Storm Control on Broadcast Traffic

Bundle lab · $29.99

Harden the campus access edge by capping broadcast traffic per-port with storm control. In this lab you will apply a broadcast ceiling on the user-facing access ports only, choosing a shutdown action if exceeded, and verify that normal host connectivity remains intact. The uplink to the default gateway/DHCP server is trusted and must not be rate-limited.

Learning objectives

• Identify trusted uplink vs. untrusted access ports at the Layer-2 edge
• Configure storm control to cap broadcast traffic at 20% on access interfaces
• Set storm-control action to shutdown the port upon threshold violation
• Verify storm-control state and thresholds using show commands
• Explain how broadcast storms impact a VLAN and how per-port caps mitigate blast radius

Troubleshooting focus

• If hosts lose connectivity after changes, ensure storm-control was not applied on the uplink
• If an access port goes err-disabled, check for storm-control violations and consider recovery
• If show storm-control shows no counters, confirm the command was applied to the correct interfaces