdisable recovery cause broadcast" in C2950 switch too, is it C2950 IOS don't support this feature?
C2950#show errdisable recovery
ErrDisable Reason Timer Status
----------------- --------------
udld Enabled
bpduguard Enabled
security-violatio Enabled
channel-misconfig Enabled
vmps Enabled
pagp-flap Enabled
dtp-flap Enabled
link-flap Enabled
psecure-violation Enabled
gbic-invalid Enabled
dhcp-rate-limit Enabled
unicast-flood Enabled
loopback Enabled
Timer interval: 600 seconds
(No broadcast feature included?)
Since I would like to apply the same broadcast control to both switches (high broadcast=> port changes to err-disable=> port recovery) are there any methods or workaround for me applying C2950 also?
03-20-2009 06:26 AM
Excessive traffic has been detected on a port that has been configured to be shut down if a storm event is detected in the physical interface. The amount of traffic detected on the interface has exceeded the configured threshold values. Since the interface is configured to shutdown if a packet storm event is detected, it has been placed in an error-disabled state is the affected interface.
Recommended Action:
You can enable error-disabled recovery by using the errdisable recovery global configuration command to automatically re-enable the interface. You should determine and fix the root cause of the excessive traffic on the interface.
For further information click this link.
03-22-2009 06:39 PM
Thanks Bwalchez. But can I do the same thing with C2950 switch? Since I found the port status is changed to "shutdown" rather than "err-disable" in C2950 switch. Also there has no "errdisable recovery" command for broadcast like C2960.
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