Use this procedure to enable storm control on the TOR switch so that the daisy chain topology limits excessive traffic.
Configure enable storm control on TOR switch so that Cisco NCS 1010 uses the required settings for the selected system setup, management, or routing workflow.
To enable storm control on a TOR switch, use the following commands:
Before you begin
Follow these steps to enable storm control on TOR switch:
Procedure
| 1. | Run the Enable storm control on TOR switch command to complete this task. When a large number of packets are broadcasted in a short time frame, it results in a traffic storm on a network. In a Daisy Chain network, excessive packet transmission by nodes and subsequent rebroadcasting by other nodes can lead to a traffic storm, overburdening the network. |
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| 2. | Run the Enable storm control on TOR switch command to complete this task. In the Daisy Chain configuration, data can be transmitted in both directions. One of the Top of the Rack (TOR) switch ports is in the Forward state and carries the traffic whereas the other port is in the Blocked state. Three consecutive hello misses moves the port from Blocked to the Forwarding state. |
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| 3. | Run the Enable storm control on TOR switch command to complete this task. When the NCS 1010 node reboots, the status of the port is changed from Blocked to Forwarding. Hence, a loop is created momentarily when both the TOR switch ports are in a forwarding state. This loop results in the duplication of packets on the network. To prevent this duplication, storm control must be enabled on the TOR switch. |
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| 4. | Run the Enable storm control on TOR switch command to complete this task. errdisable recovery interval value |
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| 5. | Run the Enable storm control on TOR switch command to complete this task. errdisable recovery cause storm-control |
The system completes the enable storm control on TOR switch task.